Selenated NHC-Pd(II) catalyzed Suzuki-Miyaura coupling of ferrocene substituted beta-chloro-cinnamaldehydes, acrylonitriles and malononitriles for the synthesis of novel ferrocene derivatives and their solvatochromic studies

摘要

Suzuki-Miyaura coupling reaction between ferrocenyl/phenyl derivatives of (2-formyl-1-chlorovinyl) ferrocene, 3-chloro-3-ferrocenylacrylonitrile and (3-chloro-3-ferrocenylallylidene)malononitrile and aryl-boronic acid in the catalytic presence of a selenated NHC-Pd(II) full pincer complex was accomplished. Significantly, the couplings take place in water under normal atmospheric conditions, in contrast to many earlier reported Pd-catalysed reactions requiring inert atmosphere conditions. Solvatochromic studies of new ferrocene compounds revealed some interesting changes. Aggregation studies showed an increase of the absorbance with decrease of water content in the water/DMSO solvent mixture.