The present invention is based on the discovery of a process for preparing pyrimidin- dione compounds, especially alogliptin and its derivatives, which comprises the reaction of a urea derivative of formula (VIII) with a malonic acid or its derivatives to form intermediates of formulae (VII) or (VII-A), which are subsequently converted to a compound of formula (II) upon introduction of a leaving group X. Compound (II) then reacts with an amine to form compound (I), which is optionally converted to its salts of formula (IV).
本发明基于发现了一种制备
嘧啶二
酮化合物的方法,特别是阿格列普汀及其衍
生物,该方法包括将式(VIII)的
脲衍
生物与
丙二酸或其衍
生物反应,形成式(VII)或(VII-A)的
中间体,随后在引入一个离去基团X后转化为式(II)的化合物。化合物(II)然后与胺反应形成化合物(I),可选择将化合物(I)转化为其式(IV)的盐。