Dimethyl Sulfoxide → HCID 59733153, compound

Participants

Reaction Steps

To 1-(2-cyclopentanecarbonyl-4-methyl-phenyl)-3-[4-hydroxymethyl-thiazol-2-yl]-urea (1.8 g, 5 mmol) in CH2Cl2 (40 mL) at 0° C. was added Et3N (2.88 mL, 20 mmol), dimethyl sulfoxide (10 mL) followed by sulfur trioxide-pyridine (2.38 g, 15.0 mmol). The reaction mixture was stirred for 1 h and then poured into water (30 mL). The mixture was extracted with CH2Cl2 and the organic layers was washed with 1.0 N ammonium chloride (2×20 mL), water (2×20 mL), brine (1×20 mL), dried (Na2SO4) and concentrated to give a solid. The solid was purified by column chromatography (silica, Hexanes/EtOAc, 20–50%) to obtain 1-(2-cyclopentanecarbonyl-4-methyl-phenyl)-3-(4-formyl-thiazol-2-yl)-urea (1.59 g, 86%) as a white solid.

Provenance & Evidence