Author's Organization：Faculty of Pharmaceutical Sciences, Chiba University Faculty of Pharmaceutical Sciences, Chiba University Faculty of Pharmaceutical Sciences, Chiba University Faculty of Pharmaceutical Sciences, Tokyo University
Formal total synthesis of isodelphinine (1) was achieved. Isodelphonine (3), an alkamine of (1), was synthesized from chasmanine (2), the key intermediates being olefines (8), (13), 15-β-alcohols (10), (14) and 15-ketones (11), (15). And then isodelphonine (3) was converted to isodelphinine (1) by the selective O-acylations.
