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
硫代乙炔与对甲苯磺酸或三氟乙酸在二氧化硅存在下于二氯甲烷中反应可方便地以高收率制备硫酯
Stereoselective Synthesis of (<i>Z</i>)-<i>α</i>-Organothiovinyltosylates and their Application in the Synthesis of Highly Functionalized Vinylic Sulfides
作者:Antonio L. Braga、Daniel J. Emmerich、Claudio C. Silveira、Tales L. C. Martins、Oscar E. D. Rodrigues
DOI:10.1055/s-2001-11406
日期:——
Thioacetylenes 1 afford, upon treatment with p-toluenesulfonic acid in dichloromethane, (O,S)-ketene acetals 2 which can act as useful α-(organothio)vinyl carbocation equivalents, opening a novel route to functionalized vinylic sulfides.