摘要:
The invention relates to a method for producing optionally substituted methylenedioxybenzene. The invention particularly relates to the production of methylenedioxybenzene. The inventive production method is characterized by the fact that it involves the reaction of an optionally substituted catechol with an aldehyde in the presence of a solid acid catalyst selected among: a titanium silicalite and a zeolite that is doped with tin and/or titanium.
摘要:
The invention relates to a method for producing optionally substituted methylenedioxybenzene. The invention particularly relates to the production of methylenedioxybenzene. The inventive production method is characterized by the fact that it involves the reaction of an optionally substituted catechol with an aldehyde in the presence of a solid acid catalyst selected among: a titanium silicalite and a zeolite that is doped with tin and/or titanium.
摘要:
Diesters are prepared by first hydrolyzing dinitrile compounds into imide compounds and then reacting such imide compounds with at least one alcohol.
摘要:
The present invention relates to the production of compounds comprising nitrile functions and of cyclic imide compounds. It relates more particularly to the production of compounds comprising nitrile functions from compounds comprising carboxylic functions, advantageously of natural and renewable origin, and from 2-methylglutaronitrile (MGN) or a mixture N of dinitriles comprising 2-methylglutaronitrile (MGN), 2-ethylsuccinonitrile (ESN) and adiponitrile (AdN).
摘要:
Diesters are prepared by first hydrolyzing dinitrile compounds into imide compounds and then reacting such imide compounds with at least one alcohol.
摘要:
A method for preparing a terpenylcyclohexanol using a terpenylphenol is described. A method for preparing a terpenylcyclohexanol by hydrogenation of a terpenylphenol is also described wherein the method includes hydrogenating the latter in a liquid phase, in the presence of a Raney nickel catalyst including residual aluminium and doped with a mixture of iron and chromium.
摘要:
A process for condensing at least one carbonyl compound carrying at least one electron-withdrawing group with an aromatic derivative carrying at least one hydroxyl functional group, wherein the electron-withdrawing group present on the carbonyl compound is selected from fluoroalkyl derivatives, esters, including orthoesters, and nitriles and said condensation is carried out in a basic medium.
摘要:
A subject of the present invention is a process for the reduction of a carbonyl compound. More precisely, the invention relates to a process for reduction of an aldehyde and/or of a ketone. The reduction process of the invention, which consists of reacting a carbonyl compound with an alcohol in the presence of a zeolite catalyst, is characterized by the fact that it comprises: mixing, in any manner whatever, the carbonyl compound and the alcohol, passing said mixture over a catalyst bed containing at least one zeolite, subjecting the reaction mixture leaving the catalyst bed to recirculation over the catalyst bed, for a number of times that is sufficient to obtain the desired degree of conversion of the substrate.
摘要:
A process for the preparation of aldehydes by hydrogen reduction of carboxylic acids, esters or anhydrides, characterized in that the reduction conducted in the vapor phase, in the presence of a bimetallic catalyst of the ruthenium/tin type.
摘要:
Dibromonaphthalene compounds having the formula (1): ##STR1## are 1-monodebrominated by reacting same, neat or in an acid organic solvent, with molecular hydrogen or a compound that generates nascent hydrogen, in situ, in the medium of reaction, in the presence of a catalytically effective amount of a hydrodebromination catalyst.