REFERENCES
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- Use of chloroform was found to be necessary and its replacement by methylene chloride led to 1a in low yield (10–18%)
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- Spectral data for 1 and 3 were in agreement with reported data.2,9la: 13C NMR (D2O, 75 MHz) δ: 17.1, 17.9, 36.2, 40.2, 40.8, 42.6, 45.9, 57.1, 129.0, 131.6. 1b: 13C NMR (D2O, 75 MHz) δ: 43.1, 43.2, 45.1, 48.6, 57.1, 132.2, 136,1. 3a: 13C NMR (CDCl3. 75 MHz) δ: 21.5, 27.7, 41.3, 41.8, 43.8, 44.4, 45.4, 45.8, 51.2. 3b: 13C NMR (CDCl3, 75 MHz) δ: 43.6, 43.5
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