4-(Diethoxymethyl)benzaldehyde → Benzenemethanol, 4-(diethoxymethyl)-

Temperatur

0 °C

4-(Diethoxymethyl)benzaldehyde (10 g, 48 mmol) was dissolved in methanol (200 ml) and cooled to 0° C. NaBH4 (4.54 g, 120 mmol, 2.5 eq) was then added slowly and the reaction mixture was stirred for 1 hour, after which the solvent was evaporated. The residue obtained was dissolved in ethyl acetate (100 ml) and water (100 ml), the phases were separated and the organic phase was washed with water (100 ml), dried over magnesium sulphate, and evaporated to yield 1 as a clear oil (10.09 g, 48 mmol, 100%). 1H NMR (300 MHz, CDCl3) δ=7.48 (d, 3J(H,H)=8.1 Hz, 2H, ArCH α to CH2OH), 7.37 (d, 3J(H,H)=8.1 Hz, 2H, ArCH α to CH(OEt)2), 5.51 (s, 1H, CH(OEt)2), 4.70 (d, 3J(H,H)=5.9 Hz, 2H, CH2OH), 3.61 (dq, 3J(H,H)=7.1 Hz, 2J(H,H)=9.5 Hz, 2H, CH2CH3), 3.56 (dq, 3J(H,H)=7.1 Hz, 2J(H,H)=9.5 Hz, 2H, CH2CH3), 1.75 (t, 3J(H,H)=5.9 Hz, 1H, CH2OH), 1.24 (t, 3J(H,H)=7.1 Hz, 6H, CH2CH3); 13C NMR (75 MHz, CDCl3) δ=140.9 (ArCCH2OH), 138.6 (ArCCH(OEt)2), 126.9 (ArCH α to ArCCH2OH), 126.8 (ArCH α to ArCCH(OEt)2), 101.3 (CH(OEt)2), 65.1 (CH2OH), 61.0 (OCH2CH3), 15.2 (OCH2CH3).

1. customafter which the solvent was evaporated
2. customThe residue obtained
3. customwater (100 ml), the phases were separated
4. washthe organic phase was washed with water (100 ml)
5. dry with materialdried over magnesium sulphate
6. customevaporated

ORD-Eintrag

ord-04fa5ba0ecb847eb909e30a2c4f1f988

Quelldatensatz

uspto-grants-2015_12

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09222941B2