申请人:Montedison Fibre S.p.A.
公开号:US04036859A1
公开(公告)日:1977-07-19
A process is disclosed for the preparation of 2-hydroxybenzanthrone and substituted derivatives thereof having the general formula: ##STR1## wherein: R.sub.1 = H, OH R.sub.2, r.sub.3 = h, cl, --OH, --OCH.sub.3, ##STR2## characterized in that an anthraquinone-1-diazonium salt is reacted with an olefinic compound of the formula: ##STR3## wherein X = CN or OCOCH.sub.3, in an alcoholic medium of a lower monovalent alcohol and in the presence of a catalytic quantity of cuprous chloride, at a temperature between 20.degree. and 100.degree. C, and that the reaction intermediate thus obtained is reacted successively with alkali in alcoholic solution.
本发明涉及一种制备2-羟基苯蒽酮及其取代衍生物的方法,其通式为:##STR1## 其中:R.sub.1 = H,OH R.sub.2,r.sub.3 = h,cl,--OH,--OCH.sub.3,##STR2## 其特征在于将蒽醌-1-重氮盐与式为:##STR3## 其中X = CN或OCOCH.sub.3的烯烃化合物在较低一价醇的酒精介质中,并在存在催化量的氯化亚铜的情况下,在20℃至100℃的温度下反应,然后将得到的反应中间体在醇性溶液中依次与碱反应。