Studies on the syntheses of heterocyclic compounds. Part CDXXXIV. A novel total synthesis of olivacine (1,5-dimethyl-6H-pyrido[4,3-b]-carbazole)

Alkaloids

“…The N-acetyl derivative of the Wieland-Gumlich aldehyde is diaboline. Aspidospermatidine (336) and condylocarpine (337) were also placed in this group because of their structural relationship to strychnine. Preparation.…”

“…The first synthesis of ellipticine (340) was achieved by Woodward [335]. Olivacine (341) was synthesized by several groups [336]. Uleine (342), apparicine (343), and vallesamine (344) also do not bear a tryptamine unit as a distinguishable feature in their fundamental structure, but they are normally grouped under the Aspidosperma family since they occur in Aspidosperma species.…”