反应详情

1.8 g of methyl (+)-3-(6-amidino-2-indolyl)-2-[4-[((3S)-3-pyrrolidinyl)oxy]phenyl]propionate dihydrochloride was dissolved in. 60 ml of concentrated hydrochloric acid, and the solution was stirred at 5° C. for 7 days. After concentrating the resulting reaction solution to dryness under a reduced pressure at a temperature of 50° C. or below, the thus obtained residue was subjected to reversed phase high performance liquid chromatography using a column packed with octadecyl-bonded silica gel and using a water/acetonitrile mixture as an elution solvent. Thereafter, thus eluted fractions of interest were pooled, mixed with dilute hydrochloric acid, and then concentrated to dryness. In this way, 1.3 g of the title compound was obtained in a solid form.

1. concentrationAfter concentrating
2. customthe resulting reaction solution to dryness under a reduced pressure at a temperature of 50° C. or below
3. concentrationconcentrated to dryness