The base-catalpaed epoxidation of a,S-unsaturated ketones often proceeds with a high degree of stereoeelectivity (1). Although a variety of eteroidal u-epoxyketones has been prepared in this way (2). the reaction6 of A&4-and A4-6-ketones with alkaline hydrogen peroxide have not been reported. Chole
Formation and cleavage of thiohydantoin ring catalysed by trypsin
β Scribed by F. Kraicsovits; M.A. Coletti-Previero; A. Previero
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 234 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0045-2068
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π SIMILAR VOLUMES
The reaction of indoles (A) with superoxide ion resulted in ring cleavage to give o-formyl and o-acylaminoketones -(A) or N-acylanthranilic acid (s) and ring expansion yielding 2-quinolones (3). All reactions are chemiluminescent
Silica-supported tantalum and tungsten hydrides present unusual properties in the activation of alkanes. They activate the C H bonds of cycloalkanes to form the corresponding surface metal -cycloalkyl complexes. They catalyse the metathesis reaction of alkanes which is an unprecedented process affor
## Abstract __Substituted 2βtropolone natural products are found in plants and fungi. Their biosynthesis is thought to occur by ring expansion from a cyclohexadienone precursor, but this reaction has not previously been demonstrated experimentally. Treatment of 6βhydroxyβ6βhydroxymethylcyclohexaβ2,