[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.
General and Efficient α-Oxygenation of Carbonyl Compounds by TEMPO Induced by Single-Electron-Transfer Oxidation of Their Enolates
作者:Emanuela Dinca、Philip Hartmann、Jakub Smrček、Ina Dix、Peter G. Jones、Ullrich Jahn
DOI:10.1002/ejoc.201200736
日期:2012.8
for the synthesis of protected α-oxygenated carbonylcompounds is reported. It is based on the single-electron-transfer oxidation of easily generated enolates to the corresponding α-carbonyl radicals. Coupling with the stable free radical TEMPO provides α-(piperidinyloxy) ketones, esters, amides, acids or nitriles in moderate-to-excellent yields. Enolate aggregates influence the outcome of the oxygenation
The diastereo- and/or enantioselection are described in the title rearrangement of the chiral 2-(2-alkenyloxy)methyl 2-oxazolines which eventually provides optically active α-hydroxy, γ,δ- unsaturated esters and (+)-verrucarinolactone.
[EN] PROCESS OF PRODUCING ALPHA-HYDROXY COMPOUNDS AND USES THEREOF<br/>[FR] PROCÉDÉ DE PRODUCTION DE COMPOSÉS ALPHA-HYDROXY ET LEURS UTILISATIONS
申请人:HALDOR TOPSOE AS
公开号:WO2019154624A1
公开(公告)日:2019-08-15
New process of producing alpha-hydroxy compounds from sustainable resources useful as platform chemicals, such as hydroxy analogues of amino acids or polymer precursors.
从可持续资源中生产α-羟基化合物的新工艺,可作为平台化学品,例如氨基酸的羟基类似物或聚合物前体。
Benzoxazinone compounds and herbicidal composition containing the same
申请人:SAGAMI CHEMICAL RESEARCH CENTER
公开号:EP0328001A1
公开(公告)日:1989-08-16
A benzoxazinone compound represented by the formula (I):
wherein R¹ represents a hydrogen atom or an alkyl group, and R² represents a hydrogen atom, an alkyl group, a cyanoalkyl group, an alkenyl group, an alkynyl group or an aralkyl group; a process for preparing the same; and a herbicidal composition comprising the benzoxazinone compound as an active component are disclosed. The above benzoxazinone compounds exhibit a high selectivity for useful crop plants and a strong herbicidal activity with respect to various noxious weeds.