Oxidative carbonylation of N-protected indoles by Rh(iii)-zeolites

Abstract

The oxidative carbonylation of N-protected indoles was investigated to directly synthesize indole-3-carboxylic acids. Using Rh(III)-zeolites as heterogeneous catalysts, the single-site Rh-species reach unprecedented activities (> 100 turnovers), while the metal...

Visible-light-driven photocatalytic carboxylation to aromatic carboxylic acids with CO2

“…However, these traditional methods suffer from disadvantages such as environmental pollution, harsh reaction conditions, or high energy-consumption. Examples include CO oxidative carbonylation [8][9][10] and carboxylation of aryl compounds with CO 2 , 11,12 formic acid and its derivatives, [13][14][15][16] tetrachloromethane, [17][18][19] carbonyls of transition metals, 20,21 di-tert-butyl dicarbonate, 22 alkyl metal carbonates, 23 silacarboxylic acid, 24 etc. CO 2 is an abundant, nontoxic, nonflammable, and renewable gas that influences the global warming.…”