1. Forman Digital Repository
  2. Forman Christian College (A Chartered University)
  3. Office of Research, Innovation and Commercialization (ORIC)
  4. Chemistry Department
Please use this identifier to cite or link to this item: http://digitalrepository.fccollege.edu.pk/handle/123456789/2271
Full metadata record
DC FieldValueLanguage
dc.contributor.authorSaeed Iqbal, Mohammad-
dc.contributor.authorA. HUSSAIN, Muhammad-
dc.contributor.authorSHAHWAR, Dure-
dc.contributor.authorN. HASSAN, Muhammad-
dc.contributor.authorN. TAHIR, Muhammad-
dc.contributor.authorSHER, Muhammad-
dc.date.accessioned2024-05-28T06:24:31Z-
dc.date.available2024-05-28T06:24:31Z-
dc.date.issued2010-01-
dc.identifier.citationHussain, Muhammad & Shahwar, Dure & Hassan, Muhammad & Tahir, Muhammad & Iqbal, Mohammad & Sher, Muhammad. (2010). An efficient esterification of pullulan using carboxylic acid anhydrides activated with iodine. Collection of Czechoslovak Chemical Communications. 75. 10.1135/cccc2009095.en_US
dc.identifier.otherDOI:10.1135/cccc2009095-
dc.identifier.urihttp://202.142.177.21/handle/123456789/2271-
dc.descriptionIn present research work, a new and efficient method for the esterification of pullulan was successfully designed, i.e. pullulan was allowed to react with in situ activated acid anhydrides using iodine as a catalyst. Pullulan was successfully esterified with small sized acetic anhydride and long chain stearic anhydride. Pullulan nonaacetate was synthesized with greater efficiency even without using any solvent. As all reactions were carried out at 50 °C for only 3 h hence present method appeared highly efficient, time saving and energy effective. Because iodine is a cheap, commercially available, non degradative to glycosidic linkages and environment friendly reagent, hence this reaction methodology can be adopted on commercial scale for acetylation of pullulan.en_US
dc.description.abstractAcylation of alcohols (esterification) with anhydride is an important and routinely utilized transformation in organic synthesis. Iodine is a cheap and one of the most powerful anhydride activating agents for the esterification of alcohols. Therefore, an efficient and cost effective method was developed for the acylation of pullulan polysaccharide by using different acid anhydrides activated with iodine. A series of organo-soluble pullulan esters were successfully synthesized, purified and characterized. Under solvent free conditions, it was feasible to fabricate pullulan nonaacetate and pullulan stearate. Attachment (covalent) of the pendant groups onto polymer backbone was verified by spectroscopic techniques. All of the products were characterized by using thermal analysis, FTIR and 1H NMR spectroscopy.en_US
dc.description.sponsorshipThe authors acknowledge Higher Education Commission of Pakistan for a financial grant under the program titled “International Linkages of Pakistani Universities with Foreign Universities”. We thank Mr. F. A. Khan, HiTech Labs, University of Sargodha, for extensive spectral analysis and technical help.en_US
dc.language.isoen_USen_US
dc.publisherresearchgate.neten_US
dc.subjectAcid anhydrides; Esterification; Acylation; Iodine; NMR spectroscopy; Polysaccharides; Pullulan.en_US
dc.titleAN EFFICIENT ESTERIFICATION OF PULLULAN USING CARBOXYLIC ACID ANHYDRIDES ACTIVATED WITH IODINEen_US
dc.typeArticleen_US
Appears in Collections:Chemistry Department

Files in This Item:
File Description SizeFormat 
CCCC2010.pdf490.2 kBAdobe PDFView/Open
Show simple item record


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.