Acetic Acid → 1-(4'-{5-[3-(4-Chloro-phenyl)-1-methyl-propylamino]-1-methyl-1H-pyrazol-4-yl}-biphenyl-4-yl)-cyclopropanecarboxylic acid ethyl ester

Participants

Reaction Conditions

Reaction Steps

1-[4′-(5-Amino-1-methyl-1H-pyrazol-4-yl)-biphenyl-4-yl]-cyclopropanecarboxylic acid ethyl ester (0.125 g, 0.346 mmol) and 4-(4-chloro-phenyl)-butan-2-one (0.095 g, 0.52 mmol) were dissolved in MeOH (5 mL). Acetic acid (0.030 mL, 0.52 mmol) was added along with a few molecular sieves and the reaction stirred at 30° C. overnight. Sodium cyanoborohydride (0.033 g, 0.52 mmol) was then added and the reaction was heated to 60° C. for 4 hours. An additional 0.5 equivalents of sodium cyanoborohydride was added and the reaction continued heating for 1 hour. All solvent was removed and the residue was submitted to EtOAc/H2O workup. The residue was purified twice on silica gel (0-100% EtOAc in hexanes followed by 0-10% MeOH in CH2Cl2) to afford the title compound.

Provenance & Evidence