Synthesis of 3,5-Disubstituted-1,2,4-thiadiazoles via NaH–DMF-Promoted Dehydrogenative Intramolecular N–S Bond Formation
作者:Mary Antony P.、Jeevan Chakravarthy A. S.、Hiriyakkanavar Ila
DOI:10.1021/acs.joc.3c02591
日期:2024.4.5
A facile transition-metal-free synthesis of 3,5-bis(het)aryl/arylaminothiadiazoles has been reported. The overall protocol involves base-mediated tandem thioacylation of amidines with dithioesters or aryl isothiocyanates in DMF solvent and subsequent in situ intramolecular dehydrogenative N–S bond formation of thioacylamidine intermediates under an inert atmosphere. A probable mechanism involving a