A General Synthesis of Substituted Formylpyrroles from Ketones and 4-Formyloxazole
作者:Jonathan T. Reeves、Jinhua J. Song、Zhulin Tan、Heewon Lee、Nathan K. Yee、Chris H. Senanayake
DOI:10.1021/ol070340q
日期:2007.5.1
A novel two-step synthesis of substituted 2-formylpyrroles is described. Aldol adducts of ketones and 4-formyloxazole undergo a dehydration/oxazole hydrolysis/cyclization cascade on sequential treatment with MsCl/Et3N and aqueous NaOH to yield 5-substituted and 4,5-disubstituted 2-formylpyrroles. The methodology was extended to an N-benzyl thiazolium salt.