thermodynamically-stable isomers is negligible. On the other hand, the palladium-catalyzed sulfonylation of allylic acetates with sodium benzenesulfinate is accompanied by the isomerization to give the thermodynamically-controlled products selectively. These results can be explained by assuming that allylic nitro compounds are more reactive to the palladium catalyst than allylic acetates and sulfones.
A practical access to allylic sulphones and lactones from allylic nitro compounds
作者:Bernard Barlaam、Jean Boivin、Samir Z. Zard
DOI:10.1016/s0040-4039(00)88507-x
日期:1990.1
Allylic nitro derivatives can be readily solvolysed in aqueous acetic acid to give allylicsulphones in the presence of a sulphinate salt or allylic lactones if the substrate contains a suitably located ester group.