Unexpected Phenol Production from Arylboronic Acids under Palladium-Free Conditions; Organocatalyzed Air Oxidation
作者:Andrew N. Cammidge、Victoria H. M. Goddard、Christopher P. J. Schubert、Hemant Gopee、David L. Hughes、Daniel Gonzalez-Lucas
DOI:10.1021/ol202500z
日期:2011.11.18
An intriguing class of quinones that efficiently catalyze the air oxidation (overall hydroxylation) of arylboronic acids to the corresponding phenol is reported. Autocatalysis in the parent system is particularly efficient and leads to rapid, quantitative synthesis of quinones such as 4 from boronic acid 1 at room temperature using air as stoichiometric oxidant. The efficiency results from a balance