tert-Butyl 5-(4-aminophenyl)-3-oxo-2,3-dihydro-1H-pyrazole-1-carboxylate → tert-Butyl 5-[4-({2-[4-(5-chloro-2-cyanophenyl)-5-methoxy-2-oxopyridin-1(2H)-yl]butanoyl}amino)phenyl]-3-oxo-2,3-dihydro-1H-pyrazole-1-carboxylate

Participants

Reaction Steps

87 mg (0.25 mmol) of 2-[4-(5-chloro-2-cyanophenyl)-5-methoxy-2-oxopyridin-1(2H)-yl]butanoic acid (racemate) and 84 mg (purity 90%, 0.28 mmol, 1.1 eq.) of tert-butyl 5-(4-aminophenyl)-3-oxo-2,3-dihydro-1H-pyrazole-1-carboxylate were reacted according to General Method 5A. The crude product was purified by preparative HPLC (Reprosil C18, water/acetonitrile gradient). Yield: 17 mg (purity 70%, 8% of theory)

Provenance & Evidence