Cosmol Co. Ltd

République de Corée

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1. Method for preparing crystalline 3-0-alkyl-ascorbic acid

Numéro d'application	12444821
Numéro de brevet	07838690
Statut	Délivré - en vigueur
Date de dépôt	2006-12-07
Date de la première publication	2010-02-25
Date d'octroi	2010-11-23
Propriétaire	Cosmol Co. Ltd (République de Corée)
Inventeur(s)	Park, Sung-Ryoung Lee, Geon-Min

Abrégé

The present invention relates to a method for preparing 3-O-substituted ascorbic acid derivatives represented by formula 1, in which 5,6-O-isopropylidene ascorbic acid is reacted with a halide in an organic solvent in the presence of the anion exchange resin absorbed with multi-iodine anions and then deprotected. The method of the present invention has an advantage of providing a target compound with high purity and high yield by finishing the reaction within a short period of time at room temperature.

Classes IPC ?

C07D 307/62 - Trois atomes d'oxygène, p. ex. acide ascorbique

2. METHOD FOR PREPARING CRYSTALLINE 3-0-ALKYL-ASCORBIC ACID

Numéro d'application	KR2006005274
Numéro de publication	2008/044809
Statut	Délivré - en vigueur
Date de dépôt	2006-12-07
Date de publication	2008-04-17
Propriétaire	COSMOL CO. LTD (République de Corée)
Inventeur(s)	Park, Sung-Ryoung Lee, Geon-Min

Abrégé

The present invention relates to a method for preparing 3- O- substituted ascorbic acid derivatives represented by formula 1, in which 5, 6-O-isopropylidene ascorbic acid is reacted with a halide in an organic solvent in the presence of the anion exchange resin absorbed with multi-iodine anions and then deprotected. The method of the present invention has an advantage of providing a target compound with high purity and high yield by finishing the reaction within a short period of time at room temperature.

Classes IPC ?

C07D 307/62 - Trois atomes d'oxygène, p. ex. acide ascorbique