Bromoaroylmethylidenephosphoranes 3 are reacted with aryl- and hetarylboronic acids under Suzuki–Kumada conditions to yield biaryl- and arylhetaryl-carbonylmethylidenephosphoranes 4. The reaction can also be run in a one-step procedure from (bromoaroylmethyl)triphenylphosphonium bromides 2. 4 are air-stable phosphoranes that undergo Wittig olefination reactions with aldehydes under benzoic acid catalysis.
T. Thiemann, K. Umeno, D. Ohira, E. Inohae, T. Sawada and S. Mataka, New J. Chem., 1999, 23, 1067 DOI: 10.1039/A907470H
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