Lithium Hydroxide → (3-Chloro-2H-pyrazolo[3,4-b]pyridin-2-yl)acetic acid

Participants

Reaction Steps

(3-Chloro-pyrazolo[3,4-b]pyridin-2-yl)-acetic acid ethyl ester was treated with 1N lithium hydroxide (LiOH) (1 equiv) in 1 mL of MeOH to provide 2-(3-Chloro-pyrazolo[3,4-b]pyridine-2-yl)-acetic acid, which was used as directly in subsequent reactions without further purification: LCMS (ES) M+H 212.0, Rf 0.34 min (Agilent Zorbax SB-C18, 2.1×50 mm, 5μ, 35° C., 1 ml/min flow rate, a 2.5 min gradient of 20% to 100% B with a 1.1 min wash at 100% B; A=0.1% formic acid/5% acetonitrile/94.9% water, B=0.1% formic acid/5% water/94.9% acetonitrile).

Provenance & Evidence