Potassium Carbonate → 3-{[3-Chloro-2-(2-trifluoromethyl-biphenyl-4-yl)-benzo[b]thiophen-5-ylmethyl]-amino}-propionic acid tert-butyl ester

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution of 5-bromomethyl-3-chloro-2-(2-trifluoromethyl-biphenyl-4-yl)-benzo[b]thiophene (50 mg, 0.104 mmol) in DMF (1 mL) are added β-alanine tert-butyl ester hydrochloride (19 mg, 1 eq.) and K2CO3 (68 mg, 5 eq.). The mixture is stirred at 50° C. overnight. The mixture is diluted with EtOAc (40 mL), washed with 10% aqueous Na2S2O3, brine, dried over MgSO4, filtered, and concentrated. The mixture is purified by column chromatography (EtOAc/Hexane, gradient) to give 43 mg of 3-{[3-chloro-2-(2-trifluoromethyl-biphenyl-4-yl)-benzo[b]thiophen-5-ylmethyl]-amino}-propionic acid tert-butyl ester in 76% yield.

Herkunft & Nachweise