Addition reactions of acetylenic esters to 6,7-dihydrobenzo[b]furan-4(5H)-one, 6,7-dihydroindol-4(5H)-one, 5,6-dihydrobenzo[b]furan-7(6H)-one and 5,6-dihydroindol-7(6H)-one ketoximes. Formation of reduced furo[g]- and pyrrolo[g]-indoles

摘要

Thermal rearrangement of 6,7-dihydrobenzo[b]furan-4(5H)-one and 4,5,6,7-tetrahydroindol-4-one 4(7)-O-(E)-(1,2-dimethoxycarbonylvinyl)ketoximes gave 4,5-dihydrofuro[2,3g]- and 4,5-dihydropyrrolo[2,3g]- and [3,2-g] indoles, three novel tricyclic systems. [References: 15]