N-Bromosuccinimide as a Brominating Agent for the Transformation of N-H (or N-Benzyl) Ketoaziridines into Oxazoles
摘要:
A novel procedure for the direct synthesis of 2,5-diaryloxazoles starting from N-H ketoaziridines is described. The method proceeds via the in situ formation of N-bromoketoaziridines in the presence of N-bromosuccinimide followed by the generation of intermediate azomethine ylides. A plausible mechanism for this transformation is proposed.
Synthesis of Highly Substituted 2-Imidazolines through a Three-Component Coupling Reaction
作者:Yong-Min Liang、Yao Han、Yong-Xin Xie、Lian-Biao Zhao、Ming-Jin Fan
DOI:10.1055/s-2007-1000818
日期:2008.1
A simple strategy for the synthesis of highly substituted 2-imidazolines starting from terminal alkynes, sulfonyl azides, and N-unsubstituted aziridines via two steps with high regioselectivity is described.