B. El Ali et al., Heteropolyacid-catalyzed chemoselective oxidation of benzil derivatives tocarboxylic esters by dioxygen, AR J SCI EN, 26(1A), 2001, pp. 3-10
Benzil derivatives are catalytically oxidized by the heteropolyacids of gen
eral formula H3+nPMo12-nVnO40, xH(2)O (HPA-n, n = 1-4, x = 30-36) with diox
ygen under mild conditions. High yields and excellent selectivity of mono-
and dicarboxylic esters were obtained in the presence of primary alcohols o
r diols.