Regioselective Oxidative C-H Phosphonation of Imidazo[1,2-<i>a</i>]pyridines and Related Heteroarenes Mediated by Manganese(III) Acetate
作者:Mahipal Yadav、Saidulu Dara、Varma Saikam、Mukesh Kumar、Sravan Kumar Aithagani、Satya Paul、Ram A. Vishwakarma、Parvinder Pal Singh
DOI:10.1002/ejoc.201500984
日期:2015.9
Herein, we report a MnIII-mediated regioselective method for the direct C–Hphosphonation of imidazo[1,2-a]pyridines by using dialkyl phosphites. 3-Phosphonated imidazo[1,2-a]pyridines are synthesized in good to excellent yields under the optimized reaction conditions. The present method is also applicable to the functionalization of relatedheteroarenes, and unlike previously reported methods, the
The site‐selective functionalization of biologically important nitrogen‐containingheterocycles and related derivatives remains a challenging and important task. We report herein on the direct regiodivergent N1/C2 phosphorylation of free indole derivatives. Cyclic voltammograms and EPR data indicate that by utilizing different electrolyte‐mediated anodic oxidation to generate different active indole