Baeyer-Villiger Oxidation of Bridged<i>endo-</i>Tricyclic Ketones with Engineered<i>Escherichia coli</i>Expressing Monooxygenases of Bacterial Origin
作者:Marko D. Mihovilovic、Radka Snajdrova、Alexander Winninger、Florian Rudroff
DOI:10.1055/s-2005-918938
日期:——
Whole-cell biotransformations using engineered strains of Escherichia coli expressing cyclopentanone (CPMO) and cyclohexanonemonooxygenases (CHMO) of various bacterial origins have been tested for substrate acceptance ontricyclic ketones. Based on the stereopreference of the biocatalytic Baeyer-Villigeroxidation, our recent clustering of this library of enzymes into two distinct groups based on protein
Palladium-Catalyzed Arylative Ring-Opening Reactions of Norbornenols: Entry to Highly Substituted Cyclohexenes, Quinolines, and Tetrahydroquinolines
作者:Michael Waibel、Nicolai Cramer
DOI:10.1002/anie.201001752
日期:2010.6.14
retro‐allylations from norbornene‐derived tertiary alcohols participate in coupling reactions with aryl‐ or vinylhalides to provide tetrasubstituted cyclohexenes with excellent regio‐ and diastereoselectivity (see scheme). This procedure was also exploited in domino reactions to access highly functionalized quinolines and tetrahydroquinolines.
The enzymatic Baeyer–Villiger oxidation of a series of bicyclo[2.2.1]hept-2-en-7-ones
作者:Michael J. Taschner、Lakshmi Peddada
DOI:10.1039/c39920001384
日期:——
The enzymatic BaeyerâVilliger oxidation of a series of bicyclo[2.2.1]hept-2-en-7-ones utilizing the enzyme cyclohexanone oxygenase (E.C. 1.14.13.-), isolated from the bacteria Acinetobacter NCIB 9871 provides lactone products with high enantiomeric excesses.
π-Facial selectivities in nucleophilic additions to 4-hetero-tricyclo[5.2.1.02,6]decan-10-ones and 4-hetero-tricyclo[5.2.1.02,6]dec-8-en-10-ones: an experimental and computational study
Several endo-tricyclo[5.2.1.02,6]decan-10-ones and endo-tricyclo[5.2.1.02,6]dec-8-en-10-ones with hetero atom modifications at the distal C-4 position have been subjected to hydridereduction. π-Face selectivities in these systems are largely governed by the same electronic factors that were earlier identified in the case of the norbornyl system. A computational study demonstrates good predictability