Reference

Chiral Bisphosphine BINAP-Stabilized Gold and Palladium Nanoparticles with Small Size and Their Palladium Nanoparticle-Catalyzed Asymmetric Reaction

Chiral Bisphosphine BINAP-Stabilized Gold and Palladium Nanoparticles with Small Size and Their Palladium Nanoparticle-Catalyzed Asymmetric Reaction. Tamura, Masaru; Fujihara, Hisashi (Department of Applied Chemistry and Molecular Engineering Institute, Kinki University, Higashi-Osaka 577-8502, Japan). Journal of the American Chemical Society, 125(51), 15742-15743 (English) 2003 American Chemical Society. CODEN: JACSAT. ISSN: 0002-7863. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 25 The redn.Several substances with their cas registry numbers 10025-78-2 and 1445-91-6 may be metioned in this study. of tetrachloroaurate or potassium tetrachloropalladate with sodium borohydride in the presence of optically active 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl [BINAP] gave the chiral (S)- or (R)-BINAP-stabilized gold or palladium nanoparticles which showed the small core (1.7 nm for BINAP-Au and 2.0 nm for BINAP-Pd) with narrow size distribution and remarkably high stability. Asym. hydrosilylation of styrene with trichlorosilane in the presence of chiral BINAP-Pd nanoparticles afforded an optically active 1-phenyl-1-trichlorosilylethane which was converted into an optically active 1-phenylethanol (95% enantiomeric excess) by oxidative cleavage of the carbon-silicon bond. .

Catalytic racemization of alcohols: applications to enzymic resolution reactions

Catalytic racemization of alcohols: applications to enzymic resolution reactions. Dinh, Phi M.; Howarth, Judith A.; Hudnott, Anna R. 1445-91-6 and 9001-62-1 are also occured in this study.; Williams, Jonathan M. J.; Harris, William (Dep. Chemistry, Loughborough Univ., Loughborough, Leicestershire LE11 3TU, UK). Tetrahedron Letters, 37(42), 7623-7626 (English) 1996 Elsevier. CODEN: TELEAY. ISSN: 0040-4039. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) The racemization of enantiomerically enriched alcs. has been achieved using a catalyst in the presence of a suitable ketone. Aluminum, rhodium or iridium catalysts have been successfully employed. This methodol. allows recycling of substrate for enzymic resoln. reactions. .