我们报告了一种新的电化学无负载电解质方法,用于通过草酸氧化合成尿素、氨基甲酸酯和硫代氨基甲酸酯。这种简单、实用且无光气的路线包括在有机碱存在下通过草酸的阳极脱羧原位生成异氰酸酯中间体,然后一锅加入合适的亲核试剂以提供相应的尿素,氨基甲酸酯和硫代氨基甲酸酯。此程序适用于不同的胺、醇和硫醇。此外,当使用单程连续电化学流动条件并且该反应在碳石墨 C gr /C gr 在流动池中,可以在 6 分钟的停留时间内以高产率获得尿素化合物,解锁在批量条件下无法访问的底物,同时易于扩展。
Synthesis of Thiocarbamates from Thiols and Isocyanates Under Catalyst- and Solvent-Free Conditions
作者:Barahman Movassagh、Mohammad Soleiman-Beigi
DOI:10.1007/s00706-007-0762-7
日期:2008.2
A simple and efficient procedure was developed for the synthesis of S -alkyl (aryl) thiocarbamates under solvent-free conditions without the use of a catalyst. The significant features of this protocol are (a) operational simplicity, (b) mild reaction conditions, (c) short reaction times, (d) solvent-free conditions, and (e) high product yields.
One-pot synthesis of carbamates and thiocarbamates from Boc-protected amines
作者:Hee-Kwon Kim、Anna Lee
DOI:10.1016/j.tetlet.2016.09.038
日期:2016.11
A highly efficient one-pot procedure for the synthesis of carbamates and thiocarbamates has been described. In the presence of 2-chloropyridine and trifluoromethanesulfonyl anhydride, the isocyanate intermediates were generated in situ for further reactions with alcohols and thiols to afford the desired carbamates and thiocarbamates in high yields.
Molecular iodine-mediated synthesis of thiocarbamates from thiols, isocyanides and water under metal-free conditions
作者:Wen-Hu Bao、Chao Wu、Jing-Ting Wang、Wen Xia、Ping Chen、Zilong Tang、Xinhua Xu、Wei-Min He
DOI:10.1039/c8ob01820k
日期:——
A metal-free and efficient molecular iodine-mediated protocol has been developed to prepare thiocarbamates from readily available thiols, isocyanides and water.
已开发出一种无金属、高效的分子碘介导的方法,可从易得的硫醇、异氰酸酯和水中制备硫代氨基甲酸酯。
Visible-Light-Enabled Construction of Thiocarbamates from Isocyanides, Thiols, and Water at Room Temperature
作者:Wei Wei、Pengli Bao、Huilan Yue、Sitong Liu、Leilei Wang、Yudong Li、Daoshan Yang
DOI:10.1021/acs.orglett.8b02231
日期:2018.9.7
A convenient visible-light-induced method for the synthesis of thiocarbamates from isocyanides, thiols, and water has been developed under mild reaction conditions. The present protocol offers a cost-effective and operationally straightforward approach to the various thiocarbamates in moderate to good yields by simple use of cheap Rose Bengal as the photocatalyst and water as the reaction reagent as