Photoinduced Alcoholysis of α,α,α-Tribromoacetophenone to Benzoylformate
作者:Yasuji Izawa、Katsuhiro Ishiguro、Hideo Tomioka
DOI:10.1246/bcsj.56.1490
日期:1983.5
Irradiation of p-substituted α,α,α-tribromoacetophenones (1) in O2-saturated alcohols (MeOH, prim. and sec. alcohols) afforded a new alcoholysis product, benzoylformate (2), in good yield (75–85%) along with benzoate and radical (reduction) products. Sensitization experiments showed that 2 was derived from the triplet excited 1. Formation of 2 as well as the decomposition rate of 1 were greatly accelerated
[EN] SYNTHESIS OF GLYCOLS VIA TRANSFER HYDROGENATION OF ALPHA-FUNCTIONAL ESTERS WITH ALCOHOLS<br/>[FR] SYNTHÈSE DE GLYCOLS AU MOYEN D'UNE HYDROGÉNATION PAR TRANSFERT D'ESTERS ALPHA-FONCTIONNELS AVEC DES ALCOOLS
申请人:EASTMAN CHEM CO
公开号:WO2019027948A1
公开(公告)日:2019-02-07
A transfer hydrogenation process for forming vicinal diols by hydrogenating 1,2-dioxygenated organic compounds using alcohols as the reducing agent instead of the traditional H2 gas. The transfer hydrogenation is carried out under milder conditions of temperature and pressure than is typical for ester hydrogenation with H2. The milder conditions of operation provide benefits, such as lower operating and capital costs for industrial scale production as well as savings in product purification due to the avoidance of by-products from exposure of reaction mixtures and products to high temperatures.
Various aryl iodides can be converted into α-keto esters in reactions with carbon monoxide and alcohols in the presence of tertiary amines and catalytic amounts of tertiary phosphine-coordinated palladium complexes.
多种芳基碘化物可在三烷基胺及少量三烷基膦配位的钯络合物催化下,与一氧化碳和醇反应生成α-酮酯。
Reactions of benzoyl(carbonyl)transition metal complexes with LiNMe2: on the feasibility of a reaction route to α-keto amide through an acyl(carbamoyl)cobalt intermediate
CO-coordinated benzoyltransition metal complexes, PhCOCo(CO)3L (L PPh3, PCy3, and PMe3), PhCOMn(CO)5, have been prepared and their reactions with LiNMe2 examined. The reactions give α-keto amide (PhCO-CONMe2) after treating the systems with Br2 or organic halides.
MICROCAPSULES CONTAINING A GAS-GENERATING PHOTOLABILE POLYMER AND USES THEREOF
申请人:Firmenich SA
公开号:US20170266103A1
公开(公告)日:2017-09-21
The present invention relates to water-dispersable microcapsules comprising an oil phase, e.g. a perfume, containing a photolabile polymer comprising α-ketoacid or α-ketoester group capable of generating a gas upon exposure to light. The gas is able to cause an extension or the breaking of the microcapsule allowing the release of the oil phase and thus increasing the long-lastingness of the odor perception. The present invention concerns also the use of said microcapsules in perfumery as well as perfuming compositions or perfumed articles comprising the invention's microcapsules to provide a prolonged release of fragrant molecules.