Ethyl Acetate → 2-Acetylsulfanylmethyl-3-(6-tert-butoxycarbonylamino-pyridin-3-yl)-butyric acid ethyl ester

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Reaction Conditions

Reaction Steps

TEA (0.076 mL, 0.542 mmol) was added to a solution of 2-[1-(6-tert-butoxycarbonylamino-pyridin-3-yl)-ethyl]-acrylic acid ethyl ester (158 mg, 0.493 mmol) in thioacetic acid (2 mL) at 0° C. under argon. The mixture was stirred at 45° C. over night. EtOAc was added and the solution was washed with NaHCO3 and brine, dried and concentrated under reduced pressure. Flash chromatography (toluene/EtOAc, 5:1→1:1) gave slightly unpure 2-acetylsulfanylmethyl-3-(6-tert-butoxycarbonylamino-pyridin-3-yl)-butyric acid ethyl ester (178 mg, 91%).

Provenance & Evidence