Diisopropylethylamine → HCID 178472563, compound

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Reaction Steps

5-Chloro-2H-1,2,4-triazole-3-carboxylic acid (60.8 mg, 412 μmol, 1.5 eq.) and HATU (157 mg, 412 μmol, 1.5 eq.) were dissolved in DMF (4.0 mL), and the resulting mixture was stirred for 5 minutes at room temperature to yield the activated acid. DIPEA (95.7 μL) and (2S,4S)-4-amino-5-biphenyl-4-yl-2-hydroxymethyl-pentanoic acid (HCl salt, 100 mg, 275 μmol, 1.0 eq.) were added to the activated acid and the resulting mixture was stirred for 10 minutes. The reaction was quenched with water and the product dried under vacuum. The dried solid was dissolved in AcOH and purified by preparative HPLC. The clean fractions were combined and lyophilized to yield the title compound (88 mg, 95% purity). MS m/z [M+H]+ calc'd for C23H25ClN4O4, 457.16. found 457.4.

Provenance & Evidence