記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/acsomega.2c03496

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Royal Society of Chemistry (RSC)  

<p>Improved performance of an IrO₂ nanoparticle catalyst because of the B–N, B–C, and N–C functional groups and conductive rGO network in BN-rGO.</p>

DOI： 10.1039/d1ta00158b

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/acs.energyfuels.9b00994

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/cctc.201701326

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/acs.organomet.5b00636

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

The reaction of three types of carbon nanofibers (CNFs; platelet: CNF-P, tubular: CNF-T, herringbone: CNF-H) with Ir-4(CO)(12) in mesitylene at 165 degrees C provided the corresponding CNF-supported iridium nanoparticles, Ir/CNFs (Ir content=2.3-2.6wt.%). Transmission electron microscopy (TEM) studies of these Ir/CNF samples revealed that size-controlled Ir nanoparticles (average particle size of 1.1-1.5 nm) existed on the CNFs. Among the three Ir/CNF samples, Ir/CNF-T showed an excellent catalytic activity and chemoselectivity towards hydrogenation of functionalized nitroarenes and imines; the corresponding aniline derivatives were obtained with high turnover numbers at ambient temperature under 10atm of H-2, and the catalyst is reusable. Ir/CNF-T was also effective for the reductive N-alkylation of anilines with carbonyl compounds.

DOI： 10.1002/asia.201301184

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

DOI： 10.1002/cctc.201200058

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

Novel transformation of carboxylic acids to aldehydes is achieved by a one-pot procedure consisting of a ruthenium-catalyzed hydrosilane reduction with 1,2-bis(dimethylsilyl)benzene (2) followed by hydrolysis of the resulting cyclic disilylacetals 4.

DOI： 10.1246/cl.2012.229

担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

A triruthenium cluster, (mu(3), eta(2), eta(3), eta(5)-acenaphthylene)Ru-3(CO)(7) effectively catalyzes primary-alkylation reaction of electron-rich aromatic rings using a combination of hydrosilane and ester as a source of the primary-alkyl group. The reaction involves electrophilic substitution of arenes by carbocationic species stabilized by a neighboring alkoxy or siloxy group generated during the reduction of esters giving alkylated arenes after reductive removal of the alkoxy or siloxy group at the benzylic position. (C) 2011 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.tet.2011.08.033

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-BLACKWELL  

DOI： 10.1002/cctc.201100135

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society  

The H-shape alkanes of various arm lengths have been synthesized successfully through the Grignard reaction. The detailed investigation of these novel compounds may allow us to widen the topological chemistry field furthermore. The molecular form and molecular packing structure in the crystal lattice have been revealed successfully on the basis of X-ray structure analysis as well as the analysis of Raman longitudinal acoustic modes (LAM) sensitive to the alkyl zigzag chain segments. The molecular conformation in the crystal lattice is deformed markedly from the originally imagined H-shape. In the cases of C3HOH to C6HOH, for example, the molecules are packed in a complicated manner and the OH⋯O hydrogen bonds govern the whole intermolecular interactions mainly. Since the alkyl segmental length is not very long, the conformational change is not very drastic, i.e., the small configurational entropy. Synergic effect of the hydrogen bonds and the small configurational entropy gives the higher melting point as known from the thermal data. On the other hand, in the cases of C10HOH and C12HOH, one of the long alkyl chain arms is found to be bent by 90° so that all of the alky chain segments of planar-zigzag conformation can be packed as closely as possible, and the intermolecular OH⋯O hydrogen bonds are also formed effectively without any mistake. As a result, the contribution of nonbonded intra- and intermolecular van der Waals interactions between the trans-zigzag alkyl chain segments become major, and the coupling of this enthalpy effect with the larger configurational entropy effect of the molecular shape results in the decrement of the melting point which approaches gradually that of longer n-alkane compound. In this way a sensitive balance between the nonbonded van der Waals interact ons, the OH⋯O hydrogen bonds, as well as the configurational entropy effect gives the characteristic thermal behavior of the H-shape compounds. The thus-newly synthesized H-shape alkane compounds should give us new insight into the packing topology of complicated molecules, leading to the development of new functionality unexpected for normal linear alkane compounds. © 2011 American Chemical Society.

