Abstract Esterification of several types of mono- and disubstituted phenols with various mono- and dialkanoyl chlorides was performed in phase-transfer catalysis conditions, using tetrabutylammonium chloride in a mixture of aqueous NaOH and dichloromethane. The process is particularly efficient (almost quantitative yields) as well as rapid (only 5 min reaction time, at a temperature of 0 °C). GRAPHICAL
摘要 在相转移催化条件下,使用四丁基氯化铵和 NaOH 水溶液和二氯甲烷的混合物,对几种类型的单和二取代酚与各种单和二烷酰氯进行酯化反应。该过程特别有效(几乎是定量的产率)和快速(仅 5 分钟反应时间,在 0 °C 的温度下)。图形概要
Process for the preparation of bis-hydroxyphenyl-n-alkanes, new
申请人:Bayer Aktiengesellschaft
公开号:US04716252A1
公开(公告)日:1987-12-29
Bis-hydroxyphenyl-n-alkanes are prepared by contacting dicarboxylic acids or dicarboxylic acid derivatives with fluorine-containing organic sulphonic acids, where appropriate with the addition of a phenolic compound, and converting the alkanediones, which are thus obtainable, into bis-hydroxyphenyl-n-alkanes by hydrogenation and, where appropriate, an additional ether cleavage. The invention also relates to new bis-hydroxyphenyl-n-alkanes and to new alkanediones.
Direct esterification of succinic acid with phenol using zeolite beta catalyst
作者:Son Dinh Le、Shun Nishimura、Kohki Ebitani
DOI:10.1016/j.catcom.2019.01.006
日期:2019.3
Directesterification of succinic acid with phenol in the presence of zeolite catalysts was explored. H+-zeolite β (SiO2/Al2O3 = 150) has emerged as the most effective solid acid catalyst, affording 96% yield of diphenyl succinate. The catalyst could be recycled upon 5 consecutive runs without appreciable decreases in activity. Additionally, the catalyst was successfully applied to the esterification
探索了在沸石催化剂存在下琥珀酸与苯酚的直接酯化。H +沸石β(SiO 2 / Al 2 O 3 = 150)成为最有效的固体酸催化剂,琥珀酸二苯酯的收率达96%。该催化剂可以连续运行5次而没有明显降低活性的情况下进行再循环。另外,该催化剂成功地用于几种二元羧酸与苯酚的酯化反应,产生了所需产品的良好和中等收率。所提出的方法不仅提供了异构系统的基本特征,而且使操作简单,使其更加经济和环保。
METHOD OF PREPARING ORGANIC ZINC CATALYST AND METHOD OF PREPARING POLYALKYLENE CARBONATE RESIN BY USING THE ORGANIC ZINC CATALYST PREPARED THEREBY
申请人:LG CHEM, LTD.
公开号:US20210246263A1
公开(公告)日:2021-08-12
The present disclosure relates to a method of preparing an organic zinc catalyst through solid phase blending that does not require a solvent and a washing process, and a method of preparing a polyalkylene carbonate resin by using the organic zinc catalyst prepared thereby.
Verfahren zur Herstellung von Bis-hydroxyphenyl-n-alkanen
申请人:BAYER AG
公开号:EP0210564A2
公开(公告)日:1987-02-04
Bis-hydroxyphenyl-n-alkane werden hergestellt, indem man Dicarbonsäuren oder Dicarbonsäurederivate mit Fluor enthaltenden organischen Sulfonsäuren, gegebenenfalls unter Zusatz einer phenolischen Verbindung, zusammenbringt und die so erhältlichen Alkandione durch Hydrierung und gegebenenfalls eine zusätzliche Etherspaltung in Bis-hydroxyphenyl-n-alkane überführt. Weiterhin betrifft die Erfindung neue Bis-hydroxyphenyl-n-alkane und neue Alkandione.