Modification of 1-Substituents in the 2-Azabicyclo[2.1.1]hexane Ring System; Approaches to Potential Nicotinic Acetylcholine Receptor Ligands from 2,4-Methanoproline Derivatives
作者:John R. Malpass、Anup B. Patel、John W. Davies、Sarah Y. Fulford
DOI:10.1021/jo035199n
日期:2003.11.1
Successful nucleophilic substitution at a methylene attached to the bridgehead (1-) position of the 2-azabicyclo[2.1.1]hexane ring system opens the way to construction of novel derivatives having a wider range of functional groups attached to the 1-position via a methylene "spacer" (including the beta-amino acid homologue of 2,4-methanoproline) and provides access to epibatidine analogues containing
在连接到2-氮杂双环[2.1.1]己烷环桥头(1-)位置的亚甲基上成功进行亲核取代,为构建具有更广泛官能团的新型衍生物开辟了道路,该衍生物通过亚甲基“间隔基”(包括2,4-甲基脯氨酸的β-氨基酸同系物),并提供与含有杂环取代基的表巴替丁类似物的接触,以及1-位上的进一步同源性。具有核沉子损失的置换(例如,从1-甲磺酰氧基甲基衍生物损失甲磺酸根阴离子)需要热活化,但是在没有这种应变的双环系统中最初预期的重排的情况下进行。一种新的三环氨基甲酸酯中间体17已被分离出来。