反应详情

1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate (1.5 g) was dissolved in DMF (50 mL). Potassium carbonate (1.7 g) and N-(4-chloromethyl-3-methyl-1,3-thiazol-2(3H)-ylidene)-N-methylamine hydrochloride (1.4 g) were added thereto, and the mixture was mixed at 80° C. overnight. The solvent was distilled off, the residue was poured into water, extracted with a mixed solution of chloroform-methanol, and the extract was dried over anhydrous magnesium sulfate. The solvent was distilled off to give tert-butyl 4-(((2Z)-3-methyl-2-(methylimino)-2,3-dihydro-1,3-thiazol-4-yl)methyl)-3-oxopiperazine-1-carboxylate (1.2 g) as a pale brown oily matter. The resulting oily matter was dissolved in trifluoroacetic acid (10 mL) and mixed at room temperature for 1 hour. The mixture was dissolved in dichloromethane (50 mL), and triethylamine (0.87 mL) was added thereto. With ice cooling, 3-((6-chloro-2-naphthyl)sulfonyl)propionic acid (0.97 g), HOBt (0.53 g) and WSC (0.65 g) were added thereto, and the mixture was mixed at room temperature for 16 hours. The reaction solution was basified with an aqueous potassium carbonate solution, then extracted with chloroform, and the extract was dried over anhydrous magnesium sulfate. The solvent was distilled off, and the residue was purified with a basic silica gel column to give the title compound (1.8 g) as a white powder.

1. additionthe mixture was mixed at 80° C. overnight
2. distillationThe solvent was distilled off
3. additionthe residue was poured into water
4. extractionextracted with a mixed solution of chloroform-methanol
5. dry with materialthe extract was dried over anhydrous magnesium sulfate
6. distillationThe solvent was distilled off