Synthesis of the diazatricyclic core of the marine alkaloids madangamines |
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Authors: | Naoki Yamazaki |
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Institution: | School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan |
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Abstract: | A new approach to synthesize the madangamine core structure is described. The synthesis involves intramolecular N,O-acetalization of the keto-aminophenol which allows rapid construction of the 2-azabicyclo3.3.1]nonane skeleton with a quaternary carbon center at C4. This strategy also demonstrates the utility of such approach in the stereoselective construction of the central diazatricyclic core found in the madangamine alkaloids. |
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Keywords: | Alkaloid Cyclization Madangamine Michael reaction N O-acetalization |
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