2-Aminophenol → 3-bromo-N-(2-hydroxyphenyl)4-methylbenzamide

Beteiligte Stoffe

Reaktionsschritte

A mixture of 3-bromo-4-methylbenzoic acid (1.0 g, 4.7 mmol) and thionyl chloride (18 mL) was refluxed for 1 h and then cooled to rt. The excess thionyl chloride was removed int vacuo, the residue was dissolved in THF (10 mL), and it was added to a cooled (0° C.) mixture of 2-aminophenol (507 mg, 4.7 mmol) and diisopropylethylamine (0.90 mL; 5.1 mmol) in THF (18 mL). The resulting mixture was stirred at rt for 4 h. The solvent was then removed and the residue was purified by flash chromatography on silica gel eluting with EtOAc:hexanes (1:5 to 1:4) to afford 3-bromo-N-(2-hydroxyphenyl)-4-methylbenzamide.

Herkunft & Nachweise