Access to 2,3-Disubstituted Benzofurans through One-Pot Acid-Catalyzed Nucleophilic Substitution/TBAF-Mediated Oxacycloisomerization
作者:Chada Raji Reddy、Gaddam Krishna、Nerella Kavitha、Bellamkonda Latha、Dong-Soo Shin
DOI:10.1002/ejoc.201200708
日期:2012.9
synthetic strategy for the synthesis of diversely 2,3-disubstituted benzofurans is described. This method is based on the use of propargylic alcohols generated from TBS-protected ortho-hydroxy benzaldehydes as starting materials and allows a library of 2,3-disubstituted benzofurans to be built. The procedure consists of one-pot nucleophilic substitution, TBS-deprotection, and exo-dig cycloisomerization
描述了一种用于合成多种 2,3-二取代苯并呋喃的有效合成策略。该方法基于使用由 TBS 保护的邻羟基苯甲醛生成的炔丙醇作为起始材料,并允许构建 2,3-二取代苯并呋喃库。该过程包括一锅亲核取代、TBS 脱保护和外环异构化。