Intramolecular [4+2] cycloaddition react
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Stephen F. Martin; Ta-shue Chou; Chih-yun Tu
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Article
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1979
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Elsevier Science
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French
β 259 KB
An attempt to utilize a new strategy for alkaloid synthesis which features the intramolecular [4+2] cycloaddition of enamines and enamides for the construction of the tetracyclic spiroamine skeleton characteristic of the ~rythrina alkaloids was unsuccessful, unexpectedly giving a bridged cycloadduct