Acetone → HCID 44603856, compound

Reaction equation

[Si]([C:5]#[N:6])(C)(C)C.[NH2:7][C:8]1[CH:13]=[CH:12][C:11]([CH2:14][CH2:15][CH2:16][C:17]#[N:18])=[CH:10][CH:9]=1.[CH3:19][C:20]([CH3:22])=O>[Cl-].[Cl-].[Zn+2]>[C:5]([C:20]([NH:7][C:8]1[CH:9]=[CH:10][C:11]([CH2:14][CH2:15][CH2:16][C:17]#[N:18])=[CH:12][CH:13]=1)([CH3:22])[CH3:19])#[N:6]

Participants

Procedure

TMSCN (0.3 mL, 2.25 mmol) was added to a mixture of compound 83 (120 mg, 0.75 mmol), acetone (0.33 mL, 4.5 mmol) and ZnCl2 (10 mg, 0.08 mmol) with stirring. The reaction mixture was stirred at room temperature for 1 h, and concentrated in vacuo. The residue was diluted with water, and extracted with DCM. The combined organic layers were washed with brine, dried over Na2SO4 and concentrated to dryness to give compound 84 (170 mg, 99%) as a light yellow oil. The crude product was used directly for the next step without purification. 1H NMR (400 MHz, CDCl3) δ7.08 (d, 2H, J=8.1 Hz), 6.88 (d, 2H, J=8.1 Hz), 2.72 (t, 2H, J=7.4 Hz), 2.32 (t, 2H, J=7.4 Hz), 1.90-2.00 (m, 2H), 1.69 (s, 6H).