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A concise and improved synthesis of (+)-eleutherin, (+)-allo-eleutherin and a formal synthesis of (+)-nocardione B

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TETRAHEDRON-ASYMMETRY
卷 22, 期 4, 页码 487-492

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetasy.2011.02.011

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  1. Board of Research in Nuclear Sciences (BRNS), Government of India [2009/37/25/BRNS]
  2. Council of Scientific and Industrial Research (CSIR), New Delhi

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A concise and improved stereoselective synthesis of (+)-eleutherin, (+)-allo-eleutherin and the formal synthesis of (+)-nocardione B is described. The synthesis is based on a Dotz benzannulation and an improved oxa-Pictet-Spengler cyclization as the key steps. The synthesis is achieved in six steps in overall yields of 18% for eleutherin and 20% for allo-eleutherin. (C) 2011 Elsevier Ltd. All rights reserved.

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