New Methods and Reagents in Organic Synthesis. 59. Lithium Trimethylsilydiazomethane: A New Synthon for the Preparation of 5-Substituted 1,2,3-Thiadiazoles
New Methods and Reagents in Organic Synthesis. 59. Lithium Trimethylsilydiazomethane: A New Synthon for the Preparation of 5-Substituted 1,2,3-Thiadiazoles
作者:Toyohiko Aoyama、Yuji Iwamoto、Takayuki Shioiri
DOI:10.3987/r-1986-03-0589
日期:——
Base-Catalyzed Transesterification of Thionoesters
作者:Josiah J. Newton、Robert Britton、Chadron M. Friesen
DOI:10.1021/acs.joc.8b02260
日期:2018.10.19
Here we report a convenient synthesis of thionoesters by base-catalyzed transesterification. Benzyl and alkyl thionobenzoates and thionoheterobenzoates were efficiently prepared using various alcohols catalyzed by the corresponding sodium alkoxide. This methodology features a broad substrate scope, good to excellent yields, short reaction times, while simultaneously driving the reaction toward completion