Coupling reactions of indole-3-acetic acid derivatives. Synthesis of arcyriaflavin A
作者:Jan Bergman、Eva Koch、Benjamin Pelcman
DOI:10.1039/b004029k
日期:——
The bisindolesuccinic acid methyl ester 10 was obtained by an iodine-promoted coupling of the dianion 9. The diester was converted to the N-benzylimide 12, which was oxidatively cyclized to the indolo[2,3-a]pyrrolo[3,4-c]carbazole 15. The diester 10 could be directly transformed to the known indolocarbazole diester 27via acid-induced intramolecular cyclization in TFA. The same methodology gave arcyriaflavin A 4 from the succinimide 18b.