Light‐Mediated Carboxylation Using Carbon Dioxide

Abstract Carbon dioxide is a green and sustainable one‐carbon source, which could be utilized in the production of various fine chemicals. In recent studies, the light‐mediated carboxylation employing CO 2 has received considerable attention. The photocarboxylation of substrates with CO 2 to build novel C−C bonds is introduced in this Minireview. The article is arranged based on the light‐driven reactive intermediates, including CO 2 radical anion, substrate radical anions, carbanions, and M−C species. Most of the cases are under the topic of photoredox catalysis, with single electron transfer as the main driving force. Some non‐catalytic examples are also discussed to provide more mechanistic insights.