Potassium Carbonate → 1,1-Dimethylethyl 4-{[3-({[(6-fluoro-3'-formyl-3-biphenylyl)methyl]amino}carbonyl)phenyl]methyl}-1-piperidinecarboxylate

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Reaction Steps

To a solution of 3-formylphenyl)boronic acid (21 mg, 0.14 mmol) in dioxane (3 mL) and water (1 mL) was added 1,1-dimethylethyl 4-{[3-({[(3-bromo-4-fluorophenyl)methyl]amino}carbonyl)phenyl]methyl)-1-piperidinecarboxylate (70 mg, 0.14 mmol), K2CO3 (97 mg, 0.7 mmol) and Pd(PPh3)4 (8 mg, 0.007 mmol). The resulting solution was irradiated in a microwave reactor at 150° C. for 20 minutes then diluted with EtOAc (5 mL). The organic layer was separated and the aqueous layer was further extracted by EtOAc (2×5 mL). The organic layers were combined, dried over Na2SO4, filtered and concentrated under vacuum. The residue was purified by Gilson HPLC, eluting with acetonitrile/water/0.1% TFA (10/90 to 90/10, v/v, over 12 min), to give the title compound (60 mg, 81%). LC/MS: m/z, 531 (M+H), 2.83 min.

Provenance & Evidence