Solvent-free synthesis of modified pectin compounds promoted by microwave irradiation

Microwave-assisted solvent-free modification of pectin was successfully accomplished, consisting in the esterification of several fatty acids by pectin alcoholic functions. The reaction was performed by simply mixing the reagents with a catalytic amount of the inorganic base (potassium carbonate) an...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2012-10, Vol.17 (10), p.12234-12242
Main Authors: Calce, Enrica, Bugatti, Valeria, Vittoria, Vittoria, De Luca, Stefania
Format: Article
Language:English
Subjects:
Chemistry
Communication
Dielectric properties
Fatty acids
green chemistry
microwave irradiation
Microwaves
pectin
Pectins - chemical synthesis
Pectins - chemistry
Protocol
solvent-free
Solvents
Solvents - chemistry
Spectroscopy, Fourier Transform Infrared
Thermogravimetry
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Summary:Microwave-assisted solvent-free modification of pectin was successfully accomplished, consisting in the esterification of several fatty acids by pectin alcoholic functions. The reaction was performed by simply mixing the reagents with a catalytic amount of the inorganic base (potassium carbonate) and irradiating the obtained mixture with microwaves for a short time (3-6 min). The replacement of the traditional heating with a microwave source allowed the development of a new synthetic protocol which provided increased yield of the final products, since it eliminates the small amount of degraded polysaccharide produced during traditional oil bath heating. The desired esters were fully characterized by FT-IR spectroscopy and thermogravimetric analysis.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules171012234