New domino approach for the synthesis of 2,3-disubstituted benzo[b]furans via copper-catalyzed multi-component coupling reactions followed by cyclization
作者:Hongfeng Li、Jun Liu、Bin Yan、Yanzhong Li
DOI:10.1016/j.tetlet.2009.02.204
日期:2009.5
An efficient domino process for the construction of 2,3-disubstituted benzo[b]furans has been developed viacopper-catalyzedthree-componentcouplingreactions of salicylaldehydes, amines, and alkynes followed by base-assisted O-annulation reaction.
通过铜催化的水杨醛,胺和炔烃的三组分偶联反应,然后进行碱辅助的O型环化反应,已经开发出了一种高效的多米诺方法,用于构建2,3-二取代的苯并[ b ]呋喃。
Facile and efficient synthesis of polyfunctionalized benzofurans: three-component coupling reactions from an alkynylsilane, an o-hydroxybenzaldehyde derivative, and a secondary amine by a Cu(I)–Cu(II) cooperative catalytic system
作者:Norio Sakai、Naoki Uchida、Takeo Konakahara
DOI:10.1016/j.tetlet.2008.03.111
日期:2008.5
DMAP effectively catalyzed a three-component coupling reaction involving an alkynylsilane, an o-hydroxybenzaldehyde derivative, and a secondary amine. The reaction proceeded via intramolecular 5-exo-dig cyclization, resulting in direct synthesis of the corresponding benzofuranderivatives in moderate to excellent yields.