1-Methylimidazole → 2-propen-1-yl (3S)-2-((2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoyl)-3-[(2-pyrimidinylamino)carbonyl]-1-pyrazolidinecarboxylate

Participants

Reaction Conditions

Reaction Steps

1-Methylimidazole (38.1 μl, 0.478 mmol) was added into the solution of 2-((2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoyl)-1-[(2-propen-1-yloxy)carbonyl]-3-pyrazolidinecarboxylic acid (115 mg, 0.239 mmol) in N,N-dimethylformamide (DMF) (1.6 ml). The resulting solution was cooled to 0° C., and then mesyl chloride (19.41 μl, 0.251 mmol) was added dropwise at 0° C. To the reaction mixture was added 2-pyrimidinamine (34.1 mg, 0.358 mmol). After stirring for 3.5 hrs at ambient temperature, the reaction solution was purified by RP-HPLC to yield 2-propen-1-yl (3S)-2-((2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoyl)-3-[(2-pyrimidinylamino)carbonyl]-1-pyrazolidinecarboxylate (32 mg, 0.057 mmol, 24% yield). MS (ES+) m/z 559.0 (MH+).

Provenance & Evidence