106271-25-4Relevant academic research and scientific papers
Synthesis of Cyclic Azomethine Imines by Cycloaddition Reactions of N-Isocyanates and N-Isothiocyanates
Bongers, Amanda,Ranasinghe, Indee,Lemire, Philippe,Perozzo, Alyssa,Vincent-Rocan, Jean-Fran?ois,Beauchemin, André M.
supporting information, p. 3778 - 3781 (2016/08/16)
Various nitrogen-substituted iso(thio)cyanates engage in [3 + 2]-cycloaddition reactions to form azomethine imines containing triazolone, triazole-thione, and pyrazole-thione cores. First, iminoisothiocyanates are shown to undergo aminothiocarbonylation reactions with strained alkenes, and a comparison with recently reported reactions of iminoisocyanates highlights their reduced reactivity. In contrast, amino(thio)carbonylation reactions of imines with iminoisocyanates and iminoisothiocyanates proved more efficient, providing access to triazolone and triazole-thione cores. The dipole products can be converted to valuable heterocyclic cores through simple derivatization reactions.
Cyclization of 4-phenylthiosemicarbazide with phenacylbromide revisited. Formation of 1,3,4-thiadiazines and of isomeric 1,3-thiazoles
Pfeiffer, Wolf-Diethard,Junghans, Dieter,Saghyan, Ashot S.,Langer, Peter
, p. 1063 - 1067 (2014/08/05)
The cyclization of 4-phenylthiosemicarbazide with phenacylbromide, carried out in refluxing ethanol, afforded 1,3,4-thiadiazine 1 as the major product. In contrast to a previous report, 2-phenylimino-4-phenyl-2,3-dihydro-1,3-thiazol-3- amine (2) and not 2
