Hydrochloric Acid → (2S)-8-[2-amino-6-[(1R)-1-[4-bromo-2-(3-methylpyrazol-1-yl)phenyl]-2,2,2-trifluoro-ethoxy]pyrimidin-4-yl]-3-benzyloxycarbonyl-3,8-diazaspiro[4.5]decane-2-carboxylic acid

Participants

Reaction Steps

To a solution of (S)-2-benzyl 3-ethyl 8-(2-amino-6-((R)-1-(4-bromo-2-(3-methyl-1H-pyrazol-1-yl)phenyl)-2,2,2-trifluoroethoxy)pyrimidin-4-yl)-2,8-diazaspiro[4.5]decane-2,3-dicarboxylate (1.50 g, 1.94 mmol, See Ex. 1u) in THF (20 mL), MeOH (10 mL) and water (10 mL) was added LiOH—H2O (0.80 g, 19.4 mmol), and the reaction was stirred at RT for 4 h. The pH of the reaction mixture was adjusted to 6.5 with 6 N HCl, and the organic solvents were removed in vacuo to provide a white solid that is filtered away. The reaction mixture was then partitioned between water and EtOAc, and extracted. The combined organic layers were washed with brine, dried over Na2SO4, filtered, then concentrated in vacuo to provide (2S)-8-[2-amino-6-[(1R)-1-[4-bromo-2-(3-methylpyrazol-1-yl)phenyl]-2,2,2-trifluoro-ethoxy]pyrimidin-4-yl]-3-benzyloxycarbonyl-3,8-diazaspiro[4.5]decane-2-carboxylic acid as a white solid that is used directly without further purification.

Provenance & Evidence