Formic Acid → 3-(1-(4-amino-3-(3-fluoro-5-hydroxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-4-(1-(azetidine-3-carbonyl)-1,2,3,6-tetrahydropyridin-4-yl)-1H-isochromen-1-one formate

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Reaction Steps

4 M HCl in 1,4-dioxane (2 ml, 8.00 mmol) was added to a stirred solution of tert-butyl 3-(4-(3-(1-(4-amino-3-(3-fluoro-5-hydroxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-1-oxo-1H-isochromen-4-yl)-1,2,3,6-tetrahydropyridine-1-carbonyl)azetidine-1-carboxylate (0.153 g, 0.224 mmol) in 1,4-dioxane (1 ml). After 1 h stirring at rt volatiles were removed under reduced pressure. Purification by RP flash chromatography (Biotage Isolera, 30 g C18 column, gradient elution from 100:0 to 80:20 A/B in 15 CV; A: water/MeCN 95/5+0.01% HCOOH, B: water/MeCN 5/95+0.01% HCOOH) yielded title compound (92.2 mg, 0.147 mmol, 65.5% yield) as a white powder.

Provenance & Evidence