DOI： 10.1021/jp200782f

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：MDPI AG  

DOI： 10.3390/molecules16075387

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Chemical Society of Japan  

DOI： 10.1246/bcsj.20100155

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

DOI： 10.1002/asia.201000527

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

Hydrosilanes act as a reagent to cleave the C-O bond of OtBu groups in carbamates, carbonates, esters, and ethers by catalysis of a triruthenium cluster. The reaction offers a novel deprotection method for OtBu groups under neutral conditions, showing unique selectivities that have never been accomplished with conventional Bronsted or Lewis acidic promoters. Possible mechanisms for C-O cleavage are discussed oil the basis of NMR spectroscopic analysis.

DOI： 10.1002/ejoc.200901279

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

Novel polysiloxane gel, in which CuCl/bipyridine species are immobilized, is prepared by treatment of polymethylhydrosiloxane with 4,4&apos;-bis[(2-propenyl)oxy]-2,2&apos;-bipyridine and 1,5-hexadine in the presence of Karstedt&apos;s catalyst followed by addition of CuCl. This polysiloxane gel acts as a reusable catalyst in the atom-transfer radical cyclization of alpha-halogenated acetamide derivatives in high turnover numbers without allowing leakage of the metal species.

DOI： 10.1039/b923213c

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

Rhodium nanoparticles supported on a carbon nanofiber (Rh/CNF-T) show high catalytic activity toward arene hydrogenation under mild conditions in high turnover numbers without leaching the Rh species; the reaction is highly tolerant to epoxido groups, which often undergo ring-opening hydrogenation with conventional catalysts.

DOI： 10.1021/ol902018g

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

The synergetic effect of two Si-H groups leads to efficient reduction of carboxamides to amines by platinum catalysts under mild conditions The rate of the reaction is dependent on the distance of two Si-H groups, 1,1,3,3-tetramethyidisiloxane (TMDS) and 1,2-bis(dimethylsilyl)benzene are found to be an effective reducing reagent. The reduction of amides having other reducible functional groups such as NO(2), CO(2)R, CN, C=C, Cl, and Br moieties proceeds with these groups remaining intact, providing a reliable method for the access to functionalized amine derivatives. The platinum-catalyzed reduction of amides with polymethylhydrosiloxane (PMHS) also proceeds under mild conditions. The reaction is accompanied by automatic removal of both platinum and silicon wastes as insoluble silicone resin, and the product is obtained by simple extraction. A mechanism involving double oxidative addition of TMDS to a platinum center is discussed.

DOI： 10.1021/ja9055307

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

Novel polysiloxane gels, to which platinum species are encapsulated, are prepared by treatment of polymethylhydrosiloxane with alkenes in the presence of Karstedt&apos;s catalyst. These gels act as reusable catalysts in the reduction of functionalized nitroarenes with H(2) to the corresponding substituted anilines without leaking the catalyst species.

DOI： 10.1021/ol9001366

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5059/yukigoseikyokaishi.67.724

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

DOI： 10.1002/anie.200905025

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

The combination of IrCl(CO)(PPh(3))(2) with 1,1,3,3-tetramethyldisiloxane or poly(methylhydrosiloxane) (PMHS) is found to be an efficient catalyst system for the preparation of aldenamines from carboxamides; in particular, facile removal of silicone and iridium residues from the product can be achieved by the use of PMHS.

DOI： 10.1039/b821317h

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1002/ejoc.200800523

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

Platinum and palladium nanoparticles supported on three types of carbon nanofibers (CNFs) are synthesized and used as catalysts in the hydrogenation of nitroarenes. Nanosized platinum particles dispersed on platelet-type CNF efficiently catalyze the reduction of functionalized nitroarenes to the corresponding substituted anilines in high turnover numbers with other functional groups remaining intact.

DOI： 10.1021/ol800277a

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

Novel ruthenium-encapsulating polysiloxane gels are prepared by treatment of polymethylhydrosiloxane with diols in the presence of (mu(3),eta(2),eta(3),eta(5)-acenaphthylene)Ru(3)(CO)(7), and act as reusable catalysts in the isomerization of alkenes without leakage of the catalyst species.

DOI： 10.1039/b809937e

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1021/jo702015j

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

The addition of amines eliminates the catalytic activity of a triruthenium cluster in the hydrosilane reduction of ketones and esters without affecting the rate of reduction of amides; selective reduction of the amide group in amido ketones and amido esters is accomplished.

