This work describes the first Pd-catalyzed allylic alkylation of thioamides. Various thioamides were efficiently alpha-allylated in high yields and with excellent selectivity for monoallylation under mild reaction conditions. The process not only provides a facile method for the synthesis of functionalized thioamides, but also presents a useful transformation for synthetically important thioamides. (C) 2013 Elsevier Ltd. All rights reserved.
Mild Method for the Conversion of Amides to Thioamides
作者:André B. Charette、Michel Grenon
DOI:10.1021/jo0344485
日期:2003.7.1
Aqueous ammonium sulfide was found to be an ideal substitute for hydrogen sulfide for the thiolysis of activated amides. High yields of the corresponding thioamides were obtained for a broad range of substrates, using two different procedures that are both operationally simple and inexpensive, as well as amenable to large-scale preparation. Preliminary results indicate that aqueous ammonium sulfide
This work describes the first Pd-catalyzed allylic alkylation of thioamides. Various thioamides were efficiently alpha-allylated in high yields and with excellent selectivity for monoallylation under mild reaction conditions. The process not only provides a facile method for the synthesis of functionalized thioamides, but also presents a useful transformation for synthetically important thioamides. (C) 2013 Elsevier Ltd. All rights reserved.