Benzyl Alcohol → HCID 89444402, compound

Participants

Reaction Steps

To a solution of phenylmethanol (3 mL) was added dropwise thionyl chloride (3 equiv., 2.29 mmol, 0.169 mL). After 5 min, 4-oxo-4-[[5-(trifluoromethyl)-2-pyridyl]amino]butanoic acid A19 (prepared as described before, 201 mg, 0.766 mmol) was added to the solution. The reaction mixture was stirred overnight at room temperature. The reaction was stopped and the solution was partitioned between ethyl acetate and a saturated solution of sodium hydrogenocarbonate. The aqueous layer was separated and extracted with ethyl acetate (2×). The combined organic layer was washed with water (×2) and brine, dried on magnesium sulfate and concentrated under vacuum. To remove the benzyl alcohol, water was added until the ester precipitated. The ester was filtrated and then washed with water and cyclohexane (20 mL). The residue was first dissolved in ethyl acetate then precipitated with cyclohexane and the solid obtained was filtered to give benzyl 4-oxo-4-[[5-(trifluoromethyl)-2-pyridyl]amino]butanoate A34 (32%). 1H NMR (400 MHz, CDCl3) 8.7 (s, 1H), 8.31 (m, 1H), 8.22 (bs, 1H), 7.90 (m, 1H), 7.35 (m, 5H), 5.15 (s, 2H), 2.78 (m, 4H) ppm. Compound A51, A52, A53, A54, A73, A74, A78, A79, A80 and A81 from table A were prepared by the same method using the corresponding alcohol.

Provenance & Evidence