تفاعل #5807

معادلة التفاعل

water

diethyl ether

(R)-1,1-dimethylethyl 6-cyano-5-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-3-oxohexanoate

tetrabutylammonium fluoride

→

(R)-1,1-dimethylethyl 6-cyano-5-hydroxy-3-oxohexanoate

المذيبات

tetrahydrofuran

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONis added
2. 2
   أخرىthe layers separated
3. 3
   تجفيفThe organic layer is dried (magnesium sulfate)
4. 4
   ترشيحfiltered through a plug of silica gel with the aid of anhydrous diethyl ether
5. 5
   أخرىThe solvent is removed under a vacuum

الإجراء التجريبي

A solution of crude (R)-1,1-dimethylethyl 6-cyano-5-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-3-oxohexanoate, 43 g (0.126 mol) in 350 mL of tetrahydrofuran is treated with 213 mL of tetrabutylammonium fluoride solution (1.0M in hexane). The resulting mixture is stirred for five hours, at 25° C. The mixture is treated with 500 mL of water, 300 mL of diethyl ether is added, and the layers separated. The organic layer is dried (magnesium sulfate) and then filtered through a plug of silica gel with the aid of anhydrous diethyl ether. The solvent is removed under a vacuum to obtain 21 g of crude (R)-1,1-dimethylethyl 6-cyano-5-hydroxy-3-oxohexanoate with acceptable NMR, MS and IR spectra.

المصدر