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DOI: 10.1055/s-0032-1316549
An Ugi-Type Condensation of α-Isocyanoacetamide and Chiral Cyclic Imine under a New Catalytic System
Publikationsverlauf
Received: 25. April 2012
Accepted after revision: 24. Mai 2012
Publikationsdatum:
04. Juli 2012 (online)
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Abstract
A new catalytic Ugi-type condensation of α-isocyanoacetamide and chiral cyclic imine is developed, where the combination of phenyl phosphilic acid and trifluoroethanol is exploited to promote the Ugi-type condensation with α-isocyanoacetamide for the first time. Under this new catalytic system, the reaction using the cyclic imines as relatively inertial substrates proceed well, and chiral 3-oxazolyl-morpholin/piperazine-2-one derivatives are synthesized with high yield and stereoselectivity. Furthermore, transformation of the condensation product to a novel fused tricyclic structure is attempted initially by treatment with maleic anhydride.
Key words
catalytic Ugi-type condensation - α-isocyanoacetamide - oxazoles - phosphilic acid - asymmetric synthesisSupporting Information
- for this article is available online at http://www.thieme-connect.com/ejournals/toc/synlett.
- Supporting Information
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References and Notes
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