Gold-Catalysed Cycloisomerisation of Ynamides To Access 2,2-Disubstituted Tetrahydrothiophene Motifs
作者:Paul W. Davies、Parmjit Heer Kaur
DOI:10.1055/a-1434-4273
日期:2021.6
Ynamides bearing a tethered allyl sulfoxide undergo a gold-catalysed cycloisomerisation to afford tetrahydrothiophene-2-carboxamides and their benzo-fused analogues. The reactions are initiated by a formal 7-endo-dig cyclisation and accommodate a range of different substituents. The use of N-allyl ynamides provided a route into novel spirocyclic ε-lactam structures.