DOI： 10.1039/b711743d

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

[GRAPHICS]
A trituthenium cluster, (mu(3),eta(2),eta(3),eta(5)-acenaphthylene)Ru-3(CO)(7) (1) catalyzes the reaction of secondary amides with hydrosilanes, yielding a mixture of secondary amines, tertiary amines, and silyl enamines. Production of secondary amines with complete selectivity is achieved by the use of higher concentration of the catalyst (3 mol %) and the use of bifunctional hydrosilanes such as 1, 1,3,3-tetramethyldisiloxane. Acidic workup of the reaction mixture affords the corresponding ammonium salts, which can be treated with a base, providing a facile method for isolation of secondary amines with high purity. In contrast, tertiary amines are formed with high selectivity by using lower concentration of the catalyst (I mol %) and polymeric hydrosiloxanes (PMHS) as reducing agent. Reduction with PMHS encapsulates the ruthenium catalyst and organic byproducts to the insoluble silicone resin. The two reaction manifolds are applicable to various secondary amides and are practical in that the procedures provide the desired secondary or tertiary amine as a single product. The product contaminated with only minimal amounts of ruthenium and silicon residues. On the basis of the products and observed side products as well as NMR studies a mechanistic scenario for the reaction is also described.

DOI： 10.1021/jo070591c

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.tetlet.2007.03.063

その他リンク： http://orcid.org/0000-0001-6368-4823

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

The reaction of three types of carbon nanofibers (CNFs; platelet: CNF-P, tubular: CNF-T, herringbone: CNF-H) with [Ru-3(CO)(12)] in toluene heated at reflux provided the corresponding CNF-supported ruthenium nanoparticles, Ru/CNFs (Ru content= 1.1-3.8wt%). TEM studies of these Ru/CNFs revealed that size-controlled Ru nanoparticles (2-4 nm) exist on the CNFs, and that their location was dependent on the surface nanostructures of the CNFs: on the edge of the graphite layers (CNF-P), in the tubes and on the surface (CNF-T), and between the layers and on the edge (CNF-H). Among these Ru/CNFs, Ru/CNF-P showed excellent catalytic activity towards hydrogenation of toluene with high reproducibility; the reaction proceeded without leaching of the Ru species, and the catalyst was reusable. The total turnover number of the five recycling experiments for toluene hydrogenation reached over 180000 (mol toluene) (mol Ru)(-1). Ru/CNF-P was also effective for the hydrogenation of functionalized benzene derivatives and pyridine. Hydrogenolysis of benzylic C-O and C-N bonds has not yet been observed. Use of poly(ethylene glycol)s (PEGs) as a solvent made possible the biphasic catalytic hydrogenation of toluene. After the reaction, the methylcyclohexane formed was separated by decantation without contamination of the ruthenium species and PEG. The insoluble PEG phase containing all of the Ru/CNF was recoverable and reusable as the catalyst without loss of activity.

DOI： 10.1002/asia.200700175

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Royal Society of Chemistry (RSC)  

DOI： 10.1039/b617356j

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

Facile synthesis of ruthenium nanoparticles supported on the carbon nanotibers (CNFs) is accomplished by thermal decomposition of Ru-3 (CO)(12); ruthenium species on the platelet-type CNF are dispersed homogeneously and selectively on the edge of the graphite layers with narrow size distributions and behaves as an excellent catalyst for arene hydrogenation.

DOI： 10.1246/cl.2006.876

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.tetlet.2006.06.165

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE SA  

Chiral palladium and platinum complexes bearing non-symmetrical, PCN pincer ligand, 6-methoxy-3-(4'-isopropyl-2'-oxazolin-2'-yl)phenyl diphenylphosphinite [i-Pr-Phemox-OPPh2], are first synthesized via oxidative addition of (i-Pr-Phemox-OPPh2)Br 6 to Pd-2(dba)(3)(.)(CHCl3) or Pt(dba)(2) and subsequent treatment with silver salts. (c) 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.ica.2005.06.034

