The present invention provides an improved catalytic process for esterification of carboxylic acids with org. carbonates in the presence of metal Lewis acid, such as metal triflates, perchlorates, tetrafluoroborates, halides, or acetates. For example, benzoic acid was reacted with di-M...
摘要: 1.It was found that compounds of the type CC12 = CX(CH2)nY(X = H or Hal; Y = various groups) react with halogen in acetic acid in presence of mercuric acetate with formation (after treatment with wateDOI: 10.1007/BF01168515 年份: 1958 ...
1. Process for the production of diphenol monoesters of carboxylic acids, characterised in that carboxylic acids are reacted with high molecular weight polycarbonates using catalysts at temperatures between 150 degrees C and 350 degrees C with the elimination of CO2 , one diphenol polycarbonate equiv...
Reaction of Reformatsky Reagents with Substituted Alkyl Esters of 2-Oxochromene-3-carboxylic Acid Reformatsky reagents generated from alkyl esters of bromoacetic, α-bromopropionic, α-bromobutyric, and α-bromoisobutyric acids react with alkyl esters o... VV Shchepin,DV Fotin,VV Fotin,... - ...
in them. the general formula for carboxylic acids is r – cooh where r refers to the rest of the molecule. the acidity of carboxylic acids is generally higher compared to simple phenols as they react with weak bases like carbonates and bicarbonates to liberate carbon dioxide gas. table of ...
Cyclization of the phenol of formula V-7 is carried out by treatment with strong acid to give the hydroxy chromanone of formula II-6 which is recovered by chromatography or crystallization. This cyclization can be achieved using conventional strong acids such as sulfuric acid, hydrochloric acid, ...
The energy active compound, when exposed to energy, generates one or more active species that can react with the luminescent compound to alter one or more of the characteristics of the luminescent compound. The luminescent compound can be colored or colorless. Further disclosed is a jet ink ...
(VI) and a halogen source, under mild reaction conditions, wherein R' is aryl, alkaryl, aralkyl or alkyl, and wherein 1 or more of said R' groups can be substituted with a Z group but not more than 3 of said R' groups in the molecule are so substituted; a is an integer from...
The polymer-supported complexes were tested as recyclable catalysts in the reaction of carboxylic acids addition to epichlorohydrin. The differences in the catalytic activity of the complexes depending on the route of salen immobilization onto the polymer matrix were observed. 展开 ...
Many other reactants are mentioned, e.g. cyclopentane carboxylic acid, phenylacetic, isonicotinic, oxalic and terephthalic acids, and chlorocarbonates of methanol, glycol, cyclohexanol, pentaerythritol and phenol.