Zeolite catalyzed selective deprotection of di- and tri-O-isopropylidene sugar acetals
Autor: | Duraikkannu Loganathan, Manoharan Mathiselvam, Pallooru Muni Bhaskar |
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Jazyk: | angličtina |
Rok vydání: | 2008 |
Předmět: |
Aqueous solution
Chemistry Organic Chemistry General Medicine Microporous material Xylose Alkenes Biochemistry Catalysis Analytical Chemistry Hydrolysis chemistry.chemical_compound Acetals Acids Catalyst activity Sugars O-Isopropylidene acetals Room temperature Solid acids Zeolites acetal glucose mannitol mannose o isopropylidene xylose zeolite carbon nuclear magnetic resonance catalyst deprotection reaction filtration hydrolysis priority journal proton nuclear magnetic resonance thin layer chromatography medicine Organic chemistry Mannitol Sugar Zeolite medicine.drug |
Zdroj: | IndraStra Global. |
ISSN: | 2381-3652 |
Popis: | H-Beta zeolite, a microporous solid acid, is demonstrated to be an efficient catalyst for the selective deprotection of cyclic as well as acyclic O-isopropylidene sugar acetals derived from d-glucose, d-xylose, d-mannose, and d-mannitol in aqueous MeOH at room temperature. A notable observation is the conversion of d-mannitol triacetonide into 1,2:3,4-di-O-isopropylidene-d-mannitol (48%) and 3,4-O-isopropylidene-d-mannitol (36%) brought about in 6 h by H-beta zeolite and the non-occurrence of any hydrolysis in the case of H-ZSM-5 catalyzed reaction in 24 h under the same conditions. � 2008 Elsevier Ltd. All rights reserved. |
Databáze: | OpenAIRE |
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