Highly efficient selective monohydrolysis of dialkyl malonates and their derivatives
作者:Satomi Niwayama、Hanjoung Cho、Chunlei Lin
DOI:10.1016/j.tetlet.2008.05.007
日期:2008.7
The highly efficient selective monohydrolysis of symmetric diesters has been applied to monohydrolysis of several dialkyl malonates and their derivatives. The best conditions apply 0.8-1.2 equiv of aqueous KOH with a co-solvent, THF or acetonitrile, at 0 degrees C. The procedure is highly practical, yielding the corresponding half-esters in high yields in a straightforward manner, without inducing decarboxylation. It was found that the selectivity tends to become higher with increased hydrophobicity. (c) 2008 Elsevier Ltd. All rights reserved.
Synthesis of half esters
申请人:Niwayama Satomi
公开号:US20090023945A1
公开(公告)日:2009-01-22
A method for hydrolyzing an ester is provided. In accordance with the method, a compound A is provided which has first and second ester moieties. The compound is reacted in a liquid medium with a base having the formula M
a
X
b
, such that the first ester moiety is converted to a carboxyl moiety and the second ester moiety remains, wherein the ratio [X
k−
]:[A] in the liquid medium is no greater than 1.6, and wherein k>0.
SYNTHESIS OF HALF ESTERS
申请人:Niwayama Satomi
公开号:US20130150613A1
公开(公告)日:2013-06-13
A method for hydrolyzing an ester is provided. In accordance with the method, a compound A is provided which has first and second ester moieties. The compound is reacted in a liquid medium with a base having the formula M
a
X
b
, such that the first ester moiety is converted to a carboxyl moiety and the second ester moiety remains, wherein the ratio [X
k−
]:[A] in the liquid medium is no greater than 1.6, and wherein k>0.
US8338635B2
申请人:——
公开号:US8338635B2
公开(公告)日:2012-12-25
[EN] SYNTHESIS OF HALF ESTERS<br/>[FR] SYNTHÈSE D'HÉMIESTERS
申请人:UNIV TEXAS TECH
公开号:WO2008150487A2
公开(公告)日:2008-12-11
[EN] A method for hydrolyzing an ester is provided. In accordance with the method, a compound A is provided which has first and second ester moieties. The compound is reacted in a liquid medium with a base having the formula MaXb,such that the first ester moiety is converted to a carboxyl moiety and the second ester moiety remains, wherein the ratio [Xk-]:[A] in the liquid medium is no greater than 1.6, and wherein k > 0. [FR] L'invention concerne un procédé pour hydrolyser un ester. Selon le procédé, on fournit un composé A qui a des première et seconde fractions d'ester. Le composé est amené à réagir dans un milieu liquide avec une base ayant pour formule MaXb, de sorte que la première fraction d'ester est convertie en une fraction carboxyle et la deuxième fraction d'ester reste, le rapport [Xk-] : [A] dans le milieu liquide n'étant pas supérieur à 1,6, et dans lequel k > 0.