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

Treatment of lithium phosphinoamides, Ph2PN(Li)R [R = Bu-1, Pr-i], with TiCl4 results in formation of titanium phosphinoamides, (Ph2PNR)(2)TiCl2 [R = Bu-t (1a), Pr-i (1b)]. Crystallographic studies show that there are covalent bonds between the titanium and two nitrogen atoms, whereas two phosphorus atoms are coordinated to the metal center intramolecularly. Variable-temperature NMR studies suggest reversible dissociation of the phosphorus moieties from the titanium in solution. The dissociated phosphorus moieties are effectively captured by Pt(11) species; reactions of la with either (eta(4)-COD)PtCl2, (eta(4)-COD)Pt(R)(Cl) (R = Me, p-Tol), or [Me2Pt(mu-SMe2)](2) afford the corresponding Ti-Pt heterobi metallic complexes. The molecular structures of these complexes reveal that they have a six-membered dimetallacycle, in which a titanium and a platinum are connected by two bridging phosphinoamide ligands; the Pt-Ti distances indicate the existence of a Pt -&gt; Ti dative bond. The conformation of the dimetallacycle is a boat form, with two metals at the bow and the stem in the crystal; however, dynamic conformational change involving cleavage and re-formation of the Pt-Ti dative bond is indicated from variable-temperature NMR studies.

DOI： 10.1021/om0509600

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Atom-transfer radical cyclization (ATRC) catalyzed by coordinatively unsaturated ruthenium alkoxides 4, [(eta(5)-C5Me5)-Ru(OR)](2), is investigated, and ruthenium methoxide 4a (R=Me) is found to exhibit excellent catalytic activity for the cyclization of N-allyl-alpha,alpha-dichloroacetamides at ambient temperature. Addition of some amounts of two-electron donor ligands such as pyridine and triphenylphosphine improves the catalyst efficiency to afford the corresponding gamma-lactams in high yields. The high catalytic activity of this catalyst system enables to control the diastereoselectivity of this 5-exo cyclization kinetically. The present 4a/pyridine system is also effective for the 4-exo cyclization of N-vinylacetarnides to afford the corresponding beta-lactams in quantitative yields. The 4a/pyridine system is also active towards the ATRP of methyl methacrylate (MMA) at room temperature to afford the poly(MMA) with narrow molecular weight distributions (M-w/M-n = 1.2) at the initial stage. (c) 2006 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.tet.2006.01.011

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.tet.2005.08.037

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

DOI： 10.1021/ja0544531

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/om050091e

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/j.jorganchem.2004.09.075

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Royal Society of Chemistry (RSC)  

DOI： 10.1039/b502942b

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley Blackwell  

DOI： 10.15227/orgsyn.082.0188

記述言語：英語   掲載種別：研究論文（学術雑誌）  

The polymerization of vinyl ethers (CH2=CHOR, R = nBu, iBu, tBu, iPr) is catalyzed by a ruthenium cluster, (μ3,η2:η3: η5-acenaphthylene)Ru3(CO)7 (1), using several hydrosilanes as the initiator to give polyvinyl ethers with M n = 2000-25 000 and Mw/Mn = 1.2-3.4. Spectroscopic analysis of the polymer reveals the existence of an organosilyl moiety at the end group, which is supported by UV and RI detection of GPC. The poly(tert-butyl vinyl ether) prepared by PhMe2SiD as the initiator contains a -CDHOtBu group at the other polymer end. These data suggest the polymer structure is R3Si-(CH2CHOR) n-H. Dominant heterotacticity was observed for the polymer structure, which was independent of organosilanes or solvents.

DOI： 10.1021/om049499m

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Isocyanide complexes of nickel, NiBr2(CNAr)2, are found to be active catalysts for polymerization of ethylene in the presence of methylaluminoxane (MAO). The catalytic activity and properties of polyethylene formed vary with substituents on the aryl group, in particular, at the 2- or 2,6-positions. The nickel complexes having 2,6-diphenylphenyliso-cyanide and its analogues are catalysts showing moderate activity and giving high molecular weight polyethylene (Mv > 106), whereas those bearing 2-phenylphenylisocyanide and its analogues give polyethylene with Mw = 103-104.

