Acetic Acid → Ethyl 1-{[3-(2-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3-thiazol-5-yl)-2-ethylphenyl]methyl}-4-piperidinecarboxylate

Participants

Reaction Steps

To a solution of 3-(2-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3-thiazol-5-yl)-2-ethylbenzaldehyde (D74) (120 mg), acetic acid (0.036 mL) and sodium acetate (51.0 mg) in ethanol (20.00 mL) stirred under nitrogen at room temperature was added ethyl 4-piperidinecarboxylate (196 mg) in one charge. The reaction mixture was stirred at room temperature for 30 min, then the solvent was evaporated in vacuo. The residue was dissolved in dichloromethane (DCM) (20 mL), sodium triacetoxyborohydride (165 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 ethyl 1-{[3-(2-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3-thiazol-5-yl)-2-ethylphenyl]methyl}-4-piperidinecarboxylate (D85) (164 mg). The crude product was used for next step without further purification. MS (ES): C29H35ClN2O3S requires 526. found 527.2 (M+H+).

Provenance & Evidence