Methyl vinyl ketone annelation of the Δ2- pyrroline (5b) prepared by acid-catalysed thermal rearrangement of the cyclopropyl imine (7) has been exploited in an efficient eight-step stereoselective total synthesis of racemic 3-epi-elwesine (3b).
R. V. Stevens and L. E. DuPree, J. Chem. Soc. D, 1970, 1585 DOI: 10.1039/C29700001585
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