A green-chemistry approach for the efficient synthesis of triazolo benzoxazepines or triazolo benzodiazepines in aqueous micellar system
作者:Rammyani Pal、Swarbhanu Sarkar、Nivedita Chatterjee、Asish Kumar Sen
DOI:10.1016/j.tetlet.2014.01.047
日期:2014.2
A convenient route for the synthesis of triazole fused benzoxazepines or benzodiazepines in aqueous micellar medium has been described. The two step one-pot synthesis involves Sonogashira reaction of prop-2-ynyl 2-azidobenzoates and aryl iodides followed by intramolecular azide–alkyne cyclization using Pd(CH3CN)2Cl2 as catalyst and ethanedial,1,2-bis(2-methyl-2-phenylhydrazone) as ligand, under atmospheric
An expedient and facile route for the general synthesis of 3-aryl substituted 1,2,3-triazolo[1,5-a][1,4]benzodiazepin-6-ones and 1,2,3-triazolo[1,5-a][1,5]benzodiazocin-7-ones
We describe herein a convenient approach for the general synthesis of novel tricyclic scaffolds incorporating a fusion of the 1,2,3-triazole ring with difficultly obtainable medium sized rings such as [1,4]benzodiazepin-5-ones and [1,5]benzodiazocin-6-ones through Sonogashira coupling of an aryl iodide with 2-amino-N-methyl-N-(prop-2-ynyl)benzamide or homologue followed by in situ diazotisation, azidation