摘要:
A process for producing optically active 1-halo-3-amino-4-phenyl-2-butanol derivatives from optically active 1-halo-3-amino-4-phenyl-2-butanone derivatives stereoselectively in a high yield by bringing the butanone derivatives into contact with microorganisms.
摘要:
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.
R 1 COA (1)
摘要翻译:在工业规模上有效生产α-卤代酮,α-卤代醇和环氧化物的方法。 前药包括通过使通式(1)的羧酸衍生物与由通式(2)的α-卤代乙酸制备的金属烯醇化物脱羧的方法来制备通式(3)的α-卤代酮, )或其可接受的盐,其中一个用于通过还原α-卤代酮(3)和一个用于通过用碱处理α-卤代醇(11)以形成环闭合来制备环氧化物(13)来制备。 上述产品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-卤代醇和环氧化物。 R 1 COA