3-(4-(1H-pyrazol-1-yl)benzyl)-6-bromo-2,4-dichloroquinoline → (3-(4-(1H-Pyrazol-1-yl)benzyl)-2,4-dichloro-8-methylquinolin-6-yl)(1-methyl-1H-imidazol-5-yl)methanone

Participants

Reaction Conditions

Reaction Steps

A heterogeneous mixture of 2-(4-(1H-pyrazol-1-yl)benzyl)malonic acid (2.42 g 9.29 mmol, Intermediate 4: step b), (4-amino-3-methylphenyl)(1-methyl-1H-imidazol-5-yl)methanone (2 g, 9.29 mmol, Intermediate 13: step c) and POCl3 (10 mL) was heated at 105° C. for 4 hours. The mixture was cooled to room temperature, concentrated to remove excess POCl3 and ice water was added. The mixture was treated with NH4OH (kept adding ice during addition) to a basic pH 8-9 and the aqueous was then extracted with DCM. The DCM extracts were dried (Na2SO4), evaporated in vacuo and chromatographed (DCM/EtOAc, gradient) to provide the crude product. Pure product was precipitated with MeOH, filtered and dried to provide the title compound as a yellow solid.

Provenance & Evidence