The application provides a modified process for the preparation of an imidazothiazolone of formula (I), or a stereoisomer thereof, or a stereoisomeric mixture thereof, wherein R1 is C1-10 alkyl or aryl, preferably phenyl; R2 is a protective group which is suitable for a nitrogen atom, preferably benzyl, optionally substituted by one or more C1-4 alkyl or C1-4-alkoxy, which comprises the following steps: a) Reacting a compound of formula (II) with a compound of formula (III) in a first solvent; and b) Removing the first solvent and refluxing the reaction mixture in a second solvent to obtain the compound of formula (I).
该应用程序提供了一种改进的制备公式(I)的
咪唑硫唑酮或其立体异构体或其立体异构混合物的过程,其中R1是C1-10烷基或芳基,优选苯基;R2是适用于氮原子的保护基,优选苄基,可选地被一个或多个C1-4烷基或C1-4-烷氧基取代,包括以下步骤:a)在第一溶剂中将公式(II)的化合物与公式(III)的化合物反应;b)去除第一溶剂,并在第二溶剂中回流反应混合物以获得公式(I)的化合物。