Regiodivergent Baeyer–Villiger oxidation of fused ketone substrates by recombinant whole-cells expressing two monooxygenases from Brevibacterium
作者:Marko D. Mihovilovic、Peter Kapitán
DOI:10.1016/j.tetlet.2004.02.036
日期:2004.3
MicrobialBaeyer–Villigeroxidations of fused bicyclic ketones with a cyclobutanone structural motif were investigated using recombinant Escherichia coli cells expressingtwomonooxygenases from Brevibacterium. In a kinetic resolution process fused ketones were transformed to regioisomeric lactones: ‘normal’ lactones were generated by migration of the more substituted carbon atom and ‘abnormal’ lactones
Microbiological transformations. 25. Enantioselective baeyer-villiger oxidation as a tool for the synthesis of enantiopure bicyclic furofuran and pyrofuran chirons.
作者:Frédéric Petit、Roland Furstoss
DOI:10.1016/s0957-4166(00)80245-1
日期:1993.6
Several bicyclic [n.2.0] ketones were submitted to enzymatic Baeyer-Villigeroxidation and provided the corresponding regioisomeric lactones showing high enantiopurities. These products could be used as interesting chirons for the synthesis of various natural compounds. The absolute configurations of the obtained lactones were assigned using circular dichroism measurements.
The synthesis of a series of bicyclicnucleosides using photolytic ring-expansion of cyclobutanones is reported. The cyclobutanone precursors were prepared by [2+2] cycloaddition of a series of cyclic alkenes with chlorinated ketenes, derived from dichloro- and trichloroacetyl chloride. The synthesis of the nucleosides was achieved through photolysis of cyclobutanone precursors with 6-chloropurine