申请人:SUMITOMO PHARMACEUTICALS COMPANY, LIMITED
公开号:US20010051732A1
公开(公告)日:2001-12-13
A process for preparing a pyridone derivative (
4
), which comprises reacting the compound (
1
) with a hypochlorite or a hypobromite or with lead tetraacetate to give the compound (
2
), and reacting the compound (
2
) with the compound (
3
). Said process is preferably especially from the standpoint of safety.
1
wherein R
1
is hydrogen, alkyl, substituted alkyl, etc.; Y
1
is hydrogen, alky, substituted alky, etc.; Y
2
and Y
3
are indenpently hydrogen, halogen, etc.; and L is alkyl, substituted alkyl, etc.
一种制备吡啶酮衍生物(4)的方法,包括将化合物(1)与次氯酸盐或次溴酸盐或四乙酸铅反应以得到化合物(2),并将化合物(2)与化合物(3)反应。从安全角度考虑,该方法是首选的。其中R1为氢、烷基、取代烷基等;Y1为氢、烷基、取代烷基等;Y2和Y3独立地为氢、卤素等;L为烷基、取代烷基等。