[CH:1]1[CH:6]=[CH:5][C:4]([CH2:7][CH2:8][OH:9])=[CH:3][CH:2]=1.[C:10]([CH2:12][C:13](O)=[O:14])#[N:11]>CN(C=O)C.CN(C)C1C=CN=CC=1>[C:10]([CH2:12][C:13]([O:9][CH2:8][CH2:7][C:4]1[CH:5]=[CH:6][CH:1]=[CH:2][CH:3]=1)=[O:14])#[N:11]To a solution of β-phenethyl alcohol (3.6 ml, 30.0 mmol) in DMF (30 ml) was added cyanoacetic acid (2.55 g, 30.0 mmol) in DMF (20 ml) and the whole was cooled to 0° C. 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimido (4.66 g, 30.0 mmol) in DMF (5 ml) and 4-dimethylaminopyridine (0.37 g, 3.0 mmol) in DMF (10 ml) were then added to the mixture in that order at 0° C. and stirring was continued for 1 hour at this temperature and 18 hours at room temperature. The reaction mixture was concentrated in vacuo and purified by column chromatography to afford phenethyl cyanoacetate (2.49 g, 13.2 mmol).
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