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Lipase catalyzed esterification of free hydroxyl groups of Beta-cyclodextrin and its derivatives.

Pattekhan, H. H. and Divakar, S. (2002) Lipase catalyzed esterification of free hydroxyl groups of Beta-cyclodextrin and its derivatives. Indian Journal of Chemistry, 41B (5). pp. 1025-1027.

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Abstract

Modification of hydroxyl groups of beta-cyclodextrin (beta-CD) and its n-heptane at 50 C has been carried out with acetic, propionic, butyric, isobutyric, valeric, isovaleric, lauric, octanoic, palmitic and stearic acids. Degree of modification is determined from 1H NMR. Although the ratio of beta-CD to organic acid employed is 1:50, 6.8 OH groups on an average are found to be modified with acetic acid, 0.38 with propionic acid and 2.43 with isobutyric acid. Heptakis-2,6-di-)-methyl-beta-cyclodextrin (DMbeta-CD) and hydroxypropyl-beta-cyclodextrin (HPbeta-CD) which are already substituted with methyl and hydroxypropyl groups, respectively show degrees of substitution to be 2.45 and 2.0 at the freely available 2-OH or 3-OH hydroxyl groups.

Item Type: Article
Uncontrolled Keywords: Rhizomucor miehei; Hydrozypropyl
Subjects: 600 Technology > 08 Food technology > 08 Food Chemistry
Divisions: Fermentation Technology and Bioengineering
Depositing User: Somashekar K.S
Date Deposited: 08 Jul 2011 09:07
Last Modified: 01 Jun 2012 11:21
URI: http://ir.cftri.com/id/eprint/4560

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