Efficient syntheses of the marine alkaloids makaluvamine D and discorhabdin C: The 4,6,7-trimethoxyindole approach

Article abstract of DOI:10.1021/jo00111a043

A new and efficient synthesis of the tricyclic quinonimine 20 as its trifluoroacetate 23 has been developed starting from the commercially available 2,4,5-trimethoxybenzaldehyde and proceeding via the hitherto unknown 4,6,7-trimethoxyindole (7). Quinonimi