DMDO oxidation of the hydroxy groups of bile acid methyl esters establishes the positional order of reactivity as 3-7 > 6 > 12 and supports a mechanism involving C-H oxygen insertion through a planar intramolecularly hydrogen bonded transition state.
β¦ LIBER β¦
Selective oxidation of nitrocompounds by dimethyldioxirane
β Scribed by Roberto Ballini; Fabrizio Papa; Paolo Bovicelli
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- French
- Weight
- 180 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0040-4039
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## Abstract Oxidation of the (__E__) and (__Z__) isomers of the 3βarylidenechromanones 5 by isolated dimethyldioxirane (as acetone solution) at ambient temperature resulted in the formation of the spiro epoxides __trans__β and __cis__β6, respectively, in moderate yields (23β51%), together with cons