Direct oxidative phosphonylation of amines under metal-free conditions

Direct oxidation coupling of tertiary amines and dialkyl- or diphenyl-substituted phosphonates was developed. The reaction was mediated by DDQ under room temperature. Various phosphonates and N-aryl tetrahydroisoquinolines were tolerated in this reaction, and alpha-aminophosphonates were obtained with up to 99% yield. (C) 2011 Elsevier Ltd. All rights reserved.