التفاصيل البيبلوغرافية
| العنوان: |
Enzymatic direct synthesis of acrylic acid esters of mono- and disaccharides |
| المؤلفون: |
Tsukamoto, Junko, Heabel, Sophie, Valenca, Gustavo P., Peter, Martin, Franco, Telma |
| المصدر: |
Journal of Chemical Technology & Biotechnology 83 (2008) 11, S. 1486 - 1492, DOI 10.1002/jctb.1983 |
| حالة النشر: |
Postprint |
| بيانات النشر: |
Universität Potsdam; Mathematisch-Naturwissenschaftliche Fakultät. Institut für Chemie, 2008. |
| سنة النشر: |
2008 |
| المجموعة: |
Potsdam University |
| Original Material: |
urn:nbn:de:kobv:517-opus-42652 |
| مصطلحات موضوعية: |
carbohydrate esters, enzymatic esterification, acrylic acid esters, MALDI-TOF mass spectrometry, Chemistry and allied sciences |
| الوصف: |
BACKGROUND: There is an increased need to replace materials derived from fossil sources by renewables. Sugar-cane derived carbohydrates are very abundant in Brazil and are the cheapest sugars available in the market, with more than 400 million tons of sugarcane processed in the year 2007. The objective of this work was to study the preparation of sugar acrylates from free sugars and free acrylic acid, thus avoiding the previous preparation of protected sugar derivatives, such as glycosides, or activated acrylates, such as vinyl acrylate. RESULTS: Lipase catalyzed esterification of three mono- and two disaccharides with acrylic acid, in the presence or absence of molecular sieves was investigated. The reactions were monitored by high-performance liquid chromatography (HPLC) and the products were analyzed by matrix-assisted laser desorption ionization–time of flight (MALDI-TOF) mass spectrometry. The main products are mono- and diacrylates, while higher esters are formed as minor products. The highest conversion to sugar acrylates was observed for the D-glucose and D-fructose, followed by D-xylose and D-maltose. Molecular sieves had no pronounced effect on the conversion CONCLUSIONS: A feasible method is described to produce and to characterize sugar acrylates, including those containing more than two acrylate groups. The process for production of these higher esters could potentially be optimized further to produce molecules for cross-linking in acrylate polymerization and other applications. The direct enzymatic esterification of free carbohydrates with acrylic acid is unprecedented. |
| Original Identifier: |
oai:kobv.de-opus-ubp:4265 |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| الإتاحة: |
http://opus.kobv.de/ubp/texte_eingeschraenkt_verlag/2010/4265Test/ |
| حقوق: |
Volltextzugriff: Universitätsverlag - eingeschränkter Zugriff
URL: http://opus.kobv.de/ubp/doku/urheberrecht.phpTest |
| رقم الانضمام: |
edsndl.Potsdam.oai.kobv.de.opus.ubp.4265 |
| قاعدة البيانات: |
Networked Digital Library of Theses & Dissertations |
