O,S-Dimethyl Carbonodithioate as a Phosgene Substitute for the Preparation of S-Methyl Alkylcarbamothioates and Dialkylcarbamothioates
作者:Rita Fochi、Iacopo Degani、Claudio Magistris
DOI:10.1055/s-0029-1218117
日期:2009.11
conditions for the synthesis of S-methyl dialkylcarbamothioates involved a one-step procedure in a solvent-free system in the presence of triethyl(methyl)ammonium methyl carbonate as a catalyst; yields of the pure products were 85-98%. A mechanism is proposed for the carbamothioate-formation reaction. O,S-dimethyl carbonodithioate - carbamothioates - carbonylation - isomerization - S,S-dimethyl carbonodithioate
ø,小号二甲基carbonodithioate提出作为能够用作用于在光气的合成的替代的合适和安全地处理试剂小号甲基烷基-和dialkylcarbamo-thioates。前者通过两步法获得,也可以一锅法进行而无需分离中间体O-甲基烷基氨基甲酸酯。纯的S-甲基烷基氨基甲硫醇酯的总产率为94-98%。合成S-甲基的最佳条件 氨基甲酸二烷基氨基甲酸酯在无溶剂的系统中以碳酸三乙基(甲基)铵为催化剂的一步法;纯产物的产率为85-98%。提出了氨基甲酸酯形成反应的机理。 O,S-二甲基碳二硫酸酯-氨基甲酸酯-羰基化-异构化-S,S-二甲基碳二硫酸酯