申请人:NIPPON SHINYAKU COMPANY, LIMITED
公开号:EP0388003A2
公开(公告)日:1990-09-19
In accordance with a first aspect, the invention provides a process for producing an N-substituted moranoline derivative of the formula:
(wherein R is a hydrogen atom or a C₁-C₅ alkyl group) comprising the steps of:-
(a) adding a glucose donor to a culture broth obtained by culturing moranoline-producing bacteria as it is or having been subjected to alkylation, and then reacting cyclodextrin glycosyl transferase (CGTase) to produce an oligo-glycosyl N-substituted maronoline derivative of the formula:
(wherein R has the meaning defined above and n is 0 or an integer from 1 to 24) and, if desired, reacting glucoamylase (GA) to form a compound of formula (II) wherein n is 0;
(b) isolating the compound of formula (II); and
(c) hydrolyzing the isolated compound of formula (II) to obtain an N-substituted moranoline derivative of formula (I).
In accordance with another embodiment, the invention provides a stabilizing agent for an enzyme which comprises an enzyme stabilizing amount of an N-substituted moranoline derivative of the formula:
(wherein R¹ is a hydrogen atom or, a C₁-C₅ alkyl, phenyl C₁-C₅ alkyl, phenyl C₂-C₅ alkylenyl, phenyl C₂-C₅ alkynyl phenoxy C₁-C₅ alkyl, phenoxy C₂-C₅ alkenyl or phenoxy C₂-C₅ alkynyl, wherein the phenyl moiety is unsubstituted or substituted); or a glucose oligomer thereof.
根据第一方面,本发明提供了一种生产式中 N-取代的吗啉衍生物的工艺:
(其中 R 为氢原子或 C₁-C₅ 烷基)的工艺,包括以下步骤
(a) 将葡萄糖供体加入通过培养产生吗啉的细菌而得到的原样或经过烷基化的培养液 中,然后与环糊精糖基转移酶(CGTase)反应,生成式如下的寡糖基 N-取代的吗啉衍生物:
(其中 R 具有上文定义的含义,n 为 0 或 1 至 24 的整数),如果需要,与葡糖淀粉酶 (GA)反应生成式(II)化合物,其中 n 为 0;
(b) 分离出式(II)化合物;及
(c) 将分离出的式 (II) 化合物水解,得到式 (I) 的 N-取代吗啉衍生物。
根据另一个实施方案,本发明提供了一种酶稳定剂,它包括酶稳定量的式 N-取代的吗啉衍生物:
(其中 R¹ 是氢原子或 C₁-C₅ 烷基、苯基 C₁-C₅ 烷基、苯基 C₂-C₅ 烯基、苯基 C₂-C₅ 烷炔基 苯氧基 C₁-C₅ 烷基、苯氧基 C₂-C₅烯基或苯氧基 C₂-C₅炔基,其中苯基为未取代或取代);或其葡萄糖低聚物。