Process for the enzymatic separation of the optical isomers of racemic alpha-alkyl-substituted primary alcohols
申请人:ISTITUTO GUIDO DONEGANI S.p.A.
公开号:EP0328125A2
公开(公告)日:1989-08-16
A process is disclosed for the biotechnological resolution by means of enzymatic transesterification of the relevant racemic mixture of the optical isomers of α-alkyl-substituted alcohols having the formula (I):
wherein:
R represents a linear or branched (C₁-C₂₀)-alkyl or alkenyl group or an aryl group, also substituted or condensed with other groups, in particular a group of formula (II) or (III):
wherein:
Rii represents a (C₁-C₈)-alkyl group, a (C₁-C₄)-alkenyl group, an alkoxy, phenyl, phenoxy, benzoyl, heterocyclic group;
Riii represents a hydrogen or halogen atom;
Riv represents a (C₁-C₄)-alkyl group,
and wherein
Ri represents a (C₁-C₄)-alkyl group either equal to, or different from, R,
in the presence of an enzyme either free or immobilized on a support capable of selectively causing the S isomer to be esterified, with the R isomer being left substantially unchanged, and said isomers are then separated according to techniques known from the prior art.
The process is used in the synthesis of anti-inflammatory agents.
本发明公开了一种通过酶促酯交换反应,以生物技术解决具有式 (I) 的 α-烷基取代醇的光学异构体的相关外消旋混合物的工艺:
其中
R 代表线性或支链(C₁-C₂₀)烷基或烯基或芳基,也可与其他基团,特别是式 (II) 或 (III) 基团取代或缩合:
其中
Rii 代表(C₁-C₈)-烷基、(C₁-C₄)-烯基、烷氧基、苯基、苯氧基、苯甲酰基、杂环基;
Riii 代表氢原子或卤素原子;
Riv 代表 (C₁-C₄)- 烷基、
其中
Ri 代表与 R 相同或不同的 (C₁-C₄)- 烷基、
在一种酶的存在下,该酶可以是游离的,也可以是固定在支持物上的,该酶能够选择性地使 S 异构体酯化,而 R 异构体基本保持不变,然后根据现有技术中已知的技术分离所述异构体。
该工艺可用于合成抗炎剂。