Novel methods for making chlorohydrins are provided using a Lewis acid catalyst with an olefin and peroxy compound or where an enantiomer is desired, a Lewis acid catalyst in combination with a chiral alcohol, particularly glycol, and a combination of a peroxy compound and alkenol. In certain situations, an epoxide may be employed.
Process for producing epoxyalcohols of high optical purity
申请人:ARCO Chemical Technology, L.P.
公开号:EP0454463A2
公开(公告)日:1991-10-30
A process for enriching or improving the optical purity of an asymmetric epoxidation reaction mixture is provided wherein one chiral epoxy alcohol enantiomer, preferably the one present in minor amounts, is effectively separated from the other chiral epoxy alcohol enantiomer by converting the former to an epoxy ester by stereoselective transesterification using a carboxylic acid derivative such as an enol ester and a lipase enzyme and then recovering the desired chiral epoxy alcohol enantiomer or reacting it in situ to form a chiral epoxy alcohol derivative.