Preparation of Functional Benzofurans, Benzothiophenes, and Indoles Using Ester, Thioester, and Amide via Intramolecular Wittig Reactions
作者:Siang-en Syu、Yu-Ting Lee、Yeong-Jiunn Jang、Wenwei Lin
DOI:10.1021/ol201062r
日期:2011.6.3
Preparation of new types of highly functional benzofurans, benzothiophenes, and indoles is realized via intramolecular Wittig reactions with the corresponding ester, thioester, and amide functionalities. The key intermediates, phosphorus ylides, presumably result from the addition of Bu3P toward aldehydes followed by acylation and deprotonation. Synthesis of functional benzofurans directly starting
新型的高功能苯并呋喃,苯并噻吩和吲哚的制备是通过分子内Wittig反应与相应的酯,硫酯和酰胺官能团实现的。关键的中间体,磷酰亚磷,大概是由于向醛中添加了Bu 3 P,然后进行了酰化和去质子化作用所致。还开发了由水杨醛衍生物与酰氯直接以一步法合成功能性苯并呋喃的方法。