Minor Enantiomer Recycling: Metal Catalyst, Organocatalyst and Biocatalyst Working in Concert
Abstract A minor enantiomer recycling one‐pot procedure employing two reinforcing chiral catalysts has been developed. Continuous regeneration of the achiral starting material is effected via selective enzyme‐catalyzed hydrolysis of the minor product enantiomer from Lewis acid–Lewis base catalyzed a...
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crwiley:10.1002/chem.200901338 2024-06-23T07:46:19+00:00 Minor Enantiomer Recycling: Metal Catalyst, Organocatalyst and Biocatalyst Working in Concert Wingstrand, Erica Laurell, Anna Fransson, Linda Hult, Karl Moberg, Christina 2009 http://dx.doi.org/10.1002/chem.200901338 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fchem.200901338 https://onlinelibrary.wiley.com/doi/full/10.1002/chem.200901338 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Chemistry – A European Journal volume 15, issue 44, page 12107-12113 ISSN 0947-6539 1521-3765 journal-article 2009 crwiley https://doi.org/10.1002/chem.200901338 2024-06-06T04:20:24Z Abstract A minor enantiomer recycling one‐pot procedure employing two reinforcing chiral catalysts has been developed. Continuous regeneration of the achiral starting material is effected via selective enzyme‐catalyzed hydrolysis of the minor product enantiomer from Lewis acid–Lewis base catalyzed addition of acyl cyanides to prochiral aldehydes in a two‐phase solvent system. The process provides O‐acylated cyanohydrins in close to perfect enantioselectivities, higher than those obtained in the direct process, and in high yields. A combination of a ( S , S )‐salen Ti Lewis acid and Candida antarctica lipase B provides the products with R absolute configuration, whereas the opposite enantiomer is obtained from the ( R , R )‐salen Ti complex and Candida rugosa lipase. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Rugosa ENVELOPE(-61.250,-61.250,-62.633,-62.633) Salen ENVELOPE(25.467,25.467,-72.133,-72.133) Chemistry – A European Journal 15 44 12107 12113 |
institution |
Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract A minor enantiomer recycling one‐pot procedure employing two reinforcing chiral catalysts has been developed. Continuous regeneration of the achiral starting material is effected via selective enzyme‐catalyzed hydrolysis of the minor product enantiomer from Lewis acid–Lewis base catalyzed addition of acyl cyanides to prochiral aldehydes in a two‐phase solvent system. The process provides O‐acylated cyanohydrins in close to perfect enantioselectivities, higher than those obtained in the direct process, and in high yields. A combination of a ( S , S )‐salen Ti Lewis acid and Candida antarctica lipase B provides the products with R absolute configuration, whereas the opposite enantiomer is obtained from the ( R , R )‐salen Ti complex and Candida rugosa lipase. |
format |
Article in Journal/Newspaper |
author |
Wingstrand, Erica Laurell, Anna Fransson, Linda Hult, Karl Moberg, Christina |
spellingShingle |
Wingstrand, Erica Laurell, Anna Fransson, Linda Hult, Karl Moberg, Christina Minor Enantiomer Recycling: Metal Catalyst, Organocatalyst and Biocatalyst Working in Concert |
author_facet |
Wingstrand, Erica Laurell, Anna Fransson, Linda Hult, Karl Moberg, Christina |
author_sort |
Wingstrand, Erica |
title |
Minor Enantiomer Recycling: Metal Catalyst, Organocatalyst and Biocatalyst Working in Concert |
title_short |
Minor Enantiomer Recycling: Metal Catalyst, Organocatalyst and Biocatalyst Working in Concert |
title_full |
Minor Enantiomer Recycling: Metal Catalyst, Organocatalyst and Biocatalyst Working in Concert |
title_fullStr |
Minor Enantiomer Recycling: Metal Catalyst, Organocatalyst and Biocatalyst Working in Concert |
title_full_unstemmed |
Minor Enantiomer Recycling: Metal Catalyst, Organocatalyst and Biocatalyst Working in Concert |
title_sort |
minor enantiomer recycling: metal catalyst, organocatalyst and biocatalyst working in concert |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1002/chem.200901338 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fchem.200901338 https://onlinelibrary.wiley.com/doi/full/10.1002/chem.200901338 |
long_lat |
ENVELOPE(-61.250,-61.250,-62.633,-62.633) ENVELOPE(25.467,25.467,-72.133,-72.133) |
geographic |
Rugosa Salen |
geographic_facet |
Rugosa Salen |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Chemistry – A European Journal volume 15, issue 44, page 12107-12113 ISSN 0947-6539 1521-3765 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/chem.200901338 |
container_title |
Chemistry – A European Journal |
container_volume |
15 |
container_issue |
44 |
container_start_page |
12107 |
op_container_end_page |
12113 |
_version_ |
1802645176478334976 |