反应详情

To a solution of (3-{(S)-2-[(R)-2-(8-benzyloxy-2-oxo-1,2-dihydroquinolin-5-yl)-2-(tert-butyldimethylsilanyloxy)ethylamino]propyl}phenyl)acetic acid methyl ester (810 mg, 1.3 mmol) in a 3:2:1 mixture of THF/MeOH/water (4 mL) was added lithium hydroxide (158 mg, 6.59 mmol). The resulting mixture was stirred at room temperature for 3 hours and then acidified to pH 6 with concentrated aqueous hydrochloric acid. This mixture was concentrated under reduced pressure to give a yellow solid (307 mg, 39% yield), which was used in the next reaction without further purification.

1. concentrationThis mixture was concentrated under reduced pressure