反应详情

1.1 g (2.06 mmol) of 1-methyl-2-[N-(4-amidinophenyl)aminomethyl]benzimidazol-5-yl-carboxylic acid-N-phenyl-N-(2-ethoxycarbonylethyl)amide hydrochloride was dissolved in a mixture of 40 mL of tetrahydrofuran and 10 mL of water, then 570 mg (4.12 mmol) of potassium carbonate and 362 mg (2.2 mmol) of n-hexyl chloroformate were added and stirred for two hours at room temperature. The solvent was then distilled off, the residue was mixed with about 50 mL of saturated saline solution and the resulting solution was extracted three times with 20 mL of dichloromethane. The extracts were dried over sodium sulfate and evaporated down. The crude product thus obtained was purified by column chromatography (100 g silica gel; dichloromethane+5% ethanol). Yield: 78% of theory, C35H42N6O5 (626.8); Rf value: 0.49 (silica gel; dichloromethane/ethanol=19:1); EKA mass spectrum: (M+H)+=627; (M+H+Na)++=325; (M+2H)++=314.

1. distillationThe solvent was then distilled off
2. additionthe residue was mixed with about 50 mL of saturated saline solution
3. extractionthe resulting solution was extracted three times with 20 mL of dichloromethane
4. dry with materialThe extracts were dried over sodium sulfate
5. customevaporated down