申请人:Otsuka Pharmaceutical Co., Ltd.
公开号:US08940889B2
公开(公告)日:2015-01-27
A process for producing a compound represented by formula (1),
wherein each of R1, R2, R3 and R4, which may be the same or different, represents a hydrogen atom or a lower alkyl group, the process includes deprotecting a protective group (R5) of a compound represented by formula (2),
wherein R1, R2, R3 and R4 are as defined above, and R5 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.
本发明涉及一种制备公式(1)所表示的化合物的方法,其中R1、R2、R3和R4各自独立地表示氢原子或较低的烷基基团,所述方法包括去保护羟基的保护基(R5),所述保护基(R5)位于公式(2)所表示的化合物上,其中R1、R2、R3和R4如上所定义,R5表示羟基的保护基。该方法是一种工业上优越的、简单而高效的方法,用于制备苯并[b][1,4]二氮杂环-2,4-二酮化合物的关键中间体,该化合物是一种治疗心律失常的治疗药物。