Study on improved diastereoselectivity in photo-induced electron transfer pinacol coupling reactions of substituted acetophenones
Novel diastereoselective photo-induced pinacol coupling reactions of acetophenones by using triethylamine and chiral tertiary amines as electron donating co-sensitizers were studied. Various influence factors including solvents, substituents, and chiral a
Hydrogenations without hydrogen: Titania photocatalyzed reductions of maleimides and aldehydes
A mild procedure for the reduction of electron-deficient alkenes and carbonyl compounds is described. UVA irradiations of substituted maleimides with dispersions of titania (Aeroxide P25) in methanol/acetonitrile (1:9) solvent under dry anoxic conditions led to hydrogenation and production of the corresponding succinimides. Aromatic and heteroaromatic aldehydes were reduced to primary alcohols in similar titania photocatalyzed reactions. A mechanism is proposed which involves two proton-coupled electron transfers to the substrates at the titania surface.
Manley, David W.,Buzzetti, Luca,MacKessack-Leitch, Andrew,Walton, John C.
p. 15324 - 15338
(2015/01/16)
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