申请人:Kaneka Corporation
公开号:US05929284A1
公开(公告)日:1999-07-27
Processes for efficiently producing .alpha.-halo ketones, .alpha.-halohydrins and epoxides on an industrial scale. The prosesses include one for producing an .alpha.-halo ketone of general formula (3) by decarboxylating a product of reaction between a carboxilic acid derivative of general formula (1) and a metal enolate prepared from an .alpha.-haloacetic acid of general formula (2) or an acceptable salt thereof, one for producing an by reducing the .alpha.-halo ketone (3), and one for producing an epoxide (13) by treating the .alpha.-halohydrin (11) with a base to effect ring closure. The above prosesses are particularly suitable for producing optically active .alpha.-halo ketones, .alpha.-halohydrins and epoxides from the corresponding .alpha.-amino acid derivatives. ##STR1##
工业规模上高效生产α-卤代酮、α-卤代醇和环氧化合物的方法。这些方法包括通过脱羧一种由一般公式(1)的羧酸衍生物与由一般公式(2)的α-卤代乙酸或其可接受的盐制得的金属烯醇盐的反应产物来生产一般公式(3)的α-卤代酮的一种方法,通过还原α-卤代酮(3)来生产α-卤代醇的一种方法,以及通过用碱处理α-卤代醇(11)以实现环闭合来生产环氧化合物(13)的一种方法。上述过程特别适用于从相应的α-氨基酸衍生物生产光学活性的α-卤代酮、α-卤代醇和环氧化合物。