[EN] METHOD OF PRODUCING AMINOPHENOL COMPOUNDS<br/>[FR] PROCEDE DE FABRICATION DE COMPOSES AMINOPHENOLS
申请人:OTSUKA PHARMA CO LTD
公开号:WO2005092832A1
公开(公告)日:2005-10-06
The present invention provides an industrially advantageous method of producing aminophenol compounds represented by the formula (1) by a simple and easy procedure at a high yield and a high purity. The present invention provides a method of producing an aminophenol compound represented by the formula (1): (wherein each of R1 and R2, which may be the same or different, is a hydrogen atom, a substituted or unsubstituted lower alkyl group or the like; R1 and R2, taken together with the adjacent nitrogen atom, may form a 5- or 6-membered heterocycle with or without other intervening heteroatoms; the heterocycle may be substituted by 1 to 3 substituents selected from the group consisting of a hydroxyl group, a substituted or unsubstituted lower alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryloxy group and the like; and the hydroxyl group in the formula (1) is substituted on the 2- or 4-position to the amino group on the phenyl ring), which comprises allowing a cyclohexanedione compound represented by the formula (2) to react with an amine compound represented by the formula (3) (wherein R1 and R2 are as defined above), under a neutral or basic condition.
本发明提供一种在高产率和高纯度下通过简单易行的程序生产由式(1)表示的氨基酚化合物的工业上有利的方法。本发明提供了一种生产由式(1)表示的氨基酚化合物的方法:(其中R1和R2中的每一个,可能相同也可能不同,是氢原子,取代或未取代的较低烷基基团或类似物;R1和R2与相邻氮原子一起可以形成5或6成员的杂环,有或无其他插入的杂原子;该杂环可以被1至3个取代基取代,所述取代基选自羟基团、取代或未取代的较低烷基基团、取代或未取代的芳基基团、取代或未取代的芳氧基团等;并且在式(1)中的羟基团被取代在苯环上的氨基团的2-或4-位置),其包括使由式(2)表示的环己二酮化合物与由式(3)表示的胺化合物(其中R1和R2如上定义)在中性或碱性条件下反应。