Efficient differentiation of the hydroxyl groups of 3,4-O-isopropylidene-D-galactopyranosides by lipase catalyzed esterification and de-esterification
The Pseudomonas sp. (LPS) promoted acyl transfer from vinyl acetate to selected 3,4-O-isopropylidene-D-galactopyranosides takes place in a completely selective manner giving in high yield the corresponding 6-O-acetates. The acetylation rate is strongly dependent on the type and the orientation of th...
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Online Access: | http://hdl.handle.net/11568/198807 https://doi.org/10.1080/07328309708005733 |
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ftunivpisairis:oai:arpi.unipi.it:11568/198807 2024-04-14T08:04:03+00:00 Efficient differentiation of the hydroxyl groups of 3,4-O-isopropylidene-D-galactopyranosides by lipase catalyzed esterification and de-esterification BARILI PL MASTRORILLI E. CATELANI, GIORGIO D'ANDREA, FELICIA Barili, Pl Catelani, Giorgio D'Andrea, Felicia Mastrorilli, E. 1997 STAMPA http://hdl.handle.net/11568/198807 https://doi.org/10.1080/07328309708005733 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:A1997XY68200003 volume:16 issue:7 firstpage:1001 lastpage:1010 numberofpages:10 journal:JOURNAL OF CARBOHYDRATE CHEMISTRY http://hdl.handle.net/11568/198807 doi:10.1080/07328309708005733 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0031527779 D-GALACTOSE DERIVATIVES ACID info:eu-repo/semantics/article 1997 ftunivpisairis https://doi.org/10.1080/07328309708005733 2024-03-21T18:38:48Z The Pseudomonas sp. (LPS) promoted acyl transfer from vinyl acetate to selected 3,4-O-isopropylidene-D-galactopyranosides takes place in a completely selective manner giving in high yield the corresponding 6-O-acetates. The acetylation rate is strongly dependent on the type and the orientation of the aglycon, varying from a maximum of reactivity for the 1-deoxy derivative, 1,5-anhydro-3,4-O-isopropylidene-D-galactitol (1d), to a minimum for beta configurated alkyl glycosides and showing a complete loss of reactivity for 3',4':2,3:5,6-tri-O-isopropylidenelactose dimethyl acetal (1e). The latter compound is, however, selectively 6'-O-esterified in good yield by lipase from Candida Antarctica and vinyl acetate. Also the course of the enzymatic hydrolysis of 2,6-di-O-acetyl-3,4-O-isopropylidene-D-galactopyranosides 2 is dependent on the type of the aglycon, both for the reaction rate and the selectivity. The 2-O-acetates 4 are selectively obtained in good yields with porcine pancreatic lipase (PPL) promoted hydrolysis in the case of beta- and alpha-methyl, and 1-deoxy derivatives (2a, 2b and 2d), while for beta-benzyl (2c) and lactose (2e) analogues satisfactory results are obtained with lipase from Mucor miehei (IM20). Article in Journal/Newspaper Antarc* Antarctica ARPI - Archivio della Ricerca dell'Università di Pisa Journal of Carbohydrate Chemistry 16 7 1001 1010 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
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ftunivpisairis |
language |
English |
topic |
D-GALACTOSE DERIVATIVES ACID |
spellingShingle |
D-GALACTOSE DERIVATIVES ACID BARILI PL MASTRORILLI E. CATELANI, GIORGIO D'ANDREA, FELICIA Efficient differentiation of the hydroxyl groups of 3,4-O-isopropylidene-D-galactopyranosides by lipase catalyzed esterification and de-esterification |
topic_facet |
D-GALACTOSE DERIVATIVES ACID |
description |
The Pseudomonas sp. (LPS) promoted acyl transfer from vinyl acetate to selected 3,4-O-isopropylidene-D-galactopyranosides takes place in a completely selective manner giving in high yield the corresponding 6-O-acetates. The acetylation rate is strongly dependent on the type and the orientation of the aglycon, varying from a maximum of reactivity for the 1-deoxy derivative, 1,5-anhydro-3,4-O-isopropylidene-D-galactitol (1d), to a minimum for beta configurated alkyl glycosides and showing a complete loss of reactivity for 3',4':2,3:5,6-tri-O-isopropylidenelactose dimethyl acetal (1e). The latter compound is, however, selectively 6'-O-esterified in good yield by lipase from Candida Antarctica and vinyl acetate. Also the course of the enzymatic hydrolysis of 2,6-di-O-acetyl-3,4-O-isopropylidene-D-galactopyranosides 2 is dependent on the type of the aglycon, both for the reaction rate and the selectivity. The 2-O-acetates 4 are selectively obtained in good yields with porcine pancreatic lipase (PPL) promoted hydrolysis in the case of beta- and alpha-methyl, and 1-deoxy derivatives (2a, 2b and 2d), while for beta-benzyl (2c) and lactose (2e) analogues satisfactory results are obtained with lipase from Mucor miehei (IM20). |
author2 |
Barili, Pl Catelani, Giorgio D'Andrea, Felicia Mastrorilli, E. |
format |
Article in Journal/Newspaper |
author |
BARILI PL MASTRORILLI E. CATELANI, GIORGIO D'ANDREA, FELICIA |
author_facet |
BARILI PL MASTRORILLI E. CATELANI, GIORGIO D'ANDREA, FELICIA |
author_sort |
BARILI PL |
title |
Efficient differentiation of the hydroxyl groups of 3,4-O-isopropylidene-D-galactopyranosides by lipase catalyzed esterification and de-esterification |
title_short |
Efficient differentiation of the hydroxyl groups of 3,4-O-isopropylidene-D-galactopyranosides by lipase catalyzed esterification and de-esterification |
title_full |
Efficient differentiation of the hydroxyl groups of 3,4-O-isopropylidene-D-galactopyranosides by lipase catalyzed esterification and de-esterification |
title_fullStr |
Efficient differentiation of the hydroxyl groups of 3,4-O-isopropylidene-D-galactopyranosides by lipase catalyzed esterification and de-esterification |
title_full_unstemmed |
Efficient differentiation of the hydroxyl groups of 3,4-O-isopropylidene-D-galactopyranosides by lipase catalyzed esterification and de-esterification |
title_sort |
efficient differentiation of the hydroxyl groups of 3,4-o-isopropylidene-d-galactopyranosides by lipase catalyzed esterification and de-esterification |
publishDate |
1997 |
url |
http://hdl.handle.net/11568/198807 https://doi.org/10.1080/07328309708005733 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:A1997XY68200003 volume:16 issue:7 firstpage:1001 lastpage:1010 numberofpages:10 journal:JOURNAL OF CARBOHYDRATE CHEMISTRY http://hdl.handle.net/11568/198807 doi:10.1080/07328309708005733 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0031527779 |
op_doi |
https://doi.org/10.1080/07328309708005733 |
container_title |
Journal of Carbohydrate Chemistry |
container_volume |
16 |
container_issue |
7 |
container_start_page |
1001 |
op_container_end_page |
1010 |
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1796300429127057408 |