申请人:Halama Ales
公开号:US20050043360A1
公开(公告)日:2005-02-24
A method for obtaining antidiabetic of formula (I), wherein the method comprises condensing of a 4-derivatized phenol or phenolate of general formula (II), wherein R is an amino group-containing organic residue, selected from the group comprising a residue of the following formula —NHR
3
, wherein R
3
is hydrogen or a protecting group, which is removed before further treatment, and a residue of general formula (A), wherein R
b
represents a carboxy group either in the free acid form or in the form of a salt or ester or another functional derivative or the nitrile group CN, and M represents a hydrogen or alkali metal atom, with a pyridine base of general formula (III, wherein Z is a leaving group other than a halogen, wherein, before or after carrying out the condensation, the following operations are carried out: (a) diazotizing the amino group present in organic residue R; (b) converting the diazotised residue R into a derivative of 2-halopropionate or 2-halopropionitrile of formula (B), wherein R
b
is as defined above and X is a halogen; (c) cyclizing the derivative of 2-halopropionate or 2-halopropionitrile with thiourea; (d) hydrolysing the resulting imine thus giving pioglitazone of formula (I).
一种获得式(I)抗糖尿病药物的方法,其中该方法包括将通式(II)的4-取代酚或酚酸盐与通式(III)的吡啶碱缩合,其中R是含有氨基的有机残基,所选残基包括以下公式的残基:—NHR3,其中R3是氢或保护基,在进一步处理之前去除;以及通式(A)的残基,其中Rb表示自由酸形式或盐或酯或其他官能衍生物形式的羧基,或者是腈基CN,M表示氢或碱金属原子,Z表示离去基,不是卤素,缩合前或缩合后进行以下操作:(a)重氮化有机残基R中存在的氨基;(b)将重氮化的残基R转化为2-卤代丙酸酯或2-卤代丙腈的衍生物(B),其中Rb如上定义,X为卤素;(c)与硫脲环化2-卤代丙酸酯或2-卤代丙腈的衍生物;(d)水解得到式(I)的吡格列酮。