Process for preparing 2-aryl-2-chloromalonic diesters
申请人:Huels Aktiengesellschaft
公开号:US05777152A1
公开(公告)日:1998-07-07
2-Aryl-2-chloramalonic diester is prepared by reacting 2-arylmalonic diesters with aqueous hypochlorite in the presence of an inert solubilizer at pH 8 to 14.
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.
WO2008/150487
申请人:——
公开号:——
公开(公告)日:——
CATALYST COMPOSITION FOR OLEFIN POLYMERIZATION AND APPLICATION OF SAME
申请人:China Petroleum & Chemical Corporation
公开号:EP3053935B1
公开(公告)日:2019-05-08
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.