反应详情

温度

0 °C

To tert-butyl 3-(2-(2-(2-hydroxyethoxy)ethoxy)ethoxy)propanoate (10 g, 35.97 mmol, 1.00 equiv) in pyridine (40 mL) was added 4-methylbenzene-1-sulfonyl chloride (6.8 g, 35.79 mmol, 1.00 equiv), in portions at 0° C. The resulting solution was stirred for 4 h at 0° C. and then concentrated under vacuum. The residue was dissolved in 30 mL of dichloromethane, washed with 3×20 mL of 3% hydrochloric acid (aq) and 20 mL of brine, and then dried over sodium sulfate. The solution was concentrated under vacuum to afford 14 g (90%) of tert-butyl 3-(2-(2-(2-(tosyloxy)ethoxy)ethoxy)ethoxy)propanoate as a yellow oil.

1. customat 0° C
2. concentrationconcentrated under vacuum
3. dissolutionThe residue was dissolved in 30 mL of dichloromethane
4. washwashed with 3×20 mL of 3% hydrochloric acid (aq) and 20 mL of brine
5. dry with materialdried over sodium sulfate
6. concentrationThe solution was concentrated under vacuum