Cross‐Coupling of α‐Carbonyl Sulfoxonium Ylides with C−H Bonds. (14th September 2017)

• Record Type: Journal Article
• Authors: Barday, Manuel; Janot, Christopher; Halcovitch, Nathan R.; Muir, James; Aïssa, Christophe
• Is Part Of: Angewandte Chemie. Volume 129:Number 42(2017)
• Page Start: 13297
• Page End: 13301
• Publication Date: 2017-09-14
• Subjects: C-H-Aktivierung -- Homogene Katalyse -- Rhodium -- Schwefel -- Ylide; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201706804
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The functionalization of carbon–hydrogen bonds in non‐nucleophilic substrates using α‐carbonyl sulfoxonium ylides has not been so far investigated, despite the potential safety advantages that such reagents would provide over either diazo compounds or their in situ precursors. Described herein are the cross‐coupling reactions of sulfoxonium ylides with C(sp 2 )−H bonds of arenes and heteroarenes in the presence of a rhodium catalyst. The reaction proceeds by a succession of C−H activation, migratory insertion of the ylide into the carbon–metal bond, and protodemetalation, the last step being turnover‐limiting. The method is applied to the synthesis of benz[c]acridines when allied to an iridium‐catalyzed dehydrative cyclization.