反应详情

温度

0 °C

(2R)-1-[(Triisopropylsilyl)oxy]propan-2-ol (56.1 g, 242 mmol) was added to a solution of methyl 3-hydroxy-5-{[phenylmethyl]oxy}benzoate (50 g, 194 mmol) and triphenylphosphine (63.5 g, 242 mmol) in dry THF (500 mL), at to 0° C., followed by addition of DIAD (47.6 mL, 242 mmol) over 45 minutes under an argon atmosphere. The reaction was stirred at 0° C. for 1 hour and allowed to warm up to RT over an hour then stirred at RT for 1 hour. The THF was evaporated and a mixture of ethyl acetate (80 mL) and hexane (120 mL) was added. This mixture stirred for 2 hours and filtered. The precipitate was washed with a mixture of ethyl acetate (20 mL) and hexane (180 mL) and the filtrate evaporated. The residue was purified by column chromatography, eluting with 1:20 to 1:10 ethyl acetate:hexanes, to afford the title compound (65.5 g).

1. temperatureto warm up to RT over an hour
2. stirringthen stirred at RT for 1 hour
3. customThe THF was evaporated
4. additiona mixture of ethyl acetate (80 mL) and hexane (120 mL)
5. additionwas added
6. stirringThis mixture stirred for 2 hours
7. filtrationfiltered
8. washThe precipitate was washed with a mixture of ethyl acetate (20 mL) and hexane (180 mL)
9. customthe filtrate evaporated
10. customThe residue was purified by column chromatography
11. washeluting with 1:20 to 1:10 ethyl acetate