Abstract 1, 4-Disubstituted thiosemicarbazides 1b–f reacted with ethenetetracarbonitrile (5) in di-methylformamide with formation of 2-substituted 5-phenyl-1, 3, 4-thiadiazoles 2a–f and 2-substituted 5-phenyl-1, 3, 4-oxadiazoles 4a–f. Upon addition of 5 to 1c–e in chlorobenzene, 3-amino-2-benzoyl-4, 5, 5-tri-cyano-2, 5-dihydro-1H-pyrazole-1-[N-(4- tricyanovi-nyl) phenyl] carbothioamide (12), 5-benzylamino-, and 5-allylamino-4-benzoyl- ...
