Aerobic Copper-Catalyzed O-Methylation with Methylboronic Acid
Clare E. Jacobson, Noelia Martinez-Muņoz and David J. Gorin*
*Department of Chemistry, Smith College, 100 Green Street, Northampton, Massachusetts 01063, United States, Email: dgorinsmith.edu
C. E. Jacobson, N. Martinez-Muņoz, D. J. Gorin, J. Org. Chem., 2015, 80, 7305-7310.
DOI: 10.1021/acs.joc.5b01077 (free Supporting Information)
A Cu-catalyzed nondecarboxylative methylation of carboxylic acids with methylboronic acid proceeds in air as sole oxidant and offers a strategy for replacing toxic, electrophilic alkylating reagents. An isotope-labeling study supports an oxidative cross-coupling mechanism, in analogy to that proposed for Chan-Lam arylation.
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Y. Ji, J. Sweeney, J. Zoglio, D. J. Gorin, J. Org. Chem., 2013, 78, 11606-11611.