反应详情

A suspension was prepared containing 1.64 g (5.74 mmol) of 6-chloropurine riboside in 12 ml of absolute ethanol. To the solution was added 0.72 g (5.7 mmol) of 2-(2-methyl-imidazol-1-yl) ethylamine (prepared in accordance with Z.Obsch. Chim. 11, 545 (1941); Chem Ab. 1941 6938) and 0.81 g (8.0 mmol) of triethylamine. The reaction mixture was heated under reflux for 77 hours. The solvent was removed in vacuo and chromatography of the residue on silica gel was performed by eluting with a mixture of 22 parts methanol, 88 parts methylene chloride, and one part ammonium hydroxide. The title compound was obtained as the free base yielding 1.2 g (55% yield). This material was converted to the hydrochloride salt by suspending in 20 ml of water at 0° and adding 1 normal hydrochloric acid until a pH of 2.6 was attained. The solution was frozen and lyophilized giving a white powder which was passed through a column of cellulose powder eluting with a mixture of 85 parts n-butanol and 15 parts water. The appropriate fractions were combined and concentrated to give a glass which was azeotroped twice with water and then dissolved in water, frozen and lyophilized giving 1.1 g (44% yield) of the title compound as a white powder.

1. customA suspension was prepared
2. temperatureThe reaction mixture was heated
3. temperatureunder reflux for 77 hours
4. customThe solvent was removed in vacuo and chromatography of the residue on silica gel
5. washby eluting with a mixture of 22 parts methanol, 88 parts methylene chloride, and one part ammonium hydroxide