[CH:1]([N:14]1[CH2:17][C:16](=O)[CH2:15]1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl.[CH3:20][NH2:21].C(O)(=O)C.[C-:26]#[N:27].[K+]>CO>[CH:1]([N:14]1[CH2:17][C:16]([NH:27][CH3:26])([C:20]#[N:21])[CH2:15]1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1To a solution of 1-benzhydrylazetidin-3-one (2.13 g, 8.98 mmol) in methanol (17 ml) was added methylamine hydrochloride (1.21 g, 18.0 mmol) and then acetic acid (1.03 ml, 18.0 mmol) at room temperature. After stirring for 5 minutes, solid KCN (1.17 g, 18.0 mmol) was added and the mixture was heated to 60° C. for 19 hours. The reaction was cooled; the solid product was collected by vacuum filtration, rinsed with methanol, and then dried, in vacuo, to afford I-3A-2a as a colorless solid (2.50 g, quantitative): +ESI MS (M+1) 278.3; 1H NMR (400 MHz, CD2Cl2) δ 7.43 (d, J=7.5 Hz, 4H), 7.29 (t, J=7.5 Hz, 4H), 7.23 (t, J=7.3 Hz, 2H), 4.45 (s, 1H), 3.55 (d, J=7.5 Hz, 2H), 3.15 (d, J=7.1 Hz, 2H), 2.40 (s, 3H).
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