CHEMISTRY LETTERS, pp. 1195-1196, 1983. (C) The Chemical Society of Japan 1983 FORMAL SYNTHESIS OF (+)-IPALBIDINE Hideo IIDA, Yohya WATANABE, and Chihiro KIBAYASHI* Tokyo College of Pharmacy, Hachioji, Horinouchi, Tokyo 192-03 1-Aza-3-(4-methoxyphenyl) bicyclo [4, 3, 0]nonan-4-one, key inter- mediate to (+)-ipalbidine, was conveniently synthesized by intra- molecular cyclization of the N-formylketone which was obtained via ...