申请人:Laboratoire Medidom S.A.
公开号:US05986129A1
公开(公告)日:1999-11-16
The following description sets forth a process for producing rhein, diacerhein and other diacyl derivatives thereof, which comprises the following steps: treatment of a diphenylketone ##STR1## in which R.sub.1 is --OR', --NR'R", --SR', where R' and R" are H, an alkyl or aromatic group; R.sub.2 is H or a protective group, R.sub.3 is --OH or C.sub.1 -C.sub.4 alkyl, with an acid or superacid to give a 1-aminoanthraquinone derivative, diazotisation, replacement of the --NH.sub.2 group by --OH, optional removal of the protective group, and acylation.
以下描述了一种生产大黄素、二羟基大黄素和其他二酰基衍生物的过程,包括以下步骤:用酸或超酸处理二苯基酮##STR1## 其中R.sub.1是--OR',--NR'R",--SR',其中R'和R"是H,烷基或芳基;R.sub.2是H或保护基,R.sub.3是--OH或C.sub.1-C.sub.4烷基,得到1-氨基蒽醌衍生物,重氮化,将--NH.sub.2基替换为--OH,可选地去除保护基,然后酰化。