Ethyl 6-(trifluoromethyl)pyridazine-3-carboxylate
CAS Number:
1192155-06-8
Molecular Formula:
C8H7F3N2O2
Organocatalytic synthesis of astaxanthin-containing poly(lactide)s
Literature Information
Publication Date
2010-12-20
DOI
10.1039/C0PY00227E
Impact Factor
5.582
Authors
Helen Middleton, Sarah Tempelaar, David M. Haddleton, Andrew P. Dove
View Original
Abstract
The synthesis of astaxanthin-containing poly(lactide)s is reported by the ring-opening polymerization of lactide initiated from residual alcohol groups on astaxanthin using a previously reported thiourea/tertiary amine catalyst. Polymers with molecular weights between 2500 and 30 000 g mol−1 are obtained with excellent levels of control, astaxanthin incorporation being confirmed by UV/Vis detected GPC, 1H NMR, MALDI-TOF MS and IR spectroscopic analysis. Study of the polymerizations at extended time periods revealed greatly increased levels of transesterification in comparison to polymerizations initiated by 4-pyrene-1-butanol, attributed to increased intramolecular transesterification side reactions.
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Source Journal
Polymer Chemistry
CiteScore:
8.6
Self-citation Rate:
7.3%
Articles per Year:
457
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