Efficient and convenient copper-free Pd(OAc)2/Ruphos-catalyzed Sonogashira coupling in the preparation of corfin analogues
作者:Changalaraya Dasaradhan、Yadavalli Suneel Kumar、Kamalakannan Prabakaran、Fazlur-Rahman Nawaz Khan、Euh Duck Jeong、Eun Hyuk Chung
DOI:10.1016/j.tetlet.2014.12.059
日期:2015.2
The Sonogashira coupling reaction of 3-chloro-1H-isochromen-1-one and terminal alkynes, in the presence of catalytic system-Pd(OAc)(2)/Ruphos, Et3N base, and tetrahydrofuran solvent under aqueous conditions, provided novel 3-(alkynyI)-1H-isochromen-1-ones in excellent yields. The methodology has also been extended toward natural isochromen-1-ones corfin analogues. (C) 2014 Elsevier Ltd. All rights reserved.