The present invention provides a supported osmate useful as a reusable catalyst in the preparation of vicinal diols. The present invention also relates to a process for the preparation of supported osmates of the formula (S—NR
3
)
2
OsO
4
.nH
2
O wherein S is a support, R is an alkyl group, n is the number of water molecules and use thereof in the preparation of vicinal diols by asymmetric dihydroxylation (AD) of olefins in presence of cinchona alkaloid compounds.
本发明提供了一种作为可重复使用催化剂在邻二醇制备中有用的支持的
钌酸盐。本发明还涉及一种制备公式为(S—NR3)2OsO4.nH2O的支持的
钌酸盐的方法,其中S是支持物,R是烷基,n是
水分子的数量,并在
奎宁生物碱化合物存在下通过不对称二羟基化(AD)制备邻二醇时使用该催化剂。