Recent advances in catalytic decarboxylative transformations of carboxylic acid groups attached to a non-aromatic sp<sup>2</sup>or sp carbon
Ajijur Rahaman, Shivani Singh Chauhan, Sukalyan Bhadra
Abstract
chemo- and regioselectively. Within the last two decades, the area of catalytic decarboxylative transformations has expanded significantly by utilizing various classes of carboxylic acids as the substrate, including (hetero)aromatic acids, alkyl acids, α-keto acids, α,β-unsaturated acids and alkynoic acids. A literature survey reveals that compared to aromatic acids, the number of original research papers on decarboxylative reactions of α-keto acids, α,β-unsaturated acids and alkynoic acids has been rising every year lately, particularly within past five to six years. The prime aim of the current review is to give an overview of the decarboxylative transformations of α-keto acids, α,β-unsaturated acids and alkynoic acids that have been developed since 2017. The article focuses on the decarboxylative functionalizations that occur in the presence or absence of transition metal catalysts and/or under photoredox catalysis.