反应详情

To a solution of the compound prepared in Example 8(11) (1.00 g) in DMF (20 ml), t-butoxyamine hydrochloride (652 mg), triethylamine (0.8 ml), 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) hydrochloride (995 mg) and 1-hydroxybenzotriazole (HOBt) hydrate (795 mg) were added at 0° C. The mixture was stirred for 16 hours at room temperature. To the reaction mixture, ethyl acetate and water were added. The organic phase was washed with 0.1 N hydrochloric acid, a saturated aqueous solution of sodium bicarbonate, water and a saturated aqueous solution of sodium chloride, successively, dried over anhydrous magnesium sulfate and concentrated to give the title compound (1.35 g) having the following physical data.

1. washThe organic phase was washed with 0.1 N hydrochloric acid
2. dry with materiala saturated aqueous solution of sodium bicarbonate, water and a saturated aqueous solution of sodium chloride, successively, dried over anhydrous magnesium sulfate
3. concentrationconcentrated