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Communication | Regular issue | Vol 23, No. 7, 1985, pp.1629-1633
Published online, 1st January, 1970
DOI: 10.3987/R-1985-07-1629
A Chiral Route to Pyrrolizidine Alkaloids via Intramolecular Michael Reaction

Kozo Shishido, Yuko Sukegawa, Keiichiro Fukumoto,* and Tetsuji Kametani

*Pharmaceutical Institute, Tohoku University, Aobayama, Sendai 980-8578, Japan

Abstract

Wittig-Horner reaction of 10 gave the pyrrole (11) as a diastereomeric mixture via the intramolecular Michael reaction, one of the diastereomers could be converted to the Geissman lactone (4), a synthon for some pyrrolizidine alkaloids.