Diisopropylethylamine → 2-{6-Butyl-2-[4-(4-trifluoromethoxyphenyl) imidazol-1-yl] pyrimidin-4-ylamino}-4-methyl-pentanoic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

L-Leucine tert-butyl ester hydrochloride (291 mg) was dissolved in DMSO (5 mL) under an argon atmosphere and treated with diisopropylethylamine (450 μL, 2.6 mmol, 4 eq.) followed by 4-Butyl-6-chloro-2-[4-(4-trifluoromethoxy-phenyl)-imidazol-1-yl]-pyrimidine (274 mg). The mixture was heated to 80° C. for 48 h. DMSO and the volatiles were removed in vacuo to give a crude residue from which 2-{6-butyl-2-[4-(4-trifluoromethoxyphenyl) imidazol-1-yl] pyrimidin-4-ylamino}-4-methyl-pentanoic acid tert-butyl ester (321 mg) was isolated by flash chromatography (n-hexanes/ethyl acetate 4/1).

Provenance & Evidence