Aliphatic hydroxy-acids. Part III. Syntheses with alkyl 2-acetoxy-3-carboxypropionates
作者:R. Brettle、D. W. Latham
DOI:10.1039/j39680000906
日期:——
Methyl (±)-2-acetoxy-3-carboxypropionate has been prepared from (±)-malic acid and used in crossed Kolbe electrolyses to prepare dimethyl (±)-2-acetoxydodecane-1,12-dioate and three methyl 2-acetoxyalkanoates. Dimethyl and diethyl meso-2,5-diacetoxyadipates have been isolated from the Kolbe electrolyses of methyl and ethyl (±)-2-acetoxy-3-carboxypropionates respectively, and the presence of the corresponding
The Methoxycarbonylation of Vinyl Acetate Catalyzed by Palladium Complexes of [1,2-Phenylenebis(methylene)]bis[di(tert-butyl)phosphine]
作者:Adam J. Rucklidge、George E. Morris、Alexandra M. Z. Slawin、David J. Cole-Hamilton
DOI:10.1002/hlca.200690174
日期:2006.8
Palladium complexes of [1,2-phenylenebis(methylene)]bis[di(tert-butyl)phosphine] (1) catalyze the methoxycarbonylation of vinyl acetate (= ethenyl acetate) in the presence of methanesulfonic acid (Scheme 1). High selectivities to ester products can be obtained if free phosphine ligand is in excess over the amount of added acid (Table 1). Selectivities to methyl 2-acetoxypropanoate, a precursor to lactate
Carbonylation of ethylenically unsaturated compounds
申请人:Eastham Graham Ronald
公开号:US09334227B2
公开(公告)日:2016-05-10
A process for the carbonylation of ethylenically unsaturated compounds including vinyl esters and a process for the production of 3-hydroxy propanoate esters or acids. The process comprises reacting said compound with carbon monoxide in the presence of a source of hydroxyl groups and of a catalyst system. The catalyst system is obtainable by combining: (a) a metal of Group 8, 9 or 10 or a compound thereof: and (b) a bidentate ligand of general formula (I): X1(X2)-Q2-A-R—B-Q1-X3(X4).
[EN] ALKOXYCARBONYLATION OF VYNIL ESTERS<br/>[FR] ALCOXYCARBONYLATION D'ESTERS VINYLIQUES
申请人:LUCITE INT UK LTD
公开号:WO2005118519A1
公开(公告)日:2005-12-15
A process for the alkoxycarbonylation of a vinyl ester comprising reacting a vinyl ester with carbon monoxide in the presence of an alkanol and a catalyst system. The catalyst system used in the said process is obtainable by combining: a) a metal of Group VIII B or a compound thereof, and b) a bidentate ligand of general formula (I) wherein, R is a covalent bridging group; R1 together with Q2 to which it is attached form an optionally substituted 2-Q2-tricyclo[3.3.1.1 3,7}]decyl group or derivative thereof(2-PA); R2 and R3 independently represent univalent radicals upto 20 atoms or jointly form a bivalent radical of up to 20 atoms; and Q1 and Q2 each independently represent phosphorous, arsenic or antimony. The process is carried out for the production of a 3-hydroxy propanoate ester or acid of formula (II) CH2 (OH)CH2 C(O) OR28. The process may also be carried out for the production of a lactate ester or acid of formula (III).
一种用于烯丙酸酯的烷氧羰基化的方法,包括在存在一种烷醇和一个催化剂体系的情况下,将烯丙酸酯与一氧化碳反应。所述方法中使用的催化剂体系可通过组合以下物质获得:a) VIII B族金属或其化合物,以及b) 一种一般式(I)的双齿配体,其中,R是一个共价桥接基团;R1与其连接的Q2共同形成一个可选择地取代的2-Q2-三环[3.3.1.1 3,7}]癸基团或其衍生物(2-PA);R2和R3独立地代表最多20个原子的一价基团,或共同形成最多20个原子的二价基团;Q1和Q2各自独立地代表磷、砷或锑。该方法用于生产式(II) CH2 (OH) C(O) OR28的3-羟基丙酸酯或酸。该方法也可用于生产式(III)的乳酸酯或酸。