作者:Jianxin Yang、Xin Che、Qun Dang、Zhonglin Wei、Shu Gao、Xu Bai
DOI:10.1021/ol050181f
日期:2005.4.14
[reaction: see text] A novel methodology was developed for the efficient synthesis of 4-chloro-pyrimido[4,5-b][1,4]benzodiazepines. The key is the intramolecular Friedel-Crafts cyclization of 5-amino-4-(N-substituted)anilino-6-chloropyrimidine with either a carboxylic acid or its derivatives to construct the 4-chloro-pyrimido[4,5-b][1,4]benzodiazepine core. Subsequent nucleophilic substitution allows
[反应:见正文]为有效合成4-氯-嘧啶[4,5-b] [1,4]苯并二氮杂卓开发了一种新方法。关键是将5-氨基-4-(N-取代的)苯胺基-6-氯嘧啶与羧酸或其衍生物进行分子内Friedel-Crafts环化反应,以构建4-氯-嘧啶基[4,5-b] [ 1,4]苯二氮卓核。随后的亲核取代允许在靶分子中引入一个以上的多样性点。该策略提供了一种基于特权子结构访问化合物库的有效方法,这些子结构在药物开发中引起了人们的极大兴趣。