DOI： 10.1021/om0498394

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Georg Thieme Verlag KG  

DOI： 10.1055/s-2003-41474

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.5059/yukigoseikyokaishi.61.343

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Wiley  

DOI： 10.1002/1521-3765(20020703)8:13<2968::aid-chem2968>3.0.co;2-6

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/om020274q

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/om011011j

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/om010018y

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Elsevier BV  

DOI： 10.1016/s0040-4020(00)01049-8

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/om9908682

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：WILEY-V C H VERLAG GMBH  

Asymmetric reaction of an excess of trans-cyclooctene (1) with chiral bis(dihydrooxazolyl)pyridineruthenium (pybox-ip, 3) complex selectively gives the corresponding ruthenium complex 4R, [RuCl2(pybox-ip){(R)-trans-cyclooctene}], and (S)-trans-cyclooctene 2S. The X-ray crystal structure of complex 4R shows a C25-C18-C19-C20 dihedral angle of 125 degrees with a C18-C19 bond length of 1.41 Angstrom. Complex 4R can also be obtained by UV irradiation of a solution of cis-cyclooctene and [RuCl2-(pybox-ip)(C2H4)] (8) in THF in the presence of a photosensitizer. Even in the absence of the photosensitizer, 4R is produced by irradiation in the presence of cis-cyclooctene. The photoreaction has been applied to cis-cycloheptene to give a 1:1 mixture of the diastereomeric complexes of [Ru(pybox-ip)-{trans-cycloheptene}].

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：American Chemical Society (ACS)  

DOI： 10.1021/om990251k

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

The reaction of (Phebox)SnMe3 1 [PheboxH = 2,6-bis(oxazolinyl)benzene] and [(c-octene)RhCl](2) in the presence of CCl4 provided air-stable and water-tolerant (Phebox)RhCl2(H2O) complexes 2 which acted as asymmetric catalysts for the enantioselective allylation of aldehydes in up to 80% ee.

担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD  

Single-chiral bis(oxazolinyl)pyridine ligands were examined as ligands for ruthenium-catalyzed asymmetric catalytic cyclopropanation of olefins: enantioselectivities up to 94% for the trans-cyclopropane were observed. (C) 1998 Elsevier Science Ltd. All rights reserved.

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：AMER CHEMICAL SOC  

The reaction of [(p-cymene)RuCl2](2) and 2,6-bis(oxazolin-2-yl)pyridines (PYbox) in the presence of alpha,beta-unsaturated carbonyl compounds as prochiral olefins gave eta(2)-olefin complexes as single conformations. From its NMR spectra and X-ray diffraction, these chiral (Pybox)RuCl2 fragments not only discriminated the one enantioface (si-face) of the alkenes but also fixed the conformation of carbonyl moiettes s-trans.

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ROYAL SOC CHEMISTRY  

Ruthenium-pyridine-2,6-dicarboxylate (pydic) complexes 1-3 of terpyridine and chiral bis(oxazolinyl)pyridines (pybox-ip and pybox-ph), which can be synthesized from [Ru(p-cymene)Cl-2](2) and the corresponding ligands, exhibit catalytic activity for epoxidation of trans-stilbene in combination with [bis(acetoxy)iodo]benzene: asymmetric induction with 2 was observed in 74% ee for trans-stilbene.

記述言語：英語   掲載種別：研究論文（学術雑誌）  

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

The transmetalation of Phebox-ip-SnMe3 [Phebox = 2,6-bis(oxazolinyl)phenyl] 1c with RhCl3(H2O)(3) and PdCl2(PhCN)(2) gave (Phebox-ip)RhCl2(H2O) 2a and (Phebox-ip)PdCl 3 under mild conditions in 45% and 96% yields, respectively. The crystal structures of (Phebox-ip)Rh Cl-2(t-BuNC) 2b, which was obtained by the reaction of 2a with t-BuNC, and 3 have bees determined by X-ray diffraction.

担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：CHEMICAL SOC JAPAN  

The reaction of RuCl2(pybox)(C2H4) [pybox = 2,6-bis(oxazolinyl)pyridine] 1 and OsCl2(pybox)(propylene) 6 with dimethyl diazomalonate gave stable dicarbonylcarbene complexes 9 and 10 in 92% and 59% yields, respectively. The carbene moiety of 9 proved to be almost parallel in the Cl-Ru-Cl plane by 10-12 degrees and perpendicular to the pybox plane by X-ray analysis. The transfer of the carbene moiety of 9 to styrene could be observed at 110 degrees C to give the corresponding cyclopropane 15 but in a low yield (11%) with asymmetric induction in 36% ee.

