申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:US20220106273A1
公开(公告)日:2022-04-07
The present invention provides an effective production method for a pyridone compound. More specifically, the present invention provides a production method comprising: a step of reacting the compound represented by formula (1) (in the formula, X
1
and X
2
each independently represent a halogen atom, R
1
represents a hydrogen atom, an amino group, or a group represented by NHCOR
2
, and R
2
represents a C1-C5 alkyl group) with 4 to 10 times by mass, with respect to the compound represented by formula (1), of the compound represented by formula (2) (in the formula, R
2
represents the same as described previously), in the presence of at least one of a tri(C1-C8 alkyl)amine and an alkali metal acetate, at a temperature of 100° C. or higher to obtain the compound represented by formula (3) (in the formula, X
1
, X
2
and R
2
represent the same as described previously, R
6
represents a hydrogen atom or an NHCOR
2
group); and a step of hydrolyzing the compound represented by formula (3), to obtain the pyridone compound represented by formula (4) (in the formula, X
1
, X
2
and R
1
represent the same as described previously).
本发明提供了一种有效的吡啶酮化合物的生产方法。更具体地说,本发明提供了一种生产方法,包括以下步骤:在至少一种三(C1-C8烷基)胺和一种碱金属醋酸盐的存在下,将式(1)所表示的化合物(其中,X1和X2分别独立地表示卤素原子,R1表示氢原子、氨基团或由NHCOR2表示的基团,R2表示C1-C5烷基)与式(2)所表示的化合物(其中,R2表示如前所述)按照化合物(1)的4至10倍的质量,在温度为100℃或更高的条件下反应,以获得式(3)所表示的化合物(其中,X1、X2和R2表示如前所述,R6表示氢原子或NHCOR2基团);以及水解式(3)所表示的化合物,以获得式(4)所表示的吡啶酮化合物(其中,X1、X2和R1表示如前所述)。