Palladium-Catalyzed Approach for the General Synthesis of (<i>E</i>)-2-Arylmethylidene-<i>N</i>-tosylindolines and (<i>E</i>)-2-Arylmethylidene-<i>N</i>-tosyl/nosyltetrahydroquinolines: Access to 2-Substituted Indoles and Quinolines
A facile and efficient method for the synthesis of (E)-2-arylmethylidene-N-tosylindolines and (E)-2-arylmethylidene-N-tosyl/nosyltetrahydroquinoline variants has been developed throughpalladium-catalyzed cyclocondensation of aryl iodides with readily available 1-(2-tosylaminophenyl)prop-2-yn-1-ols and their higher homologues, respectively. The proposed reaction mechanism invokes the operation of