Abstract
Allylic alcohols and their derivatives are readily available organic compounds that are frequently employed in organic synthesis. These allylic substrates add oxidatively to transition metals to form π-allyl metal species, which instantly become nucleophilic under reductive conditions and react with various electrophiles including the rather stable CO2 to afford synthetically useful β,γ-unsaturated carboxylic acid derivatives. In this review, we focus on the recent advances in such catalytic umpolung carboxylations of allyl alcohols, acetates, pivalates, and halides with CO2 under thermal, photochemical, and electrochemical conditions. More information can be found in the Review by Tsuyoshi Mita et al.
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