A crystalline form of a cyclin dependent protein kinase (CDK4&) 6 inhibitor and a process for its preparation are provided. Specifically, 6 acetyl 8 cyclopentyl 5 methyl (2 (5 (4 piperidine base) pyridine 2 amino pyridine base)) and [2,3 d] pyrimidine 7 (8H) ketone (type (I) type II crystal and its compounds) the preparation method, the crystallization has such as X ray powder diffraction pattern shown in Figure 1, it has good chemical stability and crystal stability, crystallization solvent and the use of low toxicity and low residue, can be better used in clinical treatment.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请,说明书已公开。
【技术保护点】
PCT国内申请,权利要求书已公开。
【技术特征摘要】
【国外来华专利技术】2015.04....
【专利技术属性】
技术研发人员:武乖利,高晓晖,张全良,卢韵,吴玉霞,
申请(专利权)人:江苏恒瑞医药股份有限公司,
类型:发明
国别省市:江苏,32
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