Formation of Bridge-Methylated Decalins by Antibody-Catalyzed Tandem Cationic Cyclization
作者:Jens Hasserodt、Kim D. Janda、Richard A. Lerner
DOI:10.1021/ja970675a
日期:1997.7.1
functionality as the key structure to elicit a combining site architecture capable of promoting leaving group release. The kcat for the formation of sulfonic acid in the catalyzed reaction was determined to be 0.021 min-1. The efficiency of the antibody-catalyzed process is underscored by the fact that the bicyclic products are not formed in the absence of the antibody catalyst under our mild conditions
我们报告了在中性 pH 下产生双环系统的亲电子串联成环过程的抗体催化作用。代表类固醇核的环 A 和 B 的三个密切相关的十氢化萘系统占总产品的 50%。线性二烯底物被设计为模拟 2,3-氧化角鲨烯的前两个异戊二烯单元,其中环氧化物氧已被芳基磺酸盐取代作为离去基团。半抗原基于十氢喹啉系统,以 N-氧化物官能团为关键结构,以引发能够促进离去基团释放的结合位点结构。在催化反应中形成磺酸的 kcat 确定为 0.021 min-1。