記述言語：英語   掲載種別：研究論文（学術雑誌）  

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

A chiral titanium complex 1a derived from 6,6'-dibromo-1,1'-bi-2-naphthol is found to give higher endo- and enantioselectivity along with higher catalytic activity than the parent binaphthol-derived titanium complex 1b in the (hetero) Diels-Alder reactions of 1-methoxydienes (2a and 2c) with methacrolein and glyoxylate but not with bromoacrolein.

DOI： 10.1055/s-1995-5138

記述言語：英語   掲載種別：研究論文（学術雑誌）  

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Diastereo- and enantioselective carbonyl-ene reaction of glyoxylate (2) with trisubstituted olefins (3) catalyzed by chiral titanium complexes (1a), derived from 6,6′-dibromo-1,1′-bi-2-naphthol and diisopropoxytitanium dihalides, is found to provide syn-diastereomers exclusively along with a high level of enantioselectivity. © 1994.

DOI： 10.1016/S0040-4039(00)73470-8

記述言語：英語   掲載種別：研究論文（学術雑誌）  

A new type of titanium complex (N) derived from modified binaphthyl, 1,1′-bi-6-bromo-2-naphthol (6-Br-BINOL, 1) (98% e.e.) is found to be an extremely efficient asymmetric catalyst for the glyoxylate-ene reaction with α-methylstyrene to give the ene product with 97.5% e.e. in 94% yield. A certain level of positive non-linear effect (asymmetric amplification) is also observed in the present glyoxylate-ene reaction. The 6-Br-BINOL-derived titanium complex (98% e.e.) affords the glyoxylate-ene product of methylenecyclohexane with more than 99% e.e.! in 82% yield. Furthermore, 70% e.e. of 6-Br-BINOL leads eventually to 85% e.e. of the glyoxylate-ene product with α-methylstyrene. A higher level of asymmetric induction is observed in a less polar solvent, toluene, suggesting that dipolar repulsion is operative in controlling the conformation of the ligand 6-Br-BINOL (1). Unfortunately, however, the titanium complex N′ derived from the binaphthyl ligand 2 with the sterical demanding trifylamine moiety gave a disappointingly low level of asymmetric induction in the glyoxylate-ene reaction. © 1994.

DOI： 10.1016/0020-1693(94)03895-3

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Asymmetric Diels-Alder (D.—A.) reaction of 5-hydroxynaphthoquinone (juglone) with butadienyl acetate catalyzed by the binaphthol-derived chiral titanium (BINOL-Ti) complex 1 proceeds in only 9% ee in the presence of molecular sieves (MS). Remarkably, however, this reaction proceeds in 76-96% ee with BINOL-Ti complex 1 freed from MS to provide the enrfo-adducts useful for the synthesis of anthracyclines and tetracyclines. The solid MS-free BINOL-Ti complex 1 is stable for months at —20 °C. Enhancements in endo selectivity and asymmetric induction are observed with the MS-free BINOL-Ti 1 also in the catalyzed D.—A. cycloaddition of methacrolein and glyoxylate with 1, 3-dienol ethers and esters. The glyoxylate adducts can be converted to the mevinolin (compactin) intermediates. Surprisingly, the MS-free complex 1 exhibits not only a linear relationship between the ee's of BINOL-Ti 1 and the D.-A. products but also a positive nonlinear effect (asymmetric amplification), depending simply on the mixing manner of (J?)-l with (S>1 or (±)-l.© 1994, American Chemical Society. All rights reserved.

DOI： 10.1021/ja00086a014

記述言語：英語   掲載種別：研究論文（学術雑誌）  

Asymmetric Diels-Alder reactions of methacrolein and 1,4-naphthoquinone with 1,3-dienol derivatives catalyzed by the chiral binaphthol (BINOL)-derived titanium complex 1 are shown to provide the corresponding endo-adducts in high enantiomeric purity. The naphthoquinone adduct can serve as a synthetic intermediate of tetracycline antibiotics. © 1991.

DOI： 10.1016/S0957-4166(00)86118-2

担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（学術雑誌）  

記述言語：英語   著書種別：学術書

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