1,8-Diazabicyclo(5.4.0)undec-7-ene → HCID 66875979, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred suspension of phenyl 3-tert-butyl-1-phenyl-1H-pyrazol-5-ylcarbamate (prepared as described in example 153A) (335 mg, 1 mmol) and 3-amino-4-fluorophenol (127 mg, 1 mmol) in acetonitrile (15 mL) at rt, was added DBU (0.3 mL, 2 mmol). The mixture was heated at 50° C. for 1 h. The reaction mixture was cooled to rt, concentrated under reduced pressure, and the residue purified via silica gel column chromatography to afford 1-(3-tert-butyl-1-phenyl-1H-pyrazol-5-yl)-3-(2-fluoro-5-hydroxyphenyl)urea (217 mg, 59%) as a solid. LC-MS (ESI) m/z 369 (M+H)+.

Provenance & Evidence