[EN] PROCESS FOR THE PREPARATION OF PURINE DERIVATIVES EXHIBITING CDK INHIBITORY ACTIVITY<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS DE PURINE PRÉSENTANT UNE ACTIVITÉ INHIBITRICE DE CDK
申请人:CYCLACEL LTD
公开号:WO2021148793A1
公开(公告)日:2021-07-29
The present invention relates to a process for preparing a compound of formula [I], or a pharmaceutically acceptable salt thereof, said process comprising the steps of: (i) forming a reaction mixture comprising a compound of formula [II] and a compound of formula [III]; (ii) heating said reaction mixture to a temperature of at least about 130°C to form a compound of formula [I]; (iii) isolating said compound of formula [I] from the mixture and optionally recovering unreacted compound of formula [III]; and (iv) optionally converting said compound of formula [I] into salt form; wherein: R1 and R2 are each independently H, alkyl or haloalkyl; R3 and R4 are each independently H, alkyl, haloalkyl or aryl; R5 is alkyl, alkenyl, cycloalkyl or cycloalkyl-alkyl, each of which may be optionally substituted with one or more OH groups; R6 is selected from cyclopropylamino, cyclopropylmethylamino, cyclobutylamino, cyclobutylmethylamino and where one of X, Y and Z is N and the remainder are CR9; R7, R8 and each R9 are independently H, alkyl or haloalkyl, wherein at least one of R7, R8 and R9 is other than H. Further aspects of the invention relate to a process for preparing intermediates of formula [II], and other intermediates useful in the synthesis of compounds of formula [I].
本发明涉及一种制备化合物[I]或其药用可接受盐的方法,该方法包括以下步骤:(i)形成包含化合物[II]和化合物[III]的反应混合物;(ii)加热所述反应混合物至至少约130°C的温度以形成化合物[I];(iii)从混合物中分离所述化合物[I]并可选择性地回收未反应的化合物[III];以及(iv)可选择性地将所述化合物[I]转化为盐形式;其中:R1和R2分别独立地为H、烷基或卤代烷基;R3和R4分别独立地为H、烷基、卤代烷基或芳基;R5为烷基、烯基、环烷基或环烷基-烷基,其中每个可能可选择地被一个或多个羟基取代;R6从环丙基氨基、环丙基甲基氨基、环丁基氨基、环丁基甲基氨基中选择,其中X、Y和Z中的一个是N,其余为CR9;R7、R8和每个R9独立地为H、烷基或卤代烷基,其中至少一个R7、R8或R9不是H。该发明的进一步方面涉及一种制备中间体[II]和其他在合成化合物[I]过程中有用的中间体的方法。