New and expeditious tandem sequence aza-Michael/intramolecular nucleophilic substitution route to substituted gamma-lactams: synthesis of the tricyclic core of (+/-)-martinellines |
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Authors: | Comesse Sébastien Sanselme Morgane Daïch Adam |
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Affiliation: | URCOM, EA 3221, UFR des Sciences & Techniques, Université du Havre, 25 rue Philippe Lebon, BP 540, F-76058 Le Havre Cedex, France. sebastien.comesse@univ-lehavre.fr |
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Abstract: | A new and highly diastereoselective tandem reaction aza-Michael/intramolecular nucleophilic substitution is presented. This unprecedented tandem reaction between N-substituted alpha-bromoacetamides and Michael acceptors proceeds with good yields and excellent diastereoselectivity to provide the corresponding trisubstituted gamma-lactam systems. An application to the concise synthesis of the tricyclic core of (+/-)-martinelline alkaloids is also described. |
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