申请人:Sumitomo Pharmaceuticals Company, Limited
公开号:EP1086948A1
公开(公告)日:2001-03-28
A process for producing a pyridone derivative represented by general formula (4), characterized by reacting a compound represented by general formula (1) with a hypochlorite or hypobromite or with lead tetraacetate to give a compound represented by general formula (2) and reacting this compound with a compound represented by general formula (3). The process is preferable especially from the standpoint of safety. In said formulae, R1 represents hydrogen, alkyl, substituted alkyl, etc.; Y1 represents hydrogen, alkyl, substituted alkyl, etc.; Y2 and Y3 each independently represents hydrogen, halogeno, etc.; and L represents alkyl, substituted alkyl, etc.
一种生产通式(4)所代表的吡啶酮衍生物的工艺,其特征是将通式(1)所代表的化合物与次氯酸盐或次溴酸盐或四乙酸铅反应,得到通式(2)所代表的化合物,再将该化合物与通式(3)所代表的化合物反应。从安全角度考虑,该工艺更可取。在上述通式中,R1 代表氢、烷基、取代烷基等;Y1 代表氢、烷基、取代烷基等;Y2 和 Y3 各自独立地代表氢、卤素等;L 代表烷基、取代烷基等。