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- The reaction can also be carried out in the absence of crown ether when diglyme is employed as the solvent. However, the overall yields of II and III are somewhat lower
- All melting points and boiling points are uncorrected. Infrared spectra were recorded on a Beckman IR-10 spectrophotometer. NMR spectra were taken on a JEOL C-60 HL spectrometer. Mass spectra were measured on a VG 7070F mass spectrometer. Microanalysis was performed at Australian Microanalytical Service, Melbourne. All new compounds gave satisfactory spectrosopic and combustion data (C: ±0.3% H: ±-0.2%)