40784-02-9Relevant academic research and scientific papers
Reactions of 5-diazoimidazoles with steroid hydrazones
Sadchikova,Kureneva,Shtokareva,Selezneva
, p. 1470 - 1476 (2007/10/03)
The reaction of 5-diazoimidazoles with steroid hydrazones was studied. The structure of the steroid derivative was found to have a significant effect on the direction of the nitrogen transfer in the unstable intermediate tetrazene. The presence of a labile proton in the reaction mixture permits stabilization of one of the tetrazene forms such that only direction was found for the nitrogen transfer in all the reactions studied, leading to imidazole azides and iminosteroid derivatives.
Antitumour Imidazotetrazines. Part 12. Reactions of Mitozolomide and its 3-Alkyl Congeners with Oxygen, Nitrogen, Halogen, and Carbon Nucleophiles
Baig, Ghouse Unissa,Stevens, Malcolm F. G.
, p. 665 - 670 (2007/10/02)
Mitozolomide (1) and its 3-alkyl congeners ring-open in aqueous sodium carbonate to form 5-(3-alkyltriazen-1-yl)imidazole-4-carboxamides.The 3-methyl and 3-ethyl analogues of mitozolomide decompose in alcohols to form 2-azahypoxanthine and 5-amino-1-alkoxycarbonylimidazole-4-carboxamides.In hydrazine hydrate mitozolomide yields, principally, 5-azidoimidazole-4-carboxamide, whereas the 3-alkyl-derivatives form 5-amino-4-carbamoylimidazole-1-carbohydrazide. 5-Diazoimidazole-4-carboxamide, generated by thermolysis of mitozolomide in acetic acid or pyridine, can be trapped by reactive methylenic ketones, nitriles or esters to afford imidazotriazines.
