Isolation, Synthesis, and Semisynthesis of Amaryllidaceae Constituents from <i>Narcissus</i> and <i>Galanthus</i> sp.: De Novo Total Synthesis of 2-<i>epi</i>-Narciclasine
bulbs, separation from haemanthamine, and the occurrence of a trace alkaloid, 2-epi-narciclasine, are reported. Attempts to convert natural narciclasine to its C-2 epimer by Mitsunobu inversion or oxidation/reduction sequences were compromised by rearrangement and aromatization processes, through which a synthesis of the alkaloid narciprimine was achieved. The methylation of the 7-hydroxy group of