1,1'-Thiocarbonyldiimidazole → 1-(4-Isothiocyanatophenyl)-4-(1-methylethyl)piperazine
반응식
[CH3:1][CH:2]([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)[CH3:3].[C:17](N1C=CN=C1)(N1C=CN=C1)=[S:18]>CN(C)C=O>[N:16]([C:13]1[CH:14]=[CH:15][C:10]([N:7]2[CH2:8][CH2:9][N:4]([CH:2]([CH3:1])[CH3:3])[CH2:5][CH2:6]2)=[CH:11][CH:12]=1)=[C:17]=[S:18]참가 물질
4
반응 조건
- 온도
- -15 °C
실험 절차
A solution of 4-[4-(1-methylethyl)-1-piperazinyl]benzenamine (1.6 g,˜6.8 mmol) (from Step B above) in N,N-dimethylformamide (25 mL) was added dropwise over 20 min to a cooled (−15° C.) solution of thiocarbonyldiimidazole (1.4 g, 7.7 mmol) (Aldrich) in N,N-dimethylformamide (30 mL). After the addition was complete, the mixture was stirred at −15° C. for 20 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. The ether layer was dried (MgSO4), filtered, and evaporated to give 1-(4-isothiocyanatophenyl)-4-(1-methylethyl)piperazine (1.8 g, quantitative yield).