Convenient Direct Syntheses of Selectively para-Substituted Di-, Tri- and Tetra-Formylated Thiacalix[4]arenes
作者:Weiping Yang、Wei Wang、Rong Guo、Linbo Gong、Shuling Gong
DOI:10.1002/ejoc.201200252
日期:2012.6
thiacalix[4]arenes substituted on the para positions is described. Di- and triformylated thiacalix[4]arenes were obtained by formylation of partially propyl- or benzoyl-substituted thiacalix[4]arenes. Complete para-formylation was successfully achieved by formylation and dealkylation of tetraisopropoxythiacalix[4]arene conformers in one step. This experimental procedure is a simpler synthesis for completely