Highly Chemo- and Regioselective Thiocarbonylation of Conjugated Enynes with Thiols and Carbon Monoxide Catalyzed by Palladium Complexes: An Efficient and Atom-Economical Access to 2-(Phenylthiocarbonyl)-1,3-dienes
作者:Wen-Jing Xiao、Giuseppe Vasapollo、Howard Alper
DOI:10.1021/jo9824246
日期:1999.3.1
3-conjugated enynes bearing a terminal triple bond with thiols and carbon monoxide in the presence of catalytic quantities of Pd(OAc)(2) (3 mol %) and 1,3-bis(diphenylphosphino)propane (6 mol %) in THF at 110 degrees C gave 2-(phenylthiocarbonyl)-1,3-dienes in moderate to good yields. The thiocarbonylation takes place with high chemo- and regioselectivity, with the attack by the phenylthiocarbonyl group occurring
在催化量的Pd(OAc)(2)(3 mol%)和1,3-双(二苯基膦基)丙烷存在下,带有末端三键的1,3-共轭烯与硫醇和一氧化碳的反应(6在110℃下,在THF中得到1摩尔%的2-(苯基硫代羰基)-1,3-二烯,产率中等至良好。硫羰基化反应具有很高的化学和区域选择性,苯硫羰基的攻击只发生在1,3-共轭烯炔的碳2上。