3-Iodoselenophene derivatives: a versatile substrate for Negishi cross-coupling reaction
作者:Ricardo F. Schumacher、Diego Alves、Ricardo Brandão、Cristina W. Nogueira、Gilson Zeni
DOI:10.1016/j.tetlet.2007.11.070
日期:2008.1
3-Iodoselenophene derivatives undergo a direct Negishi cross-coupling reaction with several organozinc compounds in the presence of a catalytic amount of Pd(PPh3)4 in THF at roomtemperature. This cross-coupling reaction proceeded cleanly under mild conditions and permitted the formation of polyaromatic compounds in good yields.
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