A. Shafiee et al., Selenium heterocycles. XLIII [1]. Syntheses of 3,5-diaryl-1,2,4-thiadiazoles and 3,5-diaryl-1,2,4-selenadiazoles, J HETERO CH, 36(4), 1999, pp. 901-903
Starting from readily available alpha-arylsulfonyl-alpha-bromoacetophenones
2 a series of 3,5-diaryl-1,2,4-thiadiazoles and 3,5-diaryl-1,2,4-selenadia
zoles were prepared in moderate yield. Reaction of compounds 2 with thioure
a or selenourea gave 2-amino-5-arylsulfonyl-4-phenylthiazole or selenazole
in good yield.