[OH:1][CH2:2][C:3]([CH3:7])([CH3:6])[C:4]#[N:5].[C:8]1([CH3:18])[CH:13]=[CH:12][C:11]([S:14](Cl)(=[O:16])=[O:15])=[CH:10][CH:9]=1>ClCCl.N1C=CC=CC=1.C(OCC)C>[CH3:18][C:8]1[CH:13]=[CH:12][C:11]([S:14]([O:1][CH2:2][C:3]([C:4]#[N:5])([CH3:7])[CH3:6])(=[O:16])=[O:15])=[CH:10][CH:9]=1To a solution of 3-hydroxy-2,2-dimethylpropanenitrile (0.5 g) in dichloromethane (8 mL) and pyridine (1.5 mL) is added at 0° C. p-toluene-sulfonylchloride (1.0 g) in portions. The mixture is stirred for 12 hours at room temperature, diluted with diethylether and washed with 1 M aqueous HCl solution and brine. After drying (MgSO4) the solvent is evaporated and the residue is chromatographed on silica gel (petrole ether/ethyl acetate 90:10→50:50) to give the title compound. Yield: 770 mg; Mass spectrum (ESI+): m/z=254 [M+H]+.
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