The present invention relates to a process for the preparation of a key intermediate (as described herein) used in the synthesis of (+)-trans enantiomer of pyrrolidine substituted flavones, represented by the compounds of formula (1) or pharmaceutically acceptable salts thereof; which are inhibitors of cyclin dependant kinases (CDKs) and can be used in the treatment of proliferative disorders such as cancer. Formula (1) wherein R1 has the meaning as indicated in the claims. The process of the present invention has advantages of higher yield and purity, lower reaction temperature, is consistent and involves the use of non toxic solvents. The process of the present invention allows efficient large-scale synthesis and purity of the product obtained is greater than 97 %.
本发明涉及一种用于制备一种关键中间体(如本文所述)的过程,该中间体用于合成
嘧啶取代
黄酮类化合物的(+)-反式对映体,该化合物由式(1)所表示,或其药学上可接受的盐;这些化合物是细胞周期依赖性激酶(CDKs)的
抑制剂,可用于治疗癌症等增殖性疾病。式(1)中R1的含义如索引中所示。本发明的过程具有较高的产率和纯度优势,反应温度较低,一致性好,并且使用无毒溶剂。本发明的过程允许高效的大规模合成,所得产品的纯度大于97%。