Synthesis of C-15 vindoline analogues by palladium-catalyzed cross-coupling reactions.

The Journal of organic chemistry (2006-09-26)
Peter D Johnson, Jeong-Hun Sohn, Viresh H Rawal

Described are general protocols for the rapid construction of various C-15-substituted analogues of vindoline using palladium-catalyzed cross-coupling reactions. The required bromo- and iodovindolines were prepared in high yield by the reaction of vindoline with N-bromosuccinimide or N-iodosuccinimide, respectively. The study not only led to the preparation of a number of structurally novel vindoline analogues but also opens the door to new strategies for the synthesis of vinblastine, vincristine, and related anticancer agents. Also described is the conversion of ent-tabersonine to ent-vindoline.

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XPhos, 98%