反应详情

The trans-ethyl 2-methanesulfonyloxymethyl-1-cyclopropanecarboxylate from the previous step (1.655 g, 7.45 mmol) was dissolved in dry dimethyl sulfoxide (20 ml), treated with sodium azide (0.969 g, 14.89 mmol), and stirred at room temperature for 16 h. (tlc indicated no substrate left). After dilution with water, (50 ml), the reaction mixture was extracted with ether (3×50 ml) and the combined organic extracts washed several times (×6) with water and then brine (×3). After drying on anhydrous magnesium sulfate, evaporation of the solvent under reduced pessure gave an oil. Bulb to bulb distillation gave a clear liquid; 1.178 g (93%); bp 86°-90° C./4.0 mm Hg (air bath temperature); ir (film) νmax : 2090 (N3), 1725 cm-1 (C=0); -1Hmr (CDCl3) δ: 4.13 (2H, q, J=7, CH2 --CH3), 3.21 (2H, d, J= 6, CH2 --OMs), 2.0-0.6 (4H, m, cyclopropyl), 1.23 (3H, t, 5.7 CH2 --CH3). Anal. calcd for C7H11N3O2 : C 49.69, H 6.55, N 24.83; found: C 49.81, H 6.71, N 24.29.

1. waitno substrate left)
2. extractionAfter dilution with water, (50 ml), the reaction mixture was extracted with ether (3×50 ml)
3. washthe combined organic extracts washed several times (×6) with water
4. dry with materialAfter drying on anhydrous magnesium sulfate, evaporation of the solvent
5. customgave an oil
6. distillationBulb to bulb distillation
7. customgave a clear liquid