Total Synthesis of (±)-Cytisine via the Intramolecular Heck Cyclization of Activated <i>N</i>-Alkyl Glutarimides
作者:Jotham W. Coe
DOI:10.1021/ol006765t
日期:2000.12.1
[reaction:see text] A synthesis of racemic cytisine 1 has been developed utilizing an intramolecularHeckcyclization to prepare the bridged tricyclic intermediate 2. The cyclization employs activated glutarimide-derived ketene aminals 3 (X = P(O)OEt(2) or SO(2)CF(3)) and represents the first use of such intermediates in metal-catalyzed processes.