A pyrimidine derivative of formula (I):-
wherein Y an organic radical and R² is hydrogen, an alkyl group containing from 1 to 4 carbon atoms, an alkenyl group containing from 3 to 4 carbon atoms, or an acylate of an alkyl carboxylic acid containing from 2 to 4 carbon atoms or of an aryl carboxylic acid is useful as an intermediate in the manufacture of pyrimidine plant growth regulators via reaction with a phenyl halide. The compound of formula (I) wherein R² is hydrogen may be prepared by reacting a ketone of general formula (IV):-
with the reaction product of (a) Z - C ≡ C - H wherein Z is hydrogen or a protective group, and (b) an organometallic compound; and (ii) subsequently removing the protective group, Z, where it is present.
公式(I)的
嘧啶衍
生物:其中Y是有机基团,R²是氢,含1至4个碳原子的烷基,含3至4个碳原子的烯基基团,或含有2至4个碳原子的烷基
羧酸或苯基
羧酸的酰化物,在与苯基卤素反应制备
嘧啶植物生长调节剂中用作中间体。当R²为氢时,公式(I)的化合物可通过将通式(IV)的酮与(a)Z-C ≡ C-H(其中Z是氢或保护基团)和(b)有机
金属化合物的反应产物反应,然后在存在Z时去除保护基团Z来制备。