Pd-Catalyzed Csp<sup>2</sup>H Functionalization of Heteroarenes via Isocyanide Insertion: Concise Synthesis of Di-(Hetero)Aryl Ketones and Di-(Hetero)Aryl Alkylamines
作者:Upendra K. Sharma、Nandini Sharma、Jun Xu、Gonghua Song、Erik V. Van der Eycken
DOI:10.1002/chem.201406562
日期:2015.3.23
We report herein an efficient Pd‐catalyzed direct CH bond functionalization of heteroarenesvia an isocyanideinsertion strategy for the synthesis of di‐(hetero)arylketones and di‐(hetero)arylalkylamines. The methodology involves a three component reaction between an azole, a haloarene and an isocyanide resulting in the formation of an imine, which in turn is either hydrolyzed or reduced to get
Various alpha-keto-1,3,4-oxadiazole derivatives were synthesized through a sequential intermolecular dehydrochlorination/intramolecular aza-Wittig reaction of carboxylic acids and imidoyl chloride intermediates, which were generated by isocyanide-Nef reaction of acyl chlorides and (N-isocyanimine) triphenylphosphorane (1) in CH2Cl2 at room temperature. (C) 2011 Elsevier Ltd. All rights reserved.