Synthesis of 3-Alkynylselenophene Derivatives by a Copper-Free Sonogashira Cross-Coupling Reaction
作者:Diego Alves、Joel S. dos Reis、Cristiane Luchese、Cristina W. Nogueira、Gilson Zeni
DOI:10.1002/ejoc.200700707
日期:2008.1
3-Iodoselenophene derivatives undergo direct Sonogashiracross-couplingreactions with several terminal alkynes in the presence of a catalytic amount of Pd(PPh3)2Cl2 in DMF with Et3N as the base under cocatalyst-free conditions. This cross-couplingreaction proceeded cleanly under mild conditions and was performed with propargylic alcohols and propargylic ethers, as well as alkyl, vinyl and aryl alkynes