Sodium Carbonate → HCID 90022085, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture under N2 of (±)-2-bromo-4-(5-chloro-2-ethoxycarbonylmethoxy-phenyl)-6,7-dihydro-4H-thiazolo[5,4-c]pyridine-5-carboxylic acid benzyl ester (63 mg, 0.12 mmol, 1.00 eq.), phenylboronic acid (15 mg, 0.12 mmol, 1.00 eq.) and sodium carbonate (50 mg, 0.47 mmol, 4.00 eq.) in toluene/MeOH/Water 20:4:1 (4 mL), tetrakis(triphenylphosphine) palladium (0) (6.8 mg, 6 μmol, 0.05 eq.) was added and the mixture was stirred at 100° C. for 18 hours. The mixture was allowed to cool to r.t. and concentrated in vacuo. The residue was partitioned between AcOEt (25 mL) and water (25 mL). The layers were separated. The org. phase was washed with sat. aq. NaCl soln. (1×12 mL), dried over MgSO4 and filtered through Celite. The filtrate was concentrated in vacuo. The residue was dissolved in DMF (0.5 mL), 1M aq. NaOH soln. (0.5 mL) was added. The resulting solution was stirred at r.t. for 18 hours. The solution was neutralized with formic acid (1 mL), filtered, and then purified by prep. HPLC (column: Atlantis, 30×75 mm, 10 um, UV/MS, acidic conditions) and concentrated in vacuo to give the desired acid as a white solid.

Provenance & Evidence