Palladium/Imidazolium salt as a versatile catalyst for sequential coupling reactions of aryl dihalides to unsymmetrically substituted arenes
摘要:
A simple method for one-pot sequential Heck/Suzuki Coupling reactions of a range of substituted aryl dihalides has been described The Pd(OAc)(2)/imidazolium system catalyzed double coupling reactions proceed Without isolation of the intermediates giving unsymmetrically polysubstituted biphenyls ill good to excel lent yields Further couplings of the resultant products bearing additional C-Cl bonds with substituted arylboronic acids or amines lead to unsymmetrical terphenyls and aminobiphenyl derivatives (C) 2009 Elsevier Ltd All rights reserved