[EN] PROCESS FOR THE PREPARATION OF 5-[[4-[2-(5-ETHYL-2-PYRIDINYL)ETHOXY]PHENYL] METHYL]-2,4-THIAZOLIDINEDIONE<br/>[FR] PROCEDE SERVANT A PREPARER 5-[[4-[2-(5-ETHYL-2-PYRIDINYL)ETHOXY]PHENYL]METHYL]-2,4-THIAZOLIDINEDIONE
申请人:SUN PHARMACEUTICAL IND LTD
公开号:WO2004108721A1
公开(公告)日:2004-12-16
A process for the preparation of 5-[[4-[2-(5-ethyl-2-pyridinyl)ethoxy]phenyl]methyl]-2,4-thiazolidinedione (formula 1) comprising a. reacting diazonium salt of 4-[2-(5-Ethyl-2-pyridyl) ethoxy] amino- benzene, compound of formula 2, with acrylamide, aqueous HX (wherein X is Br or Cl), under meerwein arylation conditions to yield compound of formula 3; b. condensing compound of formula 3 with thiourea to obtain compound of formula 4; and c. converting compound of formula 4 to compound of formula 1.
一种制备5-[[4-[2-(5-乙基-2-吡啶基)乙氧基]苯基]甲基]-2,4-噻唑二酮(式1)的方法,包括a.将4-[2-(5-乙基-2-吡啶基)乙氧基]氨基苯的重氮盐(式2化合物)与丙烯酰胺、水溶HX(其中X为Br或Cl)在Meerwein芳基化条件下反应,得到式3化合物;b.将式3化合物与硫脲缩合得到式4化合物;c.将式4化合物转化为式1化合物。