Trifluoroacetic acid → 5-cyclopropyl-N-[3-hydroxy-3-methyl-1-(methylamino)-1-oxobutan-2-yl]-4-[(2S)-1,1,1-trifluoropropan-2-yl]oxypyridine-2-carboxamide

関与物質

反応手順

To a solution of tert-butyl N-[2-hydroxy-2-methyl-1-(methylcarbamoyl)propyl]carbamate (example 236a, 760 mg, 1.94 mmol) in dichloromethane (3 ml) was added trifluoroacetic acid (3.00 ml). The reaction mixture was stirred at room temperature overnight. The reaction mixture was evaporated down to dryness and the crude residue was dissolved in toluene. Volatiles were removed in vacuo to afford a white solid which was dried in HV overnight to yield the crude amine (680 mg) as a trifluroacetate salt which was used without any purification. The crude amine salt was used to synthesize the title compound in analogy to Example 112e, using 5-Cyclopropyl-4-((S)-2,2,2-trifluoro-1-methyl-ethoxy)-pyridine-2-carboxylic acid (Example 68a) as starting materials and the title compound was isolated (76 mg, 59%); MS (ESI, m/z): 404.6 (M+H+).

情報源と証拠