Trifluoroacetic acid → 1-[[4-(2,6-Dimethylpyridin-4-yl)-2-methylphenyl]methyl]piperazine
反応式
[CH3:1][C:2]1[CH:7]=[C:6]([C:8]2[CH:13]=[CH:12][C:11]([CH2:14][N:15]3[CH2:20][CH2:19][N:18](C(OC(C)(C)C)=O)[CH2:17][CH2:16]3)=[C:10]([CH3:28])[CH:9]=2)[CH:5]=[C:4]([CH3:29])[N:3]=1.FC(F)(F)C(O)=O>ClCCl>[CH3:29][C:4]1[CH:5]=[C:6]([C:8]2[CH:13]=[CH:12][C:11]([CH2:14][N:15]3[CH2:20][CH2:19][NH:18][CH2:17][CH2:16]3)=[C:10]([CH3:28])[CH:9]=2)[CH:7]=[C:2]([CH3:1])[N:3]=1参加物
4
実験手順
A 50 mL round-bottom flask maintained with an inert atmosphere of nitrogen was charged with tert-butyl 4-[[4-(2,6-dimethylpyridin-4-yl)-2-methylphenyl]methyl]piperazine-1-carboxylate (350 mg, 0.880 mmol, 1.00 equiv) and dichloromethane (5 mL). Trifluoroacetic acid (0.5 mL) was added dropwise at 0° C. The resulting solution was stirred for 5 h at room temperature. The reaction progress was monitored by LCMS. The reaction was then quenched by the addition of water (10 mL). The resulting solution was extracted with dichloromethane (3×10 mL) and the organic layers were combined, washed with brine (2×10 mL), dried over anhydrous sodium sulfate and concentrated under reduced pressure to yield 270 mg (crude) of 1-[[4-(2,6-dimethylpyridin-4-yl)-2-methylphenyl]methyl]piperazine as yellow oil. LCMS (ESI, m/z): 296 [M+H]+.