A new facile synthetic method for the construction of 1,3-oxathiolan-2-ylidenes
作者:Harisadhan Ghosh、C.B. Singh、Siva Murru、Veerababurao Kavala、Bhisma K. Patel
DOI:10.1016/j.tetlet.2008.02.103
日期:2008.4
A new, convenient and efficient syntheticmethod for the construction of 1,3-oxathiolan-2-ylidenes via sodium borohydride reduction of the addition product of dithiocarbamic acid esters with α-bromoketones under basic conditions is reported. This method is general and applicable to a range of systems.
Synthesis of symmetricalsubstituted 2,5‐diamino‐1,3,4‐thiadiazoles is described. Reaction of easily prepared dithiocarbamates with hydrazine gives the corresponding thiadiazoles in moderate to good yields. This method is new, efficient, and simple especially in the work‐up procedure.