Potassium Hydroxide → 2-(6-chloro-1H-indazol-3-yl)-5H-pyrrolo[3,2-b]pyrazine-7-carboxylic acid

Participants

Reaction Steps

A mixture of methyl 2-(6-chloro-1H-indazol-3-yl)-5-(pivaloyloxymethyl)-5H-pyrrolo[3,2-b]pyrazine-7-carboxylate (202 mg, 0.457 mmol) and KOH (385 mg, 6.86 mmol) in 1,4-dioxane (10 mL) and water (5 mL) was heated to reflux for 3 hours. Reaction mixture was concentrated and the residue was adjusted to pH=5 with 1.0 M HCl aqueous. The precipitate was collected by filtration and dried to afford 2-(6-chloro-1H-indazol-3-yl)-5H-pyrrolo[3,2-b]pyrazine-7-carboxylic acid (178 mg, crude) as a yellow solid. LCMS: (M+H)+=314.

Provenance & Evidence