Modular Syntheses of Phenanthroindolizidine Natural Products

Young In Jo, Martin D. Burke, Cheol Hong Cheon

Research output: Contribution to journalArticlepeer-review


A highly concise strategy for the total synthesis of phenanthroindolizidines was developed. The one-pot iterative Suzuki-Miyaura reaction of aryl boronic acids with ortho-bromoaryl N-methyliminodiacetate (MIDA) boronate followed by a second Suzuki-Miyaura reaction with a suitable pyridyl bromide provided ortho-aza-terphenyls. Subsequent saturation of the triple bond, treatment with mesyl chloride, and reduction of the resulting dihydroindolizidinium ring afforded the hexahydroindolizines. A final vanadium-catalyzed oxidative electrocyclization provided the desired alkaloids in only three column-separation operations.

Original languageEnglish (US)
Pages (from-to)4201-4204
Number of pages4
JournalOrganic Letters
Issue number11
StatePublished - Jun 7 2019
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry


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