N-vinyl-2-pyrrolidone)(Au:PVP) promote the oxidation of benzylic ketones, including auto-oxidation-typebond-cleavage reactions and α-hydroxylation, under ambientconditions. The catalyst accelerates the formation of an α-peroxideintermediate, from which bond cleavage spontaneously proceeds inaqueous solvent to give the auto-oxidation products. In contrast,the α-hydroxylation product is obtained predominantly
Alkaline Cleavage of Unsymmetrical β-Diketones. Ring Opening of Acylcylohexanones to Form ε-Acyl Caproic Acids<sup>1</sup>
作者:Charles R. Hauser、Frederic W. Swamer、Betty I. Ringler
DOI:10.1021/ja01192a016
日期:1948.12
Air Oxidation of 2-Aryl-1-tetralones in Basic, Neutral, and Acidic Media: An Unprecedented Oxidative Aryl Migration to 2-Aryloxy-1-naphthols under Acidic Condition
Enantioselective bromolactonization by using an amino-urea catalyst to generate the important bromo-containing 3,4-dihydroisocoumarins is described. Excellent yields and good enantioselectivities could be achieved for various 3,4-dihydroisocoumarin compounds.
Organo‐radical catalysts have recently attracted great interest, and the development of this field can be expected to broaden the applications of organocatalysis. Herein, the first example of a radical‐generating system is reported that does not require any photoirradiation, radical initiators, or preactivated substrates. The oxidativeC−C‐bondcleavage of 2‐substituted cyclohexanones was achieved