报道了末端炔烃的立体选择性且环境友好的硫醇化。二硫化秋兰姆试剂(二硫化四甲基秋兰姆和二硫化四乙基秋兰姆)与炔烃在二甲亚砜(DMSO)/H 2 O中反应可以以良好的收率(高达88%)得到( Z )-乙烯基硫醚。该方案具有底物范围广、立体选择性好、原子经济性高、收率好、不含过渡金属等特点。机理研究表明,水和DMSO作为氢源,这极大地凸显了这种涉及两个氢原子供体的特殊反应的独特反应性。
Transition metal-free addition of dithiocarbamates to alkynes: one-pot regioselective synthesis of S-vinyl dithiocarbamates under solvent-free conditions
作者:Fezzeh Aryanasab、Mohammad Reza Saidi
DOI:10.1007/s00706-013-1112-6
日期:2014.3
A convenient, green, and efficient procedure for the synthesis of S-vinyl dithiocarbamates by a simple one-pot three-component condensation of an amine, carbon disulfide, and alkynes is described in the absence of any transition metal catalyst and under solvent-free conditions. This clean and improved method selectively furnishes the corresponding (Z)-S-vinyl dithiocarbamates in good to excellent yields. The reaction is clean with simple product workup and is carried out at 80 A degrees C.