B. Kalluraya et al., SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF SOME NITROTHIENYL-TRIAZOLO[3,4-B]-1,3,4-THIDIAZINES, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 34(11), 1995, pp. 939-943
Dehydrobromination of yl-2,3-dibromo-1-(4-nitro-2-thienyl)-propan-1-on
es (2) give aryl-2-bromo-1-(4-nitro-2-thienyl)-2-propen-1-ones (3). Co
ndensation of 3 with 3-substituted-4-amino-5-mercapto-1,2,4-triazoles
(4) using sodium acetate as catalyst yield -thienyl)-1,2,4-triazolo[3,
4-b]-1,3,4-thiadiazines (5). The structures of thiadiazines 5 have bee
n established on the basis of analytical and spectral data. Thiadiazin
es 5 are also synthesized by alternative chemical route.