Synthesis of Bridged Benzoazabicyclic Compounds Using Radical Translocation/Cyclization Reactions of 1-Alkynyl-2-(o-iodobenzoyl)tetrahydroisoquinolines
作者:Masazumi Ikeda、Masahiro Hamada、Serry A. A. El Bialy、Katsuaki Matsui、Shimpei Kawakami、Yuka Nakano、Said M. M. Bayomi、Tatsunori Sato
DOI:10.3987/com-99-s91
日期:——
Bu3SnH-mediated radical translocation/cyclization reactions of 1-alkynyl-2-(o-iodobenzoyl)tetrahydroisoquinolines were examined. The 1-[3-(trimethylsilyl)prop-2-ynyl]- (10a) and 1-[4-(trimethylsilyl)but-3-ynyl]-1,2,3,4-tetrahydroisoquinoline derivatives (10b), with Bu3SnH in the presence of azobis(isobutyronitrile) in boiling toluene, gave regioselectively the 6,7,8,9-tetrahydro-5H-benzocyclohepten-5,8-imine (12a) and 5,6,7,8,9,10-hexahydrobenzocycloocten-5,9-imine (12b), respectively.