Facile oxidative conversion of alcohols to esters using molecular iodine
作者:Naoshi Mori、Hideo Togo
DOI:10.1016/j.tet.2005.03.097
日期:2005.6
A simple, efficient, and high-yield procedure for the oxidative conversion of alcohols to various types of esters and ketones, with molecular iodine and potassium carbonate was successfully carried out.
成功地进行了一种简单,高效且高收率的方法,将醇与分子碘和碳酸钾氧化转化为各种类型的酯和酮。
Process for Production of Alkyl Tin Alkoxide Compound, and Process for Production of Carbonic Acid Ester Using the Compound
申请人:Shinohata Masaaki
公开号:US20100292496A1
公开(公告)日:2010-11-18
The present invention provides a process for producing: a compound represented by XOR
2
; a dialkyl tin dialkoxide compound having one tin atom, two Sn—R
1
bonds and two Sn—OR
2
bonds; and/or a tetraalkyl dialkoxy distannoxane compound having one Sn—O—Sn bond, in which each tin atom of the tetraalkyl dialkoxy distannoxane compound has two Sn—R
1
bonds and one Sn—OR
2
bond, the process comprising reacting in the absence of a catalyst at least one alkyl tin compound selected from the group consisting of i) and ii) below:
i) a dialkyl tin compound having one tin atom, two Sn—R
1
(wherein R
1
represents an alkyl group) bonds, and two Sn—OX bonds (wherein OX is a group in which HOX that is a conjugate acid of OX is a Bronsted acid having a pKa of from 0 to 6.8); and
ii) a tetraalkyl distannoxane compound having one Sn—O—Sn bond, in which each tin atom of the tetraalkyl distannoxane compound has two Sn—R
1
bonds and one Sn—OX bond (wherein OX is a group in which HOX that is a conjugate acid of OX is a Bronsted acid having a pKa of from 0 to 6.8); and
a carbonic acid ester represented by R
2
OCOOR
2
(wherein R
2
represents a linear or branched, saturated or unsaturated hydrocarbon group, a hydrocarbon group having a saturated or unsaturated cyclic hydrocarbon substituent, or a Y—CH
2
— group (wherein Y represents an alkyl polyalkylene group, an aromatic group or a cyclic saturated or unsaturated alkylene ether group)), and/or
an alcohol represented by R
2
OH (wherein R
2
is the same as defined above).
[EN] PROCESSES FOR PRODUCING CARBOXYLIC ACIDS<br/>[FR] PROCÉDÉS DE PRODUCTION D'ACIDES CARBOXYLIQUES
申请人:EASTMAN CHEM CO
公开号:WO2020205348A1
公开(公告)日:2020-10-08
Processes are disclosed for preparing carboxylic acids from organic esters, the processes comprising contacting an ester with water in the presence of an acid catalyst and a homogenizing solvent at conditions effective to form a carboxylic acid. The homogenizing solvent is present in an amount sufficient to form a single-phase reaction mixture comprising the ester, water, and homogenizing solvent. The homogenizing solvent may be selected from acetonitrile, dimethyl sulfoxide, and 1,4-dioxane.
Methyl 2‐nitroacetate (MNA) is not as good as methyl acetoacetate (MAA) in giving transesterification reactions with alcohols. While MAA is capable of thermal transesterification without catalyst, MNA gives superior nitroacetates only with the use of a catalyst. Decomposition of MNA into CO2, CH3OH, and CH3NO2 should be prevented.
2-硝基乙酸甲酯(MNA)在与醇进行酯交换反应方面不如乙酰乙酸甲酯(MAA)好。尽管MAA能够在没有催化剂的情况下进行热酯交换,但MNA仅在使用催化剂的情况下才能提供优异的硝基乙酸酯。应防止MNA分解为CO 2,CH 3 OH和CH 3 NO 2。
METHOD FOR PRODUCING ALCOHOL COMPOUND
申请人:Hagiya Koji
公开号:US20120010417A1
公开(公告)日:2012-01-12
A method for producing an alcohol compound, wherein a carboxylic acid ester compound is reduced with hydrogen in the presence of a ruthenium complex which is obtained by reacting an imidazolium salt (A) having at least one optionally substituted amino group with a ruthenium compound (B) in the presence of a base (C).