http://www.cnr.it/ontology/cnr/individuo/prodotto/ID15686
Preparation of regioprotected morins by lipase catalysed transesterification (Articolo in rivista)
- Type
- Label
- Preparation of regioprotected morins by lipase catalysed transesterification (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.molcatb.2007.10.007 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- D'Antona N.; Lambusta D.; Nicolosi G.; Bovicelli P. (literal)
- Pagina inizio
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- Selected and revised paper Conference: 8th International Symposium on Biocatalysis and Biotransformations Location: Oviedo Univ, Bioorganic Grp, Oviedo, SPAIN Date: JUL 08, 2007. (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Note
- Scopu (literal)
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- CNR Istituto Chimica Biomolecolare, Via del Santuario 110, 95028 Valverde, CT, Italy
CNR Istituto Chimica Biomolecolare, Dipartimento di Chimica, Piazzale A. Moro 1, 00185 Roma, Italy (literal)
- Titolo
- Preparation of regioprotected morins by lipase catalysed transesterification (literal)
- Abstract
- Different morin acetates have been prepared by alcoholysis of peracetate (6) in tetrahydrofuran with butanol, using Candida antarctica B or
Rhizomucor miehei lipase as catalysts. The first enzyme recognised preferentially the acetate group located at position C-4? on B ring, giving
3,5,7,2?-tetraacetylmorin (7). The second one, less selective, hydrolysed with comparable rates ester groups at position C-7 on A ring and C-4?
on B ring, furnishing 7 and 3,5,2?,4?-tetraacetylmorin (8) respectively. Prolonging alcoholysis time, both lipases gave a morin ester having free
OH groups at C-7 and C-4?, 3,5,2?-triacetylmorin (9). In any case lipases did not affect ester groups located at position C-3, C-5 and C-2?. Morin
derivative having free function OH in C-5, 3,2?-diacetylmorin (11) was prepared in high yield using as substrate for alcoholysis the partial ester
3,7,2?,4?-tetraacetylmorin (10) easily prepared by chemical conventional method. (literal)
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