Improved synthesis of anhydroglycitol esters of improved colour

Details Improved synthesis of anhydroglycitol esters of improved colour Improved synthesis of anhydroglycitol esters of improved colour

C - Chemistry, Metallurgy

07

D

C07D 493/04 (2006.01) C07D 307/00 (2006.01)

Patent

CA 2430090

Diesters of dianhydroglycitols can be prepared by esterification of dianhydroglycitols, anhydroglycitols and/or glycitols with alkylcarboxylic or arylcarboxylic acids in the presence of an acid catalyst, the acid catalyst being a macroporous acid ion exchange resin. If glycitols or monoanhydroglycitols are used as the starting material, the reaction temperature is initially of the order of 120 ~C and after the dehydration is approximately 140 ~C.

Selon l'invention, on peut préparer des diesters de dianhydroglycitols et ou de glycitols à l'aide d'acides alkylcarboxyliques ou arylcarboxyliques en présence d'un catalyseur acide, tel qu'une résine acide macroporeuse échangeuse d'ions. Si on utilise les glycitols ou les monoanhydroglycitols comme matériau de départ, la température de réaction est initialement de l'ordre de 120 ·C et d'environ 140 ·C après déshydratation.

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