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
Direct Oxidative C-P Bond Formation of Indoles with Dialkyl Phosphites
作者:Boshun Wan、Haolong Wang、Xincheng Li、Fan Wu
DOI:10.1055/s-0031-1289700
日期:2012.3
The direct phosphonation of indoles was developed. In this reaction, dialkyl phosphites and indoles were used as substrates, and the C-P bond was formed through oxidative coupling mediated by silver(I) acetate. Various indoles and different dialkyl phosphites were effective substrates for the reaction, and dialkylphosphoryl-substituted indoles were obtained in up to 71% yield.
An expedient synthesis of pyrrole-2-phosphonates via direct oxidative phosphorylation and γ-hydroxy-γ-butyrolactams from pyrroles
作者:Se Hee Kim、Ko Hoon Kim、Jin Woo Lim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2013.11.082
日期:2014.1
An expedient oxidative phosphorylation of pyrroles has been disclosed. The reaction of dialkyl phosphite and pyrrole in the presence of AgNO3/K2S2O8 in DMF/H2O (8:1) produced pyrrole-2-phosphonates in good yields. In the absence of dialkyl phosphite, gamma-hydroxy-gamma-butyrolactam derivative was formed as a major product. (C) 2013 Elsevier Ltd. All rights reserved.