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The three component coupling reaction of aldehydes, phenylacetamide and dienophiles gave the corresponding N -phenylacetamidocyclohexene derivatives in good yields (55–70%) and high regioselectivity. For the first time, enzymatic kinetic resolution of this class of compounds has been achieved....
Several chiral hydroxylated polymers have been prepared, via ADMET techniques, from the diene diol derived from bromobenzene, obtained by means of whole-cell fermentation with Escherichia coli (JM109 pDTG601).
The substrate specificity of the heat-stable stereospecific amidase from Klebsiella oxytoca was investigated. In addition to the original substrate, 3,3,3-trifluoro-2-hydroxy-2-methylpropanamide, the amidase accepted 2-hydroxy-2-(trifluoromethyl)-butanamide and...
We recently reported conversion of cytochrome P450 BM-3, a medium-chain (C 12 –C 18 ) fatty acid monooxygenase, into a highly efficient alkane hydroxylase by directed evolution ( Nat. Biotechnol. 2002, 20 , 1135). P450 BM-3 mutant 139-3 exhibited high activity towards a variety of fatty acid...
Asymmetric biohydrolysis of trisubstituted terpenoid oxiranes ( rac - 1a – rac - 3a ) was accomplished by employing the epoxide hydrolase activity Rhodococcus and Streptomyces spp. Depending on the biocatalyst, the biohydrolysis proceeded in an enantio-convergent fashion and gave the...
The synthesis of cyclodextrins with from 6 to more than 50 glucose units by cyclodextrin glucanotransferase (CGTase, EC 18.104.22.168) from Bacillus macerans was investigated. Analysis of the synthesized cyclic α-1,4-glucan products showed that a higher yield of large-ring cyclodextrins were obtained...
Herein we report a new preparation of 4-hydroxy-2,5-dimethyl-2,3-dihydrofuran-3-one, the flavor compound strawberry furanone, based on a ‘green’ approach with a minimum number of steps. The first step is an enzymatic dioxygenation of p -xylene to form cyclohexadiene- cis -diol, followed by...
The present research introduces approaches for the dynamic kinetic resolution of the methyl esters of proline and pipecolic acid. As the result, a method was developed which is based on the acylation of the secondary amino group of the amino esters with vinyl butanoate by Candida antarctica...
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