The Synthesis and ¹³C-NMR Spectrum of 1,4-Dioxaspiro(4.5)deca-6,9-dien-2,8-dione

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• mp (benzene-pentane): softens 58–62, melts 62–64°C. Satisfactory elemental analysis by Guelph Chemical Laboratories Ltd. Infrared: CH2C12; 1820. (lactone), 1685, 1650cm-1 (cyclohexadienone).max Ultraviolet spectrum: ; 220. (logε 3.98) and 244. nm (logε 3.91). 1H-nmr ; 6.33. (2H, d, J=10. Hz) for HA, 6.85. (2H, d, J=10Hz) for HB and 4.55. ppm (2H, s) for HC
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• The financial assistance of the Natural Sciences and Engineering Research Council of Canada and the Research Board of the University of Manitoba is gratefully acknowledged
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