Process for production of optically active 3-hydroxypentanenitrile
    61.
    发明授权
    Process for production of optically active 3-hydroxypentanenitrile 失效
    光学活性3-羟基戊腈的制备方法

    公开(公告)号:US07148055B2

    公开(公告)日:2006-12-12

    申请号:US10491115

    申请日:2002-10-03

    IPC分类号: C12P41/00

    摘要: The present invention provides a method for preparing optically active 3-hydroxypentanenitrile with high yield. Optically active 3-hydroxypentanenitrile is prepared by stereoselectively reducing 3-ketopentanenitrile by action of an enzyme, which asymmetrically reduces 3-ketopentanenitrile to optically active 3-hydroxypentanenitrile. Also, alkali metal salt of 3-ketopentanenitrile, which is a stable compound without problems regarding storage, can be efficiently obtained.

    摘要翻译: 本发明提供了一种以高产率制备光学活性3-羟基戊腈的方法。 通过酶的作用立体选择性还原3-酮戊腈制备光学活性3-羟基戊腈,其将3-酮戊腈不对称地还原成光学活性3-羟基戊腈。 此外,可以有效地获得作为没有储存问题的稳定化合物的3-酮戊腈的碱金属盐。

    Method for preparing optically active beta-butyrolactones
    66.
    发明申请
    Method for preparing optically active beta-butyrolactones 审中-公开
    制备光学活性β-丁内酯的方法

    公开(公告)号:US20060046286A1

    公开(公告)日:2006-03-02

    申请号:US11209643

    申请日:2005-08-24

    IPC分类号: C12P17/04 C12P41/00

    CPC分类号: C12P17/04 C12P41/001

    摘要: The present invention is to provide a method for preparing easily and efficiently β-butyrolactones and/or optically active 3-hydroxycarboxylic acid derivatives in high optical purity by use of an easily available hydrolase, which are useful as intermediates for pharmaceuticals, agrochemicals and the like. More particularly, the present invention relates to a method for preparing β-butyrolactones and/or optically active 3-hydroxycarboxylic acid derivatives with an optical purity of substantially 100% ee, comprising reacting a β-butyrolactone which is a mixture of optical isomers, with a nucleophilic agent in the presence of a hydrolase, provided that a lipase derived from porcine pancreas is excluded.

    摘要翻译: 本发明是提供一种通过使用易于获得的水解酶来制备高光学纯度的β-丁内酯和/或光学活性3-羟基羧酸衍生物的方法,其可用作药物,农业化学品等的中间体 。 更具体地,本发明涉及一种制备光学纯度基本上为100%ee的β-丁内酯和/或光学活性3-羟基羧酸衍生物的方法,包括使作为旋光异构体的混合物的β-丁内酯与 亲水试剂在水解酶存在下,条件是排除源自猪胰腺的脂肪酶。

    Chemically modified mutant serine hydrolases show improved catalytic activity and chiral selectivity
    67.
    发明申请
    Chemically modified mutant serine hydrolases show improved catalytic activity and chiral selectivity 审中-公开
    化学修饰的突变丝氨酸水解酶显示出改进的催化活性和手性选择性

    公开(公告)号:US20050282248A1

    公开(公告)日:2005-12-22

    申请号:US10791093

    申请日:2004-03-01

    CPC分类号: C12N9/54

    摘要: This invention provides novel chemically modified mutant serine hydrolases that catalyze a transamidation and/or a transpeptidation and/or a transesterification reaction. The modified serine hydrolases have one or more amino acid residues in a subsite replaced with a cysteine, wherein the cysteine is modified by replacing the thiol hydrogen in the cysteine with a substituent group providing a thiol side chain comprising a moiety selected from the group consisting of a polar aromatic substituent, an alkyl amino group with a positive charge, and a glycoside. In particularly preferred embodiments, the substitutents include an oxazolidinone, a C1 to C15 alkyl amino group with a positive charge, or a glycoside.

    摘要翻译: 本发明提供新颖的化学修饰的突变丝氨酸水解酶,其催化转酰胺化和/或转肽化和/或酯交换反应。 修饰的丝氨酸水解酶在被半胱氨酸替代的子位点中具有一个或多个氨基酸残基,其中通过用提供包含选自以下的部分的硫醇侧链的取代基取代半胱氨酸中的巯基氢来修饰半胱氨酸。 极性芳族取代基,带正电荷的烷基氨基和糖苷。 在特别优选的实施方案中,取代基包括恶唑烷酮,带正电荷的C 1至C 15烷基氨基或糖苷。