反应详情

A solution of 1,1-dimethylethyl [[(2S,3R) 3-(1,3-dihydroxypropyl)-1,4-dioxaspiro[4,5]dec-2-yl]methoxy]acetate (50 g, 138 mmol) in acetone (350 mL) was treated with a solution of periodate (50 g, 235 mmol, 1.7 eq) in water (1.2 L). The reaction mixture was stirred vigorously under nitrogen and monitored by TLC. After about 4 hours, the reaction was complete by TLC analysis. Acetone was removed under reduced pressure without heating. The reaction mixture was extracted with ethyl acetate (3×500 mL). The combined organic layers were dried and concentrated under reduced pressure without heating to give 40 g of 1,1-dimethylethyl [[(2S,3S) 3-formyl-1,4-dioxaspiro[4,5]dec-2-yl]methoxy]acetate as a clear oil: [α]D=−1.142 (10.147 mg/cc in MeOH); 1H NMR (CDCl3) δ1.38 (m, 2H), 1.42 (s, 9H), 1.61 (m, 8H), 1.73 (m, 2H), 3.52 (dd, 1 H), 3.72 (dd, 1 H), 3.88 (s, 2H), 4.38 (dd, 1 H), 4.52 (m, 1H), 9.62 (s, 1H) ppm.

1. customAcetone was removed under reduced pressure
2. temperaturewithout heating
3. extractionThe reaction mixture was extracted with ethyl acetate (3×500 mL)
4. customThe combined organic layers were dried
5. concentrationconcentrated under reduced pressure
6. temperaturewithout heating