| 摘要 |
Compounds of formula alpha where n is 0 or 1 and -Ar- is (a) or (b), by contacting a bromoaniline with either a potassium salt of an aminophenol or resorcinol dissolved in an amine solvent such as pyridine and in the presence of a copper (I) salt such as copper (I) chloride. The preferred bromoaniline is 3-bromoaniline. The preferred potassium salt of aminophenol is the potassium salt of 3-aminophenol. The preferred potassium salt of resorcinol is the potassium salt of para resorcinol. Preferably the potassium salt of aminophenol or resorcinol is formed in situ by reaction of potassium carbonate with aminophenol or resorcinol. Generally, the reaction is carried out at 80 DEG to 160 DEG C. |
