据报道,用于合成S-腺苷-L-甲硫氨酸 (SAM) 类似物的化学酶平台与下游 SAM 利用酶兼容。合成了 44 种非天然 S/Se 烷基化 Met 类似物,并将其用于探测五种不同的蛋氨酸腺苷转移酶 (MAT) 的底物特异性。人类 MAT II 是所分析的 MAT 中最受允许的之一,并且能够化学酶合成 29 种非天然 SAM 类似物。作为天然产物“烷基随机化”可行性的概念证明,通过使用耦合的 hMAT2-RebM 系统(RebM 是参与瑞贝卡霉素的糖 C4'- O-甲基转移酶)生成了一小组差异烷基化吲哚并咔唑类似物。生物合成)。在单个容器中耦合 SAM 合成和利用的能力避免了与 SAM 类似物快速分解相关的问题,从而为进一步研究各种 SAM 利用酶打开了大门。
A method of improving the stability of a quaternary ammonium salt and a method of efficiently preparing the quaternary ammonium salt having improved stability.
一种提高季铵盐稳定性的方法和一种高效制备稳定性提高的季铵盐的方法。
PROCESS FOR PRODUCING CARBOXYLIC ACID DERIVATIVE AND CONDENSING AGENT COMPRISING QUATERNARY AMMONIUM SALT
申请人:TOKUYAMA CORPORATION
公开号:EP1085000A1
公开(公告)日:2001-03-21
A process for producing a carboxylic acid derivative characterized by mixing a quaternary ammonium salt having a specific triazine ring in the molecule, a carboxylic acid compound, and a compound having a nucleophilic functional group to conduct the condensation reaction of the carboxylic acid compound with the compound having a nucleophilic functional group; and a condensing agent comprising the quaternary ammonium salt. By the process, the condensation reaction can be conducted under mild conditions and a carboxylic acid derivative, especially an amide or ester compound, can be obtained in high yield.
A method of improving the stability of a quaternary ammonium salt and a method of efficiently preparing the quaternary ammonium salt having improved stability.