A Diels–Alder/Ene Cascade Leading to 5‐(Pyrrolidin‐3‐yl)thieno[3,2‐<i>e</i>]isoindoles from Ketone‐derived 2‐Vinylthiophenes and<i>N</i>‐Phenylmaleimide
作者:Wayland E. Noland、Matthew P. Huisenga、Ryan J. Herzig、John A. Rosenow、Hoyeon Kim、Neil J. Kroll、Andrei Nesmelov、Benjamin T. Johnson、Nathan S. Duncan、Jidapa Ratanayanon、Ruixian A. Yue、Kenny Xiong、Bee K. Ong、Diane T. Vo、Nathan D. Klein、Simon B. Lang、Jacob K. Riley、Steven P. Daniels、Kenneth J. Tritch
DOI:10.1002/jhet.3327
日期:2018.12
as the dienophile. The dienes were prepared from thiophene in two steps by addition to various ketones, followed by dehydration (40–60% overall yields). Although most dienes were obtained as regioisomeric mixtures, the Diels–Alder‐derived products were easily purified by chromatography. The main cycloaddition pathway was endo Diels–Alder addition followed by exo ene addition of a second molecule of