Dedicated to the memory of Professor John Fossey
Abstract
The ubiquity of carboxylic acids as naturally derived or man-made chemical feedstocks has spurred the development of powerful, decarboxylative C–C bond-forming transformations for organic synthesis. Carboxylic acids benefit not only from extensive commercial availability, but are stable surrogates for organohalides or organometallic reagents in transition-metal-catalysed cross-coupling. Open shell reactivity of carboxylic acids (or derivatives thereof) to furnish carbon-centred radicals is proving transformative for synthetic chemistry, enabling novel and strategy-level C(sp3)–C bond disconnections with exquisite chemoselectivity. This short review will summarise several of the latest advances in this ever-expanding area.
1 Introduction
2 Improved Decarboxylative Arylations
3 sp3–sp3 Cross-Coupling of Carboxylic Acids with Aliphatic Bromides
4 sp3–sp3 Cross-Coupling of Carboxylic Acids with Aliphatic Alcohols and Amines
5 Doubly Decarboxylative sp3–sp3 Cross-Coupling of Carboxylic Acids
6 Decarboxylative C–C Bond Formation from (Hetero)aryl Carboxylic Acids
7 Conclusions
Key words
decarboxylative - C–C coupling - radicals - carboxylic acids - photoredox catalysis - electrochemistry