4-Methylmorpholine → (3S)-2-[(2R)-3-Cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoyl]-1-methyl-N-[3-(methyloxy)-2-pyrazinyl]-3-pyrazolidinecarboxamide

참여 물질

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반응 단계

4-Methylmorpholine (47.4 μl, 0.431 mmol) was added into a solution of (3S)-2-[(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoyl]-1-{[(phenylmethyl)oxy]carbonyl}-3-pyrazolidinecarboxylic acid (150 mg, 0.359 mmol) and 4-[4,6-bis(methyloxy)-1,3,5-triazin-2-yl]-4-methylmorpholin-4-ium (141 mg, 0.431 mmol) in acetonitrile (5.94 ml). The resulting solution was cooled to 0° C. and stirred at 0° C. for 15 min. To the reaction mixture was added 3-(methyloxy)-2-pyrazinamine (67.4 mg, 0.539 mmol). The reaction mixture was stirred for 2 days at rt. The reaction mixture was concentrated in vacuo and the residue was dissolved in DCM, washed with saturated NaHCO3 solution, followed by brine. The solution was dried over sodium sulfate and filtered. The solvent was removed to give a residue which was redissolved in DMF (3.75 ml) and purified by RP-HPLC to afford (3S)-2-[(2R)-3-cyclopentyl-2-({formyl[(phenylmethyl)oxy]amino}methyl)propanoyl]-1-methyl-N-[3-(methyloxy)-2-pyrazinyl]-3-pyrazolidine carboxamide (96 mg, 0.183 mmol, 51% yield) as a white solid. LC-MS (ES) m/e 525.5 (M+H)+.

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