1,1'-Thiocarbonyldiimidazole → 1-(Acetyl)-4-(4-isothiocyanatophenyl)piperazine
반응식
[C:1]([N:4]1[CH2:9][CH2:8][N:7]([C:10]2[CH:15]=[CH:14][C:13]([NH2:16])=[CH:12][CH:11]=2)[CH2:6][CH2:5]1)(=[O:3])[CH3:2].[C:17](N1C=CN=C1)(N1C=CN=C1)=[S:18]>CN(C)C=O>[C:1]([N:4]1[CH2:5][CH2:6][N:7]([C:10]2[CH:15]=[CH:14][C:13]([N:16]=[C:17]=[S:18])=[CH:12][CH:11]=2)[CH2:8][CH2:9]1)(=[O:3])[CH3:2]참가 물질
4
반응 조건
- 온도
- -15 °C
실험 절차
A solution of 1-acetyl-4-(4-aminophenyl)piperazine (1.0 g, 4.6 mmol) (from Step B above) in N,N-dimethylformamide (10 mL) was added dropwise to a cooled (−15° C.) solution of thiocarbonyldiimidazole (855 mg, 4.8 mmol) in N,N-dimethylformamide (10 mL). After the addition was complete, the mixture was stirred at −15° C. for 30 min, then the cooling bath was removed and the solution was stirred for 1 h. Ice-water was added and the mixture was extracted with ether (4×50 mL). The combined ether layers were washed with brine, dried (MgSO4), filtered, and evaporated to give 1-(acetyl)-4-(4 isothiocyanatophenyl)piperazine (1.0 g, 84%).