反应详情

According to Scheme 9 Step 2: To a solution of ethyl 2-(5-(4-methoxyphenyl)-2-oxopyridin-1(2H)-yl)acetate (1 eq, 3.38 mmol, 0.97 g) in water/EtOH (1:1, 20 mL) at 0° C. was added lithium hydroxide (10 eq, 33.8 mmol, 1.44 g). The reaction was then allowed to warm to room temperature and stirred for 2 hours. The reaction was then cooled to 0° C. and acidified with HCl 1M solution till pH=2. The resulting precipitate was filtered under reduced pressure to yield 2-(5-(4-methoxyphenyl)-2-oxopyridin-1(2H)-yl)acetic acid (2.56 mmol, 0.66 g, 76%) as a white solid.

1. temperatureThe reaction was then cooled to 0° C.
2. filtrationThe resulting precipitate was filtered under reduced pressure