Glyoxylic acid in the reaction of isatoic anhydride with amines: a rapid synthesis of 3-(un)substituted quinazolin-4(3H)-ones leading to rutaecarpine and evodiamine
作者:K. Raghavendra Rao、Akula Raghunadh、Ramamohan Mekala、Suresh Babu Meruva、T.V. Pratap、T. Krishna、Dipak Kalita、Eppakayala Laxminarayana、Bagineni Prasad、Manojit Pal
DOI:10.1016/j.tetlet.2014.09.011
日期:2014.10
A dual reactant/catalyst role of glyoxylic acid in the reaction of isatoic anhydride with various amines afforded a novel, robust and rapid synthesis of 3-(un)substituted quinazolin-4(3H)-ones. This metal catalyst-free reaction proceeds via an unusual and unexpected cleavage of C–C bond. A shorter and common route to two alkaloids, that is, rutaecarpine and evodiamine is also accomplished.
乙醛酸在isatoic酸酐与各种胺的反应中的双重反应物/催化剂作用提供了一种新颖,稳定和快速的3-(未)取代的喹唑啉-4(3 H)-酮的合成方法。这种无金属催化剂的反应是通过不寻常且出乎意料的C–C键断裂而进行的。还可以实现一条较短且常见的途径来获得两种生物碱,即芸香芸香碱和依夫二胺。