Switchable Copper-Catalyzed Cascade Synthesis of Thiazolidine-2-thiones and Thiazole-2(3H)-thiones
摘要:
A novel copper-catalyzed cascade synthesis of thiazolidine-2-thiones from N-(2-bromoallyl) amines and carbon disulfide has been developed. The procedure combines carbamodithioic acid formation and copper-catalyzed intramolecular S-vinylation in one sequence. By elevating the temperature, the one-pot reaction efficiently affords thiazole-2(3H)-thiones in moderate to good yields.
Switchable Copper-Catalyzed Cascade Synthesis of Thiazolidine-2-thiones and Thiazole-2(3H)-thiones
摘要:
A novel copper-catalyzed cascade synthesis of thiazolidine-2-thiones from N-(2-bromoallyl) amines and carbon disulfide has been developed. The procedure combines carbamodithioic acid formation and copper-catalyzed intramolecular S-vinylation in one sequence. By elevating the temperature, the one-pot reaction efficiently affords thiazole-2(3H)-thiones in moderate to good yields.
Basic ion-exchangeresins, one kind of polystyryl-supported tertiary amine, were demonstrated to be highly efficient and recyclable catalysts for the fixation of carbon dioxide with aziridines under mild conditions, leading to the formation of 5-aryl-2-oxazolidinone with excellent regio-selectivities. Notably, neither solvents nor any additives were required, and the catalyst could be recovered by
Transition-Metal-Catalyzed Reactions of Propargylamine with Carbon Dioxide and Carbon Disulfide
作者:Min Shi、Yu-Mei Shen
DOI:10.1021/jo0014966
日期:2002.1.1
The reactions of propargylamine derivatives with carbondioxide and carbondisulfide have been systematically examined in the presence of transition-metal catalysts. Pd(OAc)(2) is the best catalyst for the formation of the corresponding oxazolidinones. In addition, we found that, in the reaction of propargylamine with carbondioxide catalyzed by palladium(0) metal catalyst in toluene, both oxazolidinone