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Communication | Regular issue | Vol 26, No. 12, 1987, pp.3077-3079
Published online, 1st January, 1970
DOI: 10.3987/R-1987-12-3077
New Route to Phthalideisoquinoline Alkaloids: Synthesis of (±)-Cordrastine I and II

Kazuhiko Orito, Hiroshi Suginome, S. Osmund De Silva, and Russel Rodrigo

*Division of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0828, Japan


Acid-catalyzed isomerization of the keto-lactone (3) provided the immonium salt (6), sodium borohydride reduction of which gave (±)-cordrastine I (7) and II (8) after acid treatment.