[O:1]1[CH2:4][C:3](=[CH:5][C:6]#[N:7])[CH2:2]1.[C:8]1([CH2:14][NH2:15])[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1>>[CH2:14]([NH:15][C:3]1([CH2:5][C:6]#[N:7])[CH2:4][O:1][CH2:2]1)[C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1A mixture of oxetan-3-ylidene-acetonitrile (950 mg, 10 mmol) and phenylmethanamine (1.31 ml, 12 mmol) was heated with stirring at 60° C. for 5 hours under nitrogen. The mixture was concentrated in vacuo. The residue was purified by flash column (eluting with 0-50% ethyl acetate in hexane) to afford 1.65 g of 3-(benzylamino)oxetan-3-acetonitrile as a colorless oil (yield was 81.7%).
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