Re-functionalization of 9-Substituted Isocolchicides via Nucleophilic Tele-Substitution. A General Synthesis of 11-Alkyl(Aryl)thioisocolchicides
作者:Marino Cavazza、Francesco Pietra
DOI:10.1515/znb-1996-0921
日期:1996.9.1
methanol or dimethyl sulfoxide undergo ipso-substitution by sodium thiolates in mixture with the corresponding thiols, giving 9-alkyl(aryl)thio-substituted isocolchicides which are prone to in situ tele-substitution affording 11-alkyl(aryl)thio functionalized isocolchicides. Such C-11 activation by dicoordinated sulfur is used here for a general synthesis of 1 l-alkyl(aryl)thioisocolchicides.
甲醇或二甲基亚砜中的 9-取代异秋水仙酯与相应的硫醇混合后被硫醇钠同位取代,得到 9-烷基(芳基)硫代取代的异秋水仙剂,其易于原位远距离取代,得到 11-烷基(芳基)硫代官能化异秋水仙剂。这种由双配位硫引起的 C-11 活化在这里用于 11-烷基(芳基)硫代异秋水仙酯的一般合成。