Herein we report the first enantioselective totalsyntheses of pentacyclic homoproaporphine alkaloids by means of a route, which includes a tandem retro-oxa-Michael addition and nucleophilic substitution to generate the oxa-benzobicyclco[3.3.1]nonane core structure, a Pictet–Spengler cyclization to construct the fused B and C rings, and sequential Baeyer–Villiger oxidation and pinacol-type cyclization