| 摘要 |
PURPOSE:To produce a carboxybiphenyl compound in a high yield by oxidizing the corresponding acylated biphenyl compound under a profitable condition. CONSTITUTION:An acylated biphenyl compound is oxidized with molecular oxygen (air) in the presence of a prescribed oxidation catalyst and a specific aldehyde, etc., to produce the corresponding carboxybiphenyl compound. The oxidation catalyst contains a heavy metal selected from cobalt, manganese and cerium, and a brominated compound. The aldehyde. etc., are selected from paraldehyde, methyl ethyl ketone and 2-4C saturated aldehydes. A method in which the acylated biphenyl compound is oxidized while the aldehyde is continuously or intermittently fed at a rate of 0.1-100 pts.wt./h per 100 pts.wt. of the acylated biphenyl compound is profitable. |
