Application of microbial enantiofacially selective hydrolysis in natural product synthesis
摘要:
Pichinia farinosa IAM 4682 mediated enantiofacially selective hydrolysis worked efficiently (65-70% yield) on the interface-bioreactor in a reproducible manner, which established the product, (R)-2-benzylcyclohexanone (84-87%e.e.), to be the starting material for the synthesis of optically active natural products. Methyl (R)3-hydroxy-12- methyltridecanoate. a constituent of lipopolysaccharide, and (R)-1,3-nonanediol, a secretion of cucumber fly, were synthesized via this common intermediate, of which the optically active secondary alcohol moiety was derived from the above chiral ketone by Baeyer-Villiger oxidation. Final products were enantiomerically enriched to 94-95% e.e., by the lipase-mediated enantioselective transesterification which could remove the minor enantiomer as the corresponding acetate.
Laboratory Evolution of Robust and Enantioselective Baeyer−Villiger Monooxygenases for Asymmetric Catalysis
作者:Manfred T. Reetz、Sheng Wu
DOI:10.1021/ja906212k
日期:2009.10.28
and induced fit docking suggests potential randomization sites, different from all previous approaches to focused library generation. Sites harboring highly conserved proline in a loop of the WT are targeted. The most active and enantioselective mutants retain the high thermostability of the parent WT PAMO. The success of the "proline" hypothesis in the present system calls for further testing in future
Induced allostery in the directed evolution of an enantioselective Baeyer–Villiger monooxygenase
作者:Sheng Wu、Juan Pablo Acevedo、Manfred T. Reetz
DOI:10.1073/pnas.0911656107
日期:2010.2.16
accepted by the wild type. By using the known X-ray structure of PAMO, a decision was made regarding an appropriate site at which saturation mutagenesis is most likely to generate mutants capable of inducing allostery without any effector compound being present. After screening only 400 transformants, a double mutant was discovered that catalyzes the asymmetric oxidative kinetic resolution of a set of structurally
Converting Phenylacetone Monooxygenase into Phenylcyclohexanone Monooxygenase by Rational Design: Towards Practical Baeyer-Villiger Monooxygenases
作者:Marco Bocola、Frank Schulz、François Leca、Andreas Vogel、Marco W. Fraaije、Manfred T. Reetz
DOI:10.1002/adsc.200505069
日期:2005.6
A homology model of the most frequently used, but thermally somewhat labile, Baeyer–Villiger monooxygenase, cyclohexanone monooxygenase (CHMO) has been derived on the basis of the recently published crystal structure of the thermally stable phenylacetone monooxygenase (PAMO). This has led to the identification of a structural element crucial for substrate acceptance and stereoselectivity, namely an
Comparison of microbiologically and enzymatically mediated Baeyer–Villiger oxidations: synthesis of optically active caprolactones
作者:Véronique Alphand、Roland Furstoss、Sandrine Pedragosa-Moreau、Stanley M. Roberts、Andrew J. Willetts
DOI:10.1039/p19960001867
日期:——
Optically active a-substituted caprolactones (7-substituted oxepan-2-ones) were obtained by biocatalysed Baeyer-Villiger oxidations of various a-substituted cyclohexanones using either whole-cells of Acinetobacter TD63 or a purified cyclohexanone monooxygenase from Ps. putida NCIMB 10007(MO2). A refinement of the previously established active site model is proposed.
A Light-Driven Stereoselective Biocatalytic Oxidation
作者:Frank Hollmann、Andreas Taglieber、Frank Schulz、Manfred T. Reetz