تفاعل #44607

معادلة التفاعل

tert-butyldiphenylsilyl chloride

DMF

[(1R,2R)-2-hydroxy-1-(3,4,5-trifluorophenyl)propyl]-carbamic acid tert-butyl ester

imidazole

→

title compound

[(1R,2R)-2-(tert-butyldiphenylsilanyloxy)-1-(3,4,5-trifluorophenyl)propyl]carbamic acid tert-butyl ester

المذيبات

water

ethyl acetate

ظروف التفاعل

المعالجة

1. 1
   أخرىThe organic layer was separated
2. 2
   غسيلwashed with 1 N hydrochloric acid, water
3. 3
   تجفيفThe organic layer was dried over anhydrous magnesium sulfate
4. 4
   تركيزconcentrated under reduced pressure
5. 5
   أخرىThe residue was purified by silica gel column chromatography (eluting solvent: hexane:diethylether=49:1 to 19:1)

الإجراء التجريبي

In nitrogen atmosphere, tert-butyldiphenylsilyl chloride (2.0 mL) was added dividedly four times to a DMF solution (3 mL) of [(1R,2R)-2-hydroxy-1-(3,4,5-trifluorophenyl)propyl]-carbamic acid tert-butyl ester (610 mg) and imidazole (817 mg). This reaction solution was stirred at room temperature for 3 hr. To the reaction solution, ethyl acetate and water were added. The organic layer was separated, washed with 1 N hydrochloric acid, water, a saturated sodium hydrogencarbonate aqueous solution, and saturated saline in this order. The organic layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluting solvent: hexane:diethylether=49:1 to 19:1) to give 684 mg of the title compound. The physical property values of this compound were as follows:

المصدر