Trifluoroacetic acid → 2-(1-azetidin-3-ylmethyl-5-difluoromethoxy-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide

Participants

Reaction Steps

To a stirred solution of tert-butyl 3-((3-(7-(tert-butylcarbamoyl)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl)-5-(difluoromethoxy)-1H-indazol-1-yl)methyl)azetidine-1-carboxylate (80 mg, 114 μmol) in dichloromethane (2 mL) was added trifluoroacetic acid (1 mL). After 15 h the mixture was concentrated in vacuo and the residue dissolved in 25 mL of a Jan. 10, 1960 mixture of ammonium hydroxide/methanol/dichloromethane. After 1 h, the mixture was concentrated in vacuo. Purification by chromatography (silica, 24 g Analogix column, 0-4% methanol containing 10% ammonium hydroxide in dichloromethane) gave 2-(1-azetidin-3-ylmethyl-5-difluoromethoxy-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid tert-butylamide (22 mg, 41%).

Provenance & Evidence