Anti-tumour heterocycles : part 16 : the synthesis of 7,10-dimethoxyellipticine and its pyrrolo[2,3-f]carbazole and pyrrolo[3,2-f] analogues

The final examples in our ellipticine/pyrrolocarbazole synthesis programme are 7,10-dimethoxyellipticine 1a and the corresponding pyrrolocarbazoles 2a and 3a which have been synthesised from 4,6-dimethoxyindole