Acetic Acid → Methyl 1-{2-[3-(2-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3-thiazol-5-yl)-5-fluoro-2-(methyloxy)phenyl]ethyl}-3-azetidinecarboxylate

Participants

Reaction Steps

To a solution of [3-(2-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3-thiazol-5-yl)-5-fluoro-2-(methyloxy)phenyl]acetaldehyde (D80) (95 mg), acetic acid (0.044 mL) and sodium acetate (113 mg) in ethanol (20.00 mL) stirred under nitrogen at room temperature was added methyl 3-azetidinecarboxylate (106 mg) in one charge. The reaction mixture was stirred at room temperature for 1 h, then the solvent was evaporated in vacuo. The residue was dissolved in dichloromethane (DCM) (20 mL), sodium triacetoxyborohydride (195 mg) was added to the mixture. The reaction mixture was stirred at room temperature overnight. The reaction mixture was partitioned between ethyl acetate (100 mL) and saturated brine (30 mL). The organic phase was dried over sodium sulphate and evaporated in vacuo to give the crude product methyl 1-{2-[3-(2-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3-thiazol-5-yl)-5-fluoro-2-(methyloxy)phenyl]ethyl}-3-azetidinecarboxylate (D82) (100 mg). The crude product was used for next step without further purification. MS (ES): C26H28ClFN2O4S requires 518. found 519.2 (M+H+).

Provenance & Evidence