Rhodium-catalysed additive-free alkoxycarbonylation of indoles: 2,4,6-trimethylbenzoic acid-based carbonate anhydrides as a versatile alkoxycarboxyl source
Hirotsugu Suzuki,
Yuki Ito,
Kentaro Yabe
et al.
Abstract:We report a CO-free approach to indole-2-carboxylic esters: rhodium-catalysed C(2)-alkoxycarbonylation of indoles with 2,4,6-trimethylbenzoic acid-based carbonate anhydrides. Selective C–O bond cleavage of the anhydrides facilitates the introduction of various alkoxycarbonyl...
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