Reaktion #44635

Reaktionsgleichung

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

Lösungsmittel

water

ethyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe resulting reaction solution
2. 2
   SonstigeThe organic layer was separated
3. 3
   Waschenwashed with 1 N hydrochloric acid, water
4. 4
   TrocknenThen, the organic layer was dried over anhydrous magnesium sulfate
5. 5
   Einengenconcentrated under reduced pressure
6. 6
   SonstigeThe residue was purified by silica gel column chromatography (hexane:diethyleter=49:1 to 19:1)

Vorschrift

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). The resulting reaction solution was stirred at room temperature for 3 hr, and ethyl acetate and water were added thereto. The organic layer was separated and washed with 1 N hydrochloric acid, water, a saturated sodium hydrogencarbonate aqueous solution, and saturated saline in this order. Then, the organic layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:diethyleter=49:1 to 19:1) to give 684 mg of the title compound. The physical property values of this compound were as follows:

Quelle