Bromoethylsulfonium Salt—A More Effective Annulation Agent for the Synthesis of 6- and 7-Membered 1,4-Heterocyclic Compounds
作者:Muhammad Yar、Eoghan M. McGarrigle、Varinder K. Aggarwal
DOI:10.1021/ol8023727
日期:2009.1.15
Reaction of bromoethylsulfonium salt with 1,2-/1,3-aminoalcohols gave six- and seven-membered rings in good-to-excellent yields. The reactions proceed through generation of a vinyl sulfonium salt followed by annulation to give 1,4-heterocyclic compounds such as morpholines and benzoxazepines in a simple procedure. The method accommodates a range of nitrogen substituents and the amino alcohol can be
溴乙基ulf盐与1,2- / 1,3-氨基醇的反应生成了六元和七元环,收率非常好。反应通过生成乙烯基sulf盐进行,然后通过简单的方法将其环合,得到1,4-杂环化合物,例如吗啉和苯并x氮平。该方法适应一系列的氮取代基,氨基醇可以被氨基硫醇和二胺取代,得到硫代吗啉,哌嗪和苯并二氮杂pine。