One-pot synthesis of pyrano[4,3-b]quinolinones from 2-alkynyl-3-formylquinolines via oxidative 6-endo-dig ring closure
作者:Priyabrata Roy、Binay K. Ghorai
DOI:10.1016/j.tetlet.2011.11.016
日期:2012.1
regioselective one-pot procedure to synthesize pyranoquinolinones from readily available 2-alkynyl 3-formylquinolines under mild NaClO2/H2O2 conditions in good yields has been explored. This reaction sequence, involving oxidation followed by regioselective electrophilic 6-endo-dig cyclization is more efficient over the traditional Pd(0)-mediated synthesis. When scavenger-free conditions were used, unusual chlorinated
一个新的区域选择性一个-一锅法合成pyranoquinolinones从容易获得的2-炔基-3- formylquinolines温和的NaClO下2 / H 2 ö 2以良好的收率的条件已探索。该反应顺序,涉及氧化随后区域选择性电6-内-挖环化是在传统的Pd(0)介导的合成更有效。当使用无清除剂的条件时,获得了不寻常的氯化呋喃喹啉酮衍生物。