First Coupling Reaction of Terminal Alkynes with Sulfur and Selenium Substituted Vinylic Tosylates Catalyzed by Pd(II)
作者:Antonio L. Braga、Daniel J. Emmerich、Claudio C. Silveira、Tales L. C. Martins、Oscar E. D. Rodrigues
DOI:10.1055/s-2001-11407
日期:——
α-Chalcogeno vinyl tosylates undergo direct coupling reactions with terminal alkynes in the presence of palladium (II) in THF/i-Pr2NH at room temperature to give β-chalcogeneno enynes in good yields.
作者:Antonio L. Braga、Oscar E.D. Rodrigues、Elisabete de Avila、Claudio C. Silveira
DOI:10.1016/s0040-4039(98)00531-0
日期:1998.5
Thiolesters were conveniently prepared in good yields by reacting thioacetylenes with p-toluenesulfonic or trifluoracetic acid in dichloromethane in the presence of silica