A. Chojnacka, R. Obara, C. Wawrzeńczyk
Jan 31, 2007
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Journal
Tetrahedron-asymmetry
Abstract
Abstract Different lipases were screened as biocatalysts in the kinetic resolution process of (±)-hept-1-en-3-ol 1 , (±)-5-methylhex-1-en-3-ol 2 , (±)-6-methylhept-2-en-4-ol 3 , (±)-6,6-dimethylhept-2-en-4-ol 4 , and 1-phenylbut-3-en-2-ol 5 by enantioselective transesterification. The acylation of (±)- 1 and (±)- 2 catalyzed by Novozym 435 ( Candida antarctica ) was very effective and proceeded with good enantioselectivity. After 4–8 h of reactions the esters formed and the alcohols, which remained were obtained with high enantiomeric excess with 97–100% ee and 91–100% ee, respectively. The lipase Amano PS ( Burkholderia cepacia ) was the best catalyst in the asymmetric transesterification of (±)- 5 affording the ( R )-alcohol with 90–95% ee and the ( S )-ester with 98–100% ee. Low enantioselectivities were observed in the cases of lipase-catalyzed acylation of (±)- 3 and (±)- 4 .