Abstract The catalyticoxidative domino degradation of phenols was investigated. Hydrogenperoxide (30% aq.) was used as an oxidant and 2,2′-dinitro-4,4′-ditrifluoromethyldiphenyl diselenide 4e as a catalyst. The products were muconic acid 5, and muconolactones muconolactones—5-carboxymethylfuran-2(5H)-ones 7 and 9. Phenols with alkyl groups at 2 or 4 positions of the benzene ring were converted regioselectively
Oxygenative cleavage of catechols including protocatechuic acid with molecular oxygen in water catalysed by water-soluble non-heme iron(iii) complexes in relevance to catechol dioxygenases
Catechol dioxygenase model oxygenations have been performed for the first time in water by using water-soluble nonheme iron(III) complexes, enabling the oxygenation of protocatechuic acid and other catechols.
Chemical Simulation of Biogenesis of the 2,4,5-Trihydroxyphenylalanine Quinone Cofactor of Copper Amine Oxidases: Mechanistic Distinctions Point toward a Unique Role of the Active Site in the <i>o</i>-Quinone Water Addition Step
作者:Subrata Mandal、Younghee Lee、Matthew M. Purdy、Lawrence M. Sayre
DOI:10.1021/ja992886g
日期:2000.4.1
surprising finding that water addition does not occur under solution chemistry conditions. The production of hydroxyquinone from catechol arises instead from reaction of the o-quinone with H2O2 generated during autoxidation of catechol. When starting with the o-quinone itself, production of hydroxyquinone still arises from autoxidation of the catechol, generated either by reduction of the o...