[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]([N:16]2[C:24]3[C:19](=[C:20]([N:25](COCC[Si](C)(C)C)[S:26]([CH3:29])(=[O:28])=[O:27])[CH:21]=[CH:22][CH:23]=3)[CH:18]=[N:17]2)([CH:11]2[CH2:13][CH:12]2[C:14]#[N:15])[CH2:9][CH3:10])=[CH:4][CH:3]=1>Cl.CCO>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]([N:16]2[C:24]3[C:19](=[C:20]([NH:25][S:26]([CH3:29])(=[O:28])=[O:27])[CH:21]=[CH:22][CH:23]=3)[CH:18]=[N:17]2)([CH:11]2[CH2:13][CH:12]2[C:14]#[N:15])[CH2:9][CH3:10])=[CH:4][CH:3]=1A mixture of N-(1-(1-(4-chlorophenyl)-1-(2-cyanocyclopropyl)propyl)-1H-indazol-4-yl)-N-((2-(trimethylsilyl)ethoxy)methyl)methanesulfonamide (14 mg) in 2 N HCl/EtOH (1 mL/1 mL) was stirred at 50° C. for 3 h, cooled to room temperature, concentrated, and extracted with ethyl acetate (10 mL). The organic layers were combined, dried over anhydrous sodium sulfate, and concentrated in vacuo. The residue was purified using a silica gel column (PE/EA=3/1) to afford the title compound as a brown solid. LC/MS m/z=429.1 [M+H]+.
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