Efficient Syntheses of the Marine Alkaloids Makaluvamine D and Discorhabdin C: The 4,6,7-Trimethoxyindole Approach
作者:Eyyani V. Sadanandan、Sasi K. Pillai、M. V. Lakshmikantham、Adil D. Billimoria、J. Shane Culpepper、Michael P. Cava
DOI:10.1021/jo00111a043
日期:1995.3
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). Quinonimine 23 is the late stage key intermediate in several previously reported syntheses of the biologically active pyrrolo[4,3,2-de]-quinoline marine alkaloids discorhabdin C (1) and makaluvamine D (3).