2-substituted 5-formylthiazoles are prepared in an advantageous manner by reacting halogenomalonaldehydes in the presence of a solvent and a C1-compound of the formula (III)
in which
X represents oxygen or sulfur and
R1 is as defined in the description,
the reaction mixture comprising less than 5% by weight of water.
通过在溶剂和化合物(III)的存在下,将卤代马来醛与式(III)中X代表氧或
硫,R1如描述中所定义的C1-化合物反应,可以优势地制备2-取代的5-
甲醛噻唑,其中反应混合物中含有的
水重量不到5%。