Journal
TETRAHEDRON LETTERS
Volume 55, Issue 16, Pages 2609-2611Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2014.02.111
Keywords
Violacein; Microwave synthesis; Polyethylene glycol; Indole alkaloids; Pyrrol-2-one; Three-component cyclization
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Funding
- American Chemical Society's Petroleum Research Fund (ACS-PRF) [49471-UNI1]
- Research Corporation for Scientific Advancement (RCSA) [20215]
- Bard College
- Bard College Summer Research Institute (BSRI)
- National Science Foundation MRI Grant [1039659]
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An efficient, three-component, microwave-mediated cyclization to prepare the 3,5-disubstituted 2H-pyrrol-2-one core of the bis-indole alkaloid, violacein, is described. Preliminary results indicate an iterative, thermally driven, condensation of a gamma-ketoester, ammonium acetate, and isatin in polyethylene glycol. This methodology is an effective and environmentally benign route to prepare a series of violacein analogs in good overall yields. (C) 2014 Elsevier Ltd. All rights reserved.
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