Water → 2-Methyl-4-(2-oxoethyl)benzonitrile
反応式
[C:1]([C:3]1[CH:8]=[CH:7][C:6]([CH:9]2[O:11][CH:10]2C([O-])=O)=[CH:5][C:4]=1[CH3:15])#[N:2].CC[O-].[Na+].O>C(O)C>[CH3:15][C:4]1[CH:5]=[C:6]([CH2:9][CH:10]=[O:11])[CH:7]=[CH:8][C:3]=1[C:1]#[N:2][C:1]([C:3]1[CH:8]=[CH:7][C:6]([CH:9]2[O:11][CH:10]2C([O-])=O)=[CH:5][C:4]=1[CH3:15])#[N:2].CC[O-].[Na+].O>C(O)C>[CH3:15][C:4]1[CH:5]=[C:6]([CH2:9][CH:10]=[O:11])[CH:7]=[CH:8][C:3]=1[C:1]#[N:2]A solution of 3-(4-cyano-3-methylphenyl)oxirane-2-carboxylate (927 mg, 4.0 mmol) in 5 mL of dry ethanol was cooled to 0° C. Freshly prepared EtONa (5 mmol) in 4 mL of ethanol was added and stirred at 0° C. for 10 min. Then dropwise addition of 0.1 g of water, stirred at 0° C. for 2 hours, and the sodium salt of the epoxy compound was filtered. The sodium salt of the epoxy compound was then dissolved in 5 mL of water and added 5 mL of 1 N of HCl and 20 mL of toluene. The mixture was heated to reflux for 2 hours. The organic phase was separated, washed by saturated sodium chloride, dried over Na2SO4 and distilled off solvent to afford crude 2-methyl-4-(2-oxoethyl)benzonitrile. MS m/z: 160 (M+1)+.
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