Process for making monomenthyl esters

Details Process for making monomenthyl esters Process for making monomenthyl esters

C - Chemistry, Metallurgy

07

C

C07C 67/08 (2006.01) C07C 69/40 (2006.01) C07C 69/42 (2006.01) C07C 69/44 (2006.01)

Patent

CA 2637402

A process for making monomenthyl esters of dicarboxylic acids is disclosed. Menthol reacts with a saturated, cyclic anhydride in the presence of a base catalyst / selected from the group consisting of alkali metal or alkaline earth metal salts, oxides, hydroxides, and mixtures thereof, under conditions effective to produce a mixture of mono- and bis-menthyl esters in which the molar ratio of mono- to bis-menthyl esters is enhanced compared with the ratio of esters produced in a similar uncatalyzed process.

L'invention concerne un procédé de fabrication d'esters monomenthylique d'acides dicarboxyliques. Le menthole réagit avec un anhydride cyclique saturé en présence d'un catalyseur basique dans des conditions efficaces pour obtenir un mélange d'esters mono- et bis-menthyliques, le rapport molaire des esters mono- et bis-menthyliques étant amélioré en comparaison du rapport des esters obtenus par un procédé similaire non catalysé.

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