Reaktion #220974

Reaktionsgleichung

ethyl 3-(4-methoxyphenyl)-3-oxopropanoate

sodium borohydride

→

title compound

Ausbeute 56.2%

Ethyl 3-hydroxy-3-(4-methoxyphenyl)propanoate

Ausbeute 56.2%

Lösungsmittel

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONAfter addition
2. 2
   Sonstigeto quench
3. 3
   Sonstigethe reaction
4. 4
   SonstigeMethanol was removed in vacuo, and water
5. 5
   workup.ADDITIONwas added to the residue
6. 6
   Trocknenthe combined organic layers were dried over anhydrous sodium sulfate
7. 7
   Filtrationfiltered
8. 8
   SonstigeThe filtrate was evaporated in vacuo
9. 9
   SonstigeThe crude mixture was purified by Flash Chromatography with eluent of 40% ethyl acetate/60% hexane

Vorschrift

A solution of ethyl 3-(4-methoxyphenyl)-3-oxopropanoate (444 mg, 2 mmol) in methanol (4 mL) was added sodium borohydride (76 mg, 2.0 mmol) at 0° C. slowly. After addition, the reaction mixture was stirred at 0° C. for 30 min. Two drops of saturated sodium sulfate solution were added to the reaction mixture to quench the reaction. Methanol was removed in vacuo, and water was added to the residue. The aqueous solution was extrated with ethyl acetate (x3), and the combined organic layers were dried over anhydrous sodium sulfate, and filtered. The filtrate was evaporated in vacuo. The crude mixture was purified by Flash Chromatography with eluent of 40% ethyl acetate/60% hexane to give the title compound as a clear oil (252 mg, 56% yield). 1H NMR (400 MHz, CDCl3) δ 1.22-1.28 (m, 3 H) 2.63-2.75 (m, 2 H) 3.79 (s, 3 H) 4.16 (q, J=7.13 Hz, 2 H) 5.07 (dd, J=9.06, 3.78 Hz, 1 H) 6.85-6.89 (m, 2 H) 7.24-7.31 (m, 2 H). HPLC retention time: 1.973 min (method A). MS (ESI) (M+Na)+ 246.96.

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