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Communication | Regular issue | Vol 26, No. 3, 1987, pp.607-611
Published online, 1st January, 1970
DOI: 10.3987/R-1987-03-0607
The Formation and X-Ray Crystal Structure of a Novel Bridged Dilactone Derived from Chrysanthemic Acid by Dimerization of Lavandulylic Acids

Zeev Goldschmidt, Bernard Crammer, and Hugo E. Gottlieb

*Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel

Abstract

Thermal acid catalysed rearrangement of chrysanthemic acid or its ethyl ester afforded 5,8-[1-(2-methylpropyl)]-ethano-3,3,8- trimethyl-5-(2-methylethyl)-3,4,4a,5,8,8a-hexahydro-1H,6H-pyrano[3,4-c]- pyran-1,6-dione, the structure of which was confirmed by X-ray analysis.