Silberioneninduzierte Reaktion von 3‐Chlor‐2‐pyrrolidinocyclohexen mit 1,3‐Dienen. Vorläufige Mitteilung

Abstract

Abstract 3‐Chloro‐2‐pyrrolidinocyclohexene ( 3 ) in the presence of silver tetrafluoroborate in methylene chloride at −60° underwent cycloadditions with various 1,3‐dienes; the resulting iminium tetrafluoroborate salts 4a–8a were hydrolysed to give the bicyclic and tricyclic ketones 4b–8b . The addition reactions can be regarded as [3+4]‐cycloadditions of an intermediate 2‐aminoallyl cation.