Aza analogues of protoberberine and phthalideisoquinoline alkaloids

Abstract
Anions derived from furo[3,4-c]pyridin-3(1H)-one, by treatment with lithium diisopropylamide, react with substituted, 3,4-dihydroisoquinolines and 2-methyl-3,4-dihydroisoquinolinium salts yielding nitrogen analogues of the protoberberine and phthalideisoquinoline alkaloids, respectively.