申请人:Chung Shan Institute of Science & Technology
公开号:US07232922B2
公开(公告)日:2007-06-19
A method for preparing an arylphosphonite antioxidant of the formula (I) below is disclosed,
wherein Ar is
First, the reactants 2-phenylphenol and phosphorus trichloride are heated under the existence of a zinc chloride catalyst for producing 6-chloro-6H-dibenz[c,e][1,2]oxaphosphorin (CDOP) of the formula (II) below:
Next, the excess phosphorus trichloride is removed. Finally, an organic solution of a di-hydroxylphenol compound of the formula (III),
Ar—(OH)2 (III)
wherein Ar is defined as the above, is heated with the CDOP of formula (II) to form the product of the formula (I).
揭示了一种制备下式(I)的芳基膦酸酯抗氧化剂的方法,其中Ar为首,反应物2-苯基酚和三氯化磷在锌氯化物催化剂存在下加热,生成下式(II)的6-氯-6H-二苯[c,e][1,2]氧磷杂环(CDOP):接着,去除多余的三氯化磷。最后,将下式(III)的二羟基苯酚化合物的有机溶液,其中Ar定义如上,与式(II)的CDOP加热,形成下式(I)的产物。