Conjugate Additions, Aza-Cope, and Dissociative Rearrangements and Unexpected Electrocyclic Ring Closures in the Reactions of 2-(2-Pyrrolidinyl)-Substituted Heteroaromatic Systems with Acetylenic Sulfones
作者:Mitchell H. Weston、Masood Parvez、Thomas G. Back
DOI:10.1021/jo101030b
日期:2010.8.6
sulfones proceeded via two pathways. The first involves conjugateaddition of the pyrrolidine to the acetylenic sulfone to afford a zwitterion, followed by dissociation of the C−N bond and recombination of the resulting carbocation and vinyl anion to afford the corresponding azepine derivative. The second comprises a cascade of conjugateaddition, aza-Cope rearrangement and anionic 6π electrocyclic ring-closure