Synthesis of [1,2,4]-triazolo-annulated 3-aza-A-homocholestanes—A novel class of pentacyclic compounds
作者:Hexiang Bai、Shijing Xia、Zhiming Li、Jingmei Wang、Quanrui Wang
DOI:10.1016/j.steroids.2012.01.016
日期:2012.4
This study was performed to investigate the reactivity of azocarbenium saltsderivedfrom 5alpha-cholestan-3-one towards 1,3-dipolar cycloaddition reactions with inverse electron-demand to produce unprecedented steroidal heterocyclic derivatives, i.e. [1,2,4]-triazolo-annulated 3-aza-A-homocholestanes 8 and 11 and picrates 12. The synthetic steps were comprised of oxidizing hydrazones 3 with tert-butyl