反应详情

To a mixture of 1-(4-isothiocyanatophenyl)-4-methylpiperazine (of Example 1; 1.0 g, 4.3 mmol) and cyanamide (0.2 g, 4.8 mmol) in acetonitrile (43 mL), a solution of potassium tert-butoxide (43 mL, 0.1 M in tert-BuOH) was added. After 30 minutes at room temperature, 2-bromo-1-(4-chloro-3-nitro-phenyl)ethanone (1.2 g, 4.3 mmol) (Maybridge Chemical Company Ltd.) was added. The reaction mixture was stirred for 4 h and then poured into 50 mL of water. The product was collected by filtration, washed with water and diethyl ether. The yellow powder was dried in vacuo to provide 0.9 g (45% yield) of [4-amino-2-[[4-(4-methyl-1-piperazinyl)phenyl]amino]-5-thiazolyl](4-chloro-3-nitrophenyl)methanone.

1. filtrationThe product was collected by filtration
2. washwashed with water and diethyl ether
3. customThe yellow powder was dried in vacuo