Reaction of aliphatic olefins with synthesis gas and hydrazines in the presence of rhodium phosphine catalysts leads directly to the corresponding hydrazones. Applying Iphos as ligand good to excellent yields and high chemo- and regioselectivities were obtained in toluene under mild conditions. In case of aromatic hydrazines in situ Fischer indole synthesis can be combined with the new hydrazone preparation
A facile access to substituted indoles utilizing palladium catalyzed annulation under microwave enhanced conditions
作者:Ranjith P. Karuvalam、Karickal R. Haridas、Ayyiliath M. Sajith、Arayambath Muralidharan
DOI:10.1016/j.tetlet.2013.07.073
日期:2013.9
A facile access to differently substituted indoles using palladium catalyzed annulation reactions under microwave enhanced conditions has been achieved. A highly active and efficient catalytic system PdCl2/(A-taphos) for the synthesis of indole via palladium catalyzed ring annulation of ortho iodo anilines and aldehydes has been developed. (C) 2013 Elsevier Ltd. All rights reserved.