| 摘要 |
1,130,283. 2 - Acetoacetylamino acridone. FARBWERKE HOECHST A.G. 5 April, 1967 [6 April, 1966], No. 15565/67. Heading C2C. [Also in Division C4] 2-Acetoacetylamino acridone is prepared by (a) reacting 2-amino acridone with diketene in methanol, ethanol or isopropanol or in a mixture thereof with water at 10-80‹ C. at pH 3 to 7, or (b) reacting 2-amino acridone with acetoacetic acid methyl or ethyl esters in chlorobenzene, toluene or xylene in presence of a base, e.g. pyridine or diethylaniline at 60- 120‹ C. |
