发明名称 |
PREPARATION OF GAMMA-KETOCARBOXYLIC ACID |
摘要 |
PURPOSE:To prepare the titled compound useful as an intermediate of pharmaceuticals, by reacting an aniline derivative with an acid anhydride in the presence of aluminum chloride in a mixed solvent composed of a specific amide and tetrachloroethane. CONSTITUTION:The gamma-ketocarboxylic acid of formula III can be prepared by reacting an aniline derivative of formula I (R<1> is 1-4C alkyl) with an acid anhydride of formula II (R<2> and R<3> are H, methyl or ethyl; dotted line is single or double C-C bond) in the presence of aluminum chloride in a mixture of (A) an amine selected from dimethylformamide, dimethylacetamide and N-methylpyrrolidone and (B) tetrachloroethane. The molar ratio of the aniline derivative to the acid anhydride is preferably 2.0-0.5, and the amount of aluminum chloride is 5-15mol per 1mol of the lesser component in the aniline derivative and the acid anhydride. The reaction temperature is preferably 20-60 deg.C.
|
申请公布号 |
JPS59186946(A) |
申请公布日期 |
1984.10.23 |
申请号 |
JP19830061332 |
申请日期 |
1983.04.07 |
申请人 |
MITSUBISHI KASEI KOGYO KK |
发明人 |
OKUJIMA HIROMI;FURUYA RIKIZOU |
分类号 |
C07C231/00;C07C231/12;C07C233/54 |
主分类号 |
C07C231/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|