161891-02-7Relevant academic research and scientific papers
A FACILE, ONE-POT SYNTHESIS OF NOVEL 2,2'-BI(4,5-DIHYDRO-1,3,4-SELENADIAZOLE) DERIVATIVES VIA DIHYDRAZONOYL DIHALIDES
Farag, Ahmad M.,Kandeel, Zaghloul E.,Dawood, Kamal M.,Algharib, Mohamad S.
, p. 129 - 136 (2007/10/02)
N,N'-Diaryloxalodihydrazonoyldichlorides 1 react with potassium selenocyanate (or selenourea), in ethanol, leading to the formation of the hitherto unreported 2,2'-bi(4-aryl-4,5-dihydro-5-imino-1,3,4-selenadiazoles) 3 in good yields.Compounds 3 undergo nitrosation, acetylation and benzoylation to afford the N-nitroso, N-acetyl and N-benzoyl derivatives 6, 8 and 9, respectively.Thermolysis of 6 afforded the corresponding 2,2'-biselenadiazol-5-ones 7 in high yields.The latter products were also obtained directly from acid hydrolysis of 3.Compounds 8 and 9 werealternatively prepared, in one step, from the reaction of 1 with N-acetyl-N'-phenylselenourea and benzoylselenourea, respectively.Key words: Diaryloxadihydrazonoyl dihalides, 2,2'-biselenadiazoles.
