- Iron Catalysis for Room-Temperature Aerobic Oxidation of Alcohols to Carboxylic Acids
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Oxidation from alcohols to carboxylic acids, a class of essential chemicals in daily life, academic laboratories, and industry, is a fundamental reaction, usually using at least a stoichiometric amount of an expensive and toxic oxidant. Here, an efficient and practical sustainable oxidation technology of alcohols to carboxylic acids using pure O2 or even O2 in air as the oxidant has been developed: utilizing a catalytic amount each of Fe(NO3)3·9H2O/TEMPO/MCl, a series of carboxylic acids were obtained from alcohols (also aldehydes) in high yields at room temperature. A 55 g-scale reaction was demonstrated using air. As a synthetic application, the first total synthesis of a naturally occurring allene, i.e., phlomic acid, was accomplished.
- Jiang, Xingguo,Zhang, Jiasheng,Ma, Shengming
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supporting information
p. 8344 - 8347
(2016/07/26)
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- Novel Method for Preparing Unsaturated Fatty Hydroxyacids
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The invention concerns a method for preparing a compound of formula (I), wherein: R3 and R1 represent in particular H and n is greater than 4, said preparation method including performing a Wittig-Horner reaction with a phosphonate on a lactol, so as to obtain a hydroxyester and, optionally a saponification reaction of said hydroxyester.
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Page/Page column 11
(2008/12/08)
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- Method for the preparation of unsaturated hydroxy fatty acids and their esters, their use in pharmaceutical and/or cosmetic preparations
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A method of preparing unsaturated hydroxy fatty acids and esters thereof corresponding to general formula (Id): wherein n=1 to 4, m=2 to 16, R1═OH, Cl, Br, OR3 in which R3 is a straight or branched alkyl, alkenyl or alkynyl radical of 1 to 16 carbons or glycerol esters, optionally substituted by one or more atoms selected from the group consisting of carbon, nitrogen, sulfur and halogens, R2═H, SiR′1R′2R′3 in which R′1, R′2 and R′3 can be identical or different from each other and are a straight or branched alkyl, alkenyl or alkynyl radical of 1 to 16 carbons or glycerol esters, optionally substituted by one or more atoms selected from the group consisting of carbon, nitrogen, sulfur and halogens, or R2═C—Ar3 with Ar representing an aryl radical optionally substituted by one or more atoms selected from the group consisting of carbon, nitrogen, sulfur and halogens, or R2=the tetrahydropyranyl of formula: is disclosed.
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