Synthesis of 1,2,4,6,7,11b-hexahydrobenzo[a]quinolizin-3-one and of some related compounds
Abstract
High yield syntheses of 3-ethylidene-1,2,4,6,7,11b-hexahydrobenzo[a] quinolizine and the corresponding 3-ketone, and of 3-ethyl-2,3,4,6,7,11b-hexahydro-1H-benzo[a]quinolizine, are described, starting from 1-ethoxycarbonylmethyl-3,4-dihydroisoquinoline.