申请人:KANEKA CORPORATION
公开号:EP0754669A1
公开(公告)日:1997-01-22
Processes for efficiently producing α-halo ketones, α-halohydrins and epoxides on an industrial scale. The prosesses include one for producing an α-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 α-haloacetic acid of general formula (2) or an acceptable salt thereof, one for producing an by reducing the α-halo ketone (3), and one for producing an epoxide (13) by treating the α-halohydrin (11) with a base to effect ring closure. The above prosesses are particularly suitable for producing optically active α-halo ketones, α-halohydrins and epoxides from the corresponding α-amino acid derivatives.
R1COA (1)
在工业规模上高效生产α-卤酮、α-卤素和环氧化物的工艺。这些工艺包括通过对通式(1)的羧酸衍生物与通式(2)的α-卤乙酸或其可接受的盐制备的金属烯醇反应产物进行脱羧来生产通式(3)的α-卤酮的工艺,通过还原α-卤酮(3)来生产环氧化物的工艺,以及通过用碱处理α-卤水林(11)以实现闭环来生产环氧化物(13)的工艺。上述方法特别适用于从相应的α-氨基酸衍生物中生产光学活性α-卤酮、α-卤代卤素和环氧化物。
R1COA (1)