4.8 Article

Enantioselective Total Synthesis of (-)- Lansai B and (+)- Nocardioazines A and B

Journal

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 24, Pages 6206-6210

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201402571

Keywords

cycloaddition; heterocycles; macrocycles; natural products; total synthesis

Funding

  1. NSF Chemistry Research Instrumentation award [CHE-0639094]
  2. NIH [RR027690, NIGMS RGM097582A]
  3. California Institute of Technology
  4. NIH (DuPont)

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The concise total syntheses of the bis(pyrroloindolines) (-)- lansai B and (+)- nocardioazines A and B are reported. The key pyrroloindoline building blocks are rapidly prepared by enantioselective formal [3+2] cycloaddition reactions. The macrocycle of (+)- nocardioazine A is constructed by an unusual intramolecular diketopiperazine formation.

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