申请人:Bayer Aktiengesellschaft
公开号:US06472570B1
公开(公告)日:2002-10-29
This invention relates to process for asymmetric dihydroxylation of olefins using osmium catalysts to obtain monofunctional, bifunctional, and/or polyfunctional chiral 1,2-diols of the formula (I)
R1R2C(OH)—C(OH)R3R4 (I)
where R1 to R4 are defined herein, by reacting an olefin of the formula (II)
R1R2C═CR3R4 (II)
where R1 to R4 are defined as for formula (I),
with molecular oxygen in the presence of an osmium compound and a chiral amine ligand in water or a water-containing solvent mixture at a pH of from 8.5 to 13.
这项发明涉及使用钌催化剂对烯烃进行不对称二羟基化的过程,以获得式(I)的单官能团、双官能团和/或多官能团手性1,2-二醇:
R1R2C(OH)—C(OH)R3R4 (I)
其中R1至R4在此处定义,通过在水或含水溶剂混合物中,在pH值为8.5至13的条件下,将式(II)的烯烃:
R1R2C═CR3R4 (II)
其中R1至R4如式(I)所定义,
与分子氧在钌化合物和手性胺配体的存在下反应而得。