申请人:CELANESE CORPORATION
公开号:EP0178929A1
公开(公告)日:1986-04-23
Carboxylate esters of aromatic diols, e.g., the monoacetate aster of hydroquinone, and carboxylate esters of monoalkyl ethers of aromatic diols, e.g, p-methoxyphenyl acetate, are produced by subjecting an aromatic ketone containing a hydroxy, alkoxy or acyloxy radical on the aromatic ring, e.g.4-hydroxyacetophenone, to a Baeyer-Villiger oxidation using peracetic acid as oxidant under conditions such that the reaction mass contains no more than about 0.1 wt.% of sulfuric acid based on the weight of the initially added pure peracetic acid. The carboxylic esters may be hydrolyzed to the aromatic diols, e.g., hydroquinone, or to the monoalkyl ethers of the aromatic diols, e.g. the monomethyl ether of hydroquinone.
芳香族二元醇的羧酸酯(如对苯二酚的单乙酸酯)和芳香族二元醇的单烷基醚的羧酸酯(如对甲氧基苯基乙酸酯)是通过将芳香环上含有羟基、烷氧基或酰氧基基团的芳香族酮(如 4-羟基苯乙酮,以过氧乙酸为氧化剂进行拜耳-维里格氧化反应,条件是反应物中硫酸的含量不超过最初加入的纯过氧乙酸重量的约 0.1%。羧酸酯可水解成芳香族二元醇,例如对苯二酚,或芳香族二元醇的单烷基醚,例如对苯二酚的单甲醚。