Dhr. Barton et al., THE INVENTION OF RADICAL REACTIONS .34. HOMOLOGATION OF CARBOXYLIC-ACIDS TO ALPHA-KETO CARBOXYLIC-ACIDS BY BARTON-ESTER BASED RADICAL-CHAINCHEMISTRY, Tetrahedron, 51(7), 1995, pp. 1867-1886
Carboxylic acids can be transformed into the homologous alpha-keto aci
ds by Barton-ester based radical chemistry. This method was especially
successful when ethyl alpha-trifluoroacetoxy acrylate was used as a r
adical trap.