Towards a Total Synthesis of Quinocarcin: Diastereoselective Synthesis of Functionalized Azepino[1,2-b]isoquinolines
作者:Oliver Koepler、Sabine Laschat、Angelika Baro、Peter Fischer、Burkhard Miehlich、Marc Hotfilder、Christoph le Viseur
DOI:10.1002/ejoc.200400231
日期:2004.9
corresponding 1-unsubstituted tetrahydroisoquinoline alcohol 11 were converted into aldehydes 27 and 33, which cyclized in the presence of different Lewis acids to give the substituted azepino[1,2-b]isoquinolines 34 and 35, respectively, which are key structural features of the alkaloid quinocarcin. The stereoselectivities of the Lewis-acid-catalyzed hetero-ene reaction are highly dependent on the substitution