Hassan, Alaa A. published the artcilePyrazole, pyrazolo[1,2-c]-1,3,4-thiadiazole and thiadiazepine derivatives from thiosemicarbazides, COA of Formula: C5H3N5, the main research area is thiosemicarbazide tetracyanoethene cyclization; pyrazole derivative preparation; pyrazolothiadiazole derivative preparation; thiadiazepine derivative preparation.
Thiosemicarbazides RNHCSNHNH2 [R = Ph, Bn, allyl] reacted with tetracyanoethene in Et acetate with admission of air to form the 7-amino-2-organylimino-2,3-dihydro-1,3,4-thiadiazepine-5,6-dicarbonitriles I [ R = Ph, Bn], 7-amino-1-organylimino-3-oxopyrazolo[1,2-c]-1,3,4-thiadiazole-5,5,6-tricarbonitriles II, 7-amino-1-organyl-iminopyrazolo[1,2-c]-1,3,4-thiadiazole-3,3,5,5,6-pentacarbonitriles III and 3-amino-1H-pyrazole-4,5-dicarbonitrile (IV) in moderate yields. Rationales for the observed conversations are presented.
ARKIVOC (Gainesville, FL, United States) published new progress about Cyclization. 54385-49-8 belongs to class pyrazoles-derivatives, name is 5-Amino-1H-pyrazole-3,4-dicarbonitrile, and the molecular formula is C5H3N5, COA of Formula: C5H3N5.
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics