Esterification of N-protected .alpha.-amino acids with alcohol/carbodiimide/4-(dimethylamino)pyridine. Racemization of aspartic and glutamic acid derivatives
作者:Madhup K. Dhaon、Richard K. Olsen、K. Ramasamy
DOI:10.1021/jo00349a028
日期:1982.5
Synthesis of Thioesters by Simultaneous Activation of Carboxylic Acids and Alcohols Using PPh<sub>3</sub>/NBS with Benzyltriethylammonium Tetrathiomolybdate as the Sulfur Transfer Reagent
A new and simple route for the synthesis of thioesters starting from carboxylicacids and alcohols is reported by usingtetrathiomolybdate as the key sulfurtransferreagent. Triphenylphosphane and N-bromosuccinimide were used for the activation of the carboxylicacid and alcohol in the same pot followed by the transfer of sulfur from tetrathiomolybdate. Thioesters were obtained in good to moderate