The present invention relates to an improved process of preparation of idelalisib using a solid form of intermediate of formula (2);
characterized by XRPD pattern having 2θ values 5.5°, 10.9°, 14.3°, 16.9° (±0.2) the process comprising steps
a. Reacting of compound of formula (1);
with a chlorinating agent to obtain a product;
b. Reacting of the product with (S)-2-((tert-butoxycarbonyl)amino)butanoic acid and a base, wherein pH of the reaction mixture is set between 7.5 and 10 to obtain compound of formula (2);
c. Isolating a solid form of compound of formula (2);
d. Transforming the compound of formula (2) into idelalisib.
本发明涉及使用公式(2)的固态中间体的改进制备伊达利西布的过程;其特征在于XRPD图案具有2θ值5.5°、10.9°、14.3°、16.9°(±0.2),该过程包括以下步骤:a. 用
氯化剂反应公式(1)的化合物以获得产物;b. 将产物与(S)-2-((叔丁氧羰基)
氨基)
丁酸和碱反应,其中反应混合物的pH值设置在7.5至10之间以获得公式(2)的化合物;c. 分离公式(2)的固态化合物;d. 将公式(2)的化合物转化为伊达利西布。