Process for Producing Thiazolidinedione Compound and Production Intermediate Thereof
申请人:Nakamura Yoshitaka
公开号:US20080103185A1
公开(公告)日:2008-05-01
There are provided crystals of a thiazolidinedione derivative having excellent prophylactic and therapeutic effects on a disease caused by insulin resistance and a process for producing the thiazolidinedione derivative with a high purity.
As described above, a process for producing a compound represented by the general formula (A) or a salt thereof, comprising converting 4-[(2,4-dioxothiazolidin-5-yl)methyl]phenoxyacetic acid represented by the following formula into a compound of the general formula (I), wherein X=a halogen atom; then reacting the compound with a compound represented by the general formula (II), wherein R
1
, R
2
, R
3
and R
4
=a hydrogen atom, a hydroxyl group, C1-C6 alkyl, C1-C6 alkoxy, benzyloxy, acetoxy, trifluoromethyl or a halogen atom, R
5
=C1-C6 alkyl, and R
6
=a protecting group for an amino group, to produce a compound represented by the general formula (III); and subsequently cyclizing the compound into the final product, and crystals of a compound represented by the general formula (A) or a salt thereof.
提供了一种噻唑烷二酮衍生物的晶体,具有对因胰岛素抵抗引起的疾病具有卓越的预防和治疗效果,并提供了一种高纯度制备噻唑烷二酮衍生物的方法。如上所述,提供了一种制备通式(A)化合物或其盐的方法,包括将以下式子所示的4-[(2,4-二氧噻唑烷-5-基)甲基]苯氧乙酸转化为通式(I)化合物,其中X为卤素原子; 然后将该化合物与通式(II)化合物反应,其中R1、R2、R3和R4为氢原子、羟基、C1-C6烷基、C1-C6烷氧基、苄氧基、乙酰氧基、三氟甲基或卤素原子,R5为C1-C6烷基,R6为氨基保护基,以制备通式(III)化合物; 然后将该化合物环化为最终产物,并提供了通式(A)化合物或其盐的晶体。