Revised Structures, Benzindol-2(1H)-ones, for the Ring-Contracted Cycloadducts from 1-Substituted Cycloheptapyrrol-2-(1H)-ones with Acetylenes

Article abstract of DOI:10.1246/bcsj.62.1663

Formerly-proposed structures, cyclopent-isoquinolin-3(4H)-ones, for ring contracted by-products obtained from 1-substituted cycloheptapyrrol-2(1H)-ones and acetylenes, were revised to benzindol-2(1H)-ones on the basis of spectroscopic analysis.