1,4-Dioxane hydrochloride → 2-[(4-Aminomethyl-benzyl)-(4-dipropylamino-butyl)-amino]-malonic acid diethyl ester

Participants

Reaction Steps

The compound (421 mg) obtained in Example 89-1 was dissolved in anhydrous ethanol (4.0 ml) and added with a 4 mol/l hydrogen chloride/dioxane solution (4.00 ml) and the whole was stirred at room temperature for 3 hours. After completion of the reaction, the solvent was distilled off. The resultant was added with a 1 mol/l sodium hydroxide aqueous solution and the whole was subjected to extraction with chloroform and washed with a saturated saline solution. The organic layer was dried with anhydrous sodium sulfate. The solvent was distilled off, thereby obtaining the subject compound (338 mg) as a pale-yellow oily substance.

Provenance & Evidence