Diisopropylethylamine → 2-((2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoyl)-1-[(2-propen-1-yloxy)carbonyl]-3-pyrazolidinecarboxylic acid

Participants

Reaction Steps

(2R)-3-Cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoyl fluoride (784 mg, 2.6 mmol) was added into the solution of 1-[(2-propen-1-yloxy)carbonyl]-3-pyrazolidine carboxylic acid (677 mg, 3.38 mmol) and Hunig's base (1811 μl, 10.40 mmol) in N,N-dimethylformamide (DMF) (11.1 ml). The reaction was stirred for 5 hrs at ambient temperature. The reaction was purified by RP-HPLC to give 2-((2R)-3-cyclopentyl-2-{[formyl(tetrahydro-2H-pyran-2-yloxy)amino]methyl}propanoyl)-1-[(2-propen-1-yloxy)carbonyl]-3-pyrazolidinecarboxylic acid (428 mg, 0.889 mmol, 34% yield). MS (ES+) m/z 482.0 (MH+).

Provenance & Evidence