Patent ID: 6780810
Filing Date: 2004-08-24
Classification: B01J,C07B,C07C

Abstract:
A reusable multifunctional catalyst useful for the preparation of chiral vicinal diols, the said catalyst having formula Sâ€”M, wherein S is a support selected from the group consisting of LDH, resin, silica, clay alumina and Sâ€²â€”NR3X wherein Sâ€² is a unmodified support selected from resin and silica, R is an alkyl group selected from the group consisting of methyl, ethyl, propyl and butyl, X is selected from the group consisting of Cl, Br, I, F, OH and OAc; and M is an active species comprising two or more different transition metals selected from the group consisting of palladium, ruthenium, osmium, tungsten, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, and molybdenum, and wherein the reusable multifunctional catalyst is selected from the group consisting of LDH-PdOs, resin-PdOs SiO2â€”PdOs, SGS-(QN)2PHAL-PdOs, LDH-OsW, resin-OsW, SiO2â€”OsW, SGS-(QN)2PHAL-OsW, SGS-(QN)2PHAL-OsTi, LDH-PdOsW, resin-PdOsW, SiO2â€”PdOsW and SGS-(QN)2PHAL-PdOsW.