References
Naya, K., Kotake, M.: Tetrahedron Lett. 1967, 1715
Francke, W., et al.: Angew. Chem. 90, 915 (1978); Baker, R., et al.: Chem. Commun. 1980, 52; Francke, W., et al.: Naturwissenschaften 67, 149 (1980)
Vité, J.P., et al.: ibid. 63, 582 (1976)
Schurig, V., et al.: Angew. Chem. 92, 473 (1980)
Francke, W., et al.: Naturwissenschaften 64, 590 (1977)
Mori, K., et al.: Tetrahedron 35, 1601 (1979)
The compounds were first described by Ponomarev, A.A.: Dokl. Akad. Nauk S.S.S.R. 87, 983 (1952); 100, 917 (1955)
Francke, W., Reith, W.: Liebigs Ann. Chem. 1979, 1
Schurig, V., et al.: Angew. Chem. 90, 993 (1978)
The stereochemistry is reminiscent to that reported recently for spiro-β-diketones: Shingu, K., et al.: Tetrahedron Lett. 1980, 1243
Silverstein, R.M., et al.: ibid. 1978, 3231
Schurig, V., et al.: J. Chromatogr. 99, 147 (1974)
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V.S. thanks the Deutsche Forschungsgemeinschaft and Fonds der Chemischen Industrie for support and Firma Haarmann and Reimer, Holzminden, W.Germany, for a gift of R-pulegone.
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Weber, R., Hintzer, K. & Schurig, V. Enantiomer resolution of spiroketals. Naturwissenschaften 67, 453–456 (1980). https://doi.org/10.1007/BF00405641
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DOI: https://doi.org/10.1007/BF00405641