3-Iodo-4-chalcogen-2H-benzopyran derivatives underwent a direct Sonogashira cross-coupling reaction with several terminal alkynes in the presence of a catalytic amount of Pd(PPh3)2Cl2 with CuI as a co-catalyst, using Et3N as base and solvent. This cross-coupling reaction proceeded cleanly under mild conditions and was performed with propargylic alcohols, propargylic ethers, as well as alkyl and aryl
在使用催化量的Pd(PPh 3)2 Cl 2和CuI作为助催化剂的情况下,将3-Iodo-4-chalcogen-2 H-苯并
吡喃衍
生物与数个末端
炔烃直接进行Sonogashira交叉偶联反应,使用Et 3 N作为碱和溶剂。这种交叉偶联反应在温和的条件下进行清洁,并用炔
丙醇,炔丙基
醚类,以及烷基和芳基炔执行,家具对应的3-炔基-4-
硫属-2 ħ -benzopyrans以良好的收率。