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Machine translation
1. (WO1981003331) PROCESS FOR PREPARING A DIBENZYLIDENESORBITOL OR A DIBENZYLIDENEXYLITOL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/003331    International Application No.:    PCT/JP1981/000105
Publication Date: 26.11.1981 International Filing Date: 01.05.1981
IPC:
C07D 493/04 (2006.01)
Applicants:
Inventors:
Priority Data:
80/65601 16.05.1980 JP
Title (EN) PROCESS FOR PREPARING A DIBENZYLIDENESORBITOL OR A DIBENZYLIDENEXYLITOL
(FR) PROCEDE DE PREPARATION D"UN DIBENZYLIDENE SORBITOL OU D"UN DIBENZYLIDENE XYLITOL
Abstract: front page image
(EN)A process for preparing a dibenzylidenesorbitol or a dibenzylidenexylitol by reacting sorbitol or xylitol with an optionally substituted benzaldehyde or the alkylacetal derivative thereof in the presence of an acid catalyst, a hydrophobic organic solvent, and a water-soluble, polar organic solvent, which comprises using a sufficient amount of said hydrophobic organic solvent to precipitate crystals of the dibenzylidenesorbitol or dibenzylidenexylitol and keep the reaction system in a gel or solid state, and conducting the reaction under forced stirring.
(FR)Procede de preparation d"un dibenzylidene sorbitol ou d"un dibenzylidene xylitol en faisant reagir du sorbitol ou du xylitol avec un benzaldehyde eventuellement substitue ou son derive alkyle acetal en presence d"un catalyseur acide, un solvant organique hydrophobe, et un solvant organique polaire soluble dans l"eau, qui consiste a utiliser une quantite suffisante de ce solvant organique hydrophobe pour precipiter les cristaux de dibenzylidene sorbitol ou dibenzylidene xylitol et garder le systeme reactionnel dans un etat de gel ou dans un etat solide, en effectuant la reaction sous agitation forcee.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)