Dimethylformamide → Dimethyl 2'-fluoro-5'-(methyloxy)-1,1'-biphenyl-2,4-dicarboxylate

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of dimethyl 4-(trifluoromethylsulfonyloxy)isophthalate T9.2 (39.00 g, 114 mmol) in DMF (228 mL, 114 mmol) at 23° C. was added 2-fluoro-5-methoxyphenylboronic acid (29 g, 171 mmol) (commercially available from Aldrich), potassium carbonate (47 g, 342 mmol), followed by tetrakis(triphenylphosphine)palladium (9.2 g, 8.0 mmol). The mixture was heated to 90° C. and stirring was continued for 18 hours. The reaction was cooled to room temperature. Water was added to the reaction, and the resulting mixture was extracted with EtOAc. The organic layer was dried over MgSO4 and concentrated. The residue was purified by silica gel flash chromatography (0-20% EtOAc/hexane) to afford dimethyl 2′-fluoro-5′-(methyloxy)-1,1′-biphenyl-2,4-dicarboxylate T9.3 as a clear oil (32.00 g, 88% yield). MS ESI (pos.) m/e: 319.1 (M+H)+.

Provenance & Evidence