作者:Jacek W. Morzycki、Agnieszka Z. Wilczewska、Zenon Łotowski
DOI:10.1016/0040-4039(96)00197-9
日期:1996.3
The reactions of four steroidal enamides with acetyl nitrate were studied. The nitronium ion attacks the terminal carbon atom of the enamide moiety. Further transformations of the unsaturated nitro derivative consist of an allylic oxidation or a Nef-type reaction.
Reactions of 4-azacholest-5-en-3-one, 6-azacholest-4-en-7-one, and their N-methyl derivatives with electrophilic reagents
作者:Jacek W. Morzycki、Agnieszka Z. Wilczewska
DOI:10.1016/0040-4020(96)00847-2
日期:1996.10
The reactions of four steroidal ene-lactams with electrophilic reagents, such as bromine, acetyl nitrate or CrO3, were studied. The initial electrophilic attack took place on the terminal carbon atom of the enamide system. In some cases further reactions at the allylic position were observed. There were no reactions at the nitrogen atom or in the α position to the lactam carbonyl group.