申请人:OTSUKA PHARMACEUTICAL CO., LTD.
公开号:US20140194621A1
公开(公告)日:2014-07-10
A process for producing a compound represented by formula (1),
wherein each of R
1
, R
2
, R
3
and R
4
, which may be the same or different, represents a hydrogen atom or a lower alkyl group, the process includes deprotecting a protective group (R
5
) of a compound represented by formula (2),
wherein R
1
, R
2
, R
3
and R
4
are as defined above, and R
5
represents a protective group of a hydroxy group. The process is an industrially advantageous, simple, and efficient process for producing a key intermediate of a benzo[b][1,4]diazepine-2,4-dione compound, which is a therapeutic medicine for arrhythmia.
一种生产式(1)所代表的化合物的方法,其中R1、R2、R3和R4,可以相同也可以不同,分别代表氢原子或较低的烷基基团,该方法包括去保护羟基保护基(R5)的步骤,所述保护基化合物的式子为(2),其中R1、R2、R3和R4如上所定义,而R5代表羟基的保护基。该方法是一种工业上有利、简单、高效的方法,用于生产苯并[b][1,4]二氮杂环-2,4-二酮化合物的关键中间体,该化合物是治疗心律不齐的治疗药物。