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
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