98664-16-5Relevant academic research and scientific papers
Synthesis of Some New 2-Imino-2,3-dihydro-1,3,4-thiadiazole and Selenadiazole Derivatives
Abdelhamid, Abdou Osman,Shawali, A. S.
, p. 613 - 616 (2007/10/02)
Diazotized 3(5)-amino-5(3)-phenylpyrazole (2) reacts with phenacylthiocyanate (1) and phenacylselenocyanate (10) to give the corresponding 1,3,4-thiadiazoline derivative (5) and 1,3,4-selenadiazoline derivative (12), respectively.A mechanism is proposed and it is substantiated by an alternate synthesis of 5 and 12 from the corresponding hydrazidoyl bromide (6) with potassium thiocyanate and potassium selenocyanate, respectively.The thiadiazoline (5) and selenadiazoline (12) give the respective N-acyl derivatives (7a) and (12) with acetic anhydride.Nitrosation of 5 and 12 gives the corresponding N-nitroso-derivatives (8a) and (14), respectively.Cyclization of 6 gives the corresponding 9 with triethylamine in benzene. - 2-Imino-2,3-dihydro-1,3,4-thiadiazole, Selenadiazole Derivatives
The Structure of the Diazonium Coupling Products of Phenacyl Thiocyanate and Phenacyl Selenocyanate with Diazotized 3-Phenyl-5-Aminopyrazole
Farag, Ahmad M.,Fahmi, Abdelgawad A.,Abdelhamid, Abdou O.,Shawali, Ahmad S.,Algharib, Mohamed S.
, p. 1341 - 1344 (2007/10/02)
The reaction of diazotized 3-phenyl-5-aminopyrazole with phenacyl thiocyanate 1a and phenacyl selenocyanate 1b afforded directly 2-imino-3-(3-phenyl-5-pyrazolyl)-5-benzoyl-2,3-dihydro-1,3,4-thiadiazole monohydrate 9a and 2-imino-3-(3-phenyl-5-pyrazolyl)-5
