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Pd-catalyzed Negishi coupling of pyrazole triflates with alkyl zinc halides
Authors:Ting Zhang  Xiaodi GaoHarold B Wood
Institution:a Department of Medicinal Chemistry, Merck Research Laboratories, Merck & Co., Inc., PO Box 2000, Rahway, NJ 07065, USA
b Merck Summer Research Intern, University of Michigan, Ann Arbor, MI, USA
Abstract:A mild, functional group tolerant palladium-catalyzed Negishi coupling of pyrazole triflates and nonaflates with alkyl, benzyl, and aryl zinc halides has been developed. It allows quick access to 3-substituted pyrazole analogs at late stage via common synthetic intermediates.
Keywords:Negishi coupling  Cross-coupling  Palladium catalysis  Pyrazole triflates  Organozinc reagents  Analog synthesis
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