Access to Di- and Trisubstituted Oxazoles by NBS-Mediated Oxidative Cyclisation of<i>N</i>-Acyl Amino Acid Derivatives
作者:Surendar Reddy Bathula、Muktapuram Prathap Reddy、K. K. Durga Rao Viswanadham、Pochampalli Sathyanarayana、Maddi Sridhar Reddy
DOI:10.1002/ejoc.201300421
日期:2013.7
A remarkably simple method for the synthesis of di- and trisubstituted functionalised oxazoles under metal- and catalyst-free conditions is described. An iterative bromination and debromination of N-acylated amino acid derivatives with NBS as the sole reagent cleanly led to various substituted oxazoles.
描述了一种在无金属和无催化剂条件下合成二取代和三取代官能化恶唑的非常简单的方法。使用 NBS 作为唯一试剂对 N-酰化氨基酸衍生物进行迭代溴化和脱溴,干净地产生了各种取代的恶唑。