[EN] PROCESS FOR PREPARING PURINE DERIVATIVES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS DE PURINE
申请人:CYCLACEL LTD
公开号:WO2018138500A1
公开(公告)日:2018-08-02
The present invention relates to a process for preparing a compound of formula [I], said process comprising the steps of: formula [II]+formula [III]−>formula [I] (i) forming a reaction mixture comprising (a) a compound of formula [II], (b) a compound of formula [III] and (c) 1,2-propanediol or polyethylene glycol, or a mixture thereof, and optionally (d) a base; (ii) heating said reaction mixture to a temperature of at least about 150°C to form a compound of formula [I]; (iii) isolating said compound of formula [I]; 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 formula (A) 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 highly diastereoselective process for the preparation of compounds of formula [III], a process for preparing intermediates of formula [II], and other intermediates useful in the synthesis of compounds of formula [I], and to a process for preparing the crystalline tartrate salt and free base of compounds of formula [I].
本发明涉及一种制备式[I]化合物的过程,该过程包括以下步骤:式[II]+式[III]−>式[I](i)形成反应混合物,包括(a)式[II]化合物,(b)式[III]化合物和(c)1,2-丙二醇或聚乙二醇,或其混合物,以及可选的(d)碱;(ii)将反应混合物加热至至少约150°C的温度以形成式[I]化合物;(iii)分离所述式[I]化合物;(iv)可选地将所述式[I]化合物转化为盐形式;其中:R1和R2各自独立地为H,烷基或卤代烷基;R3和R4各自独立地为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,每个基团可以选择性地被一个或多个OH基团取代;R6选自环丙基氨基,环丙基甲基氨基,环丁基氨基,环丁基甲基氨基和式(A),其中X,Y和Z中的一个为N,其余为CR9;R7,R8和每个R9各自独立地为H,烷基或卤代烷基,其中至少一个R7,R8和R9不为H。本发明的其他方面涉及一种高度对映选择性的制备式[III]化合物的过程,一种制备式[II]中间体的过程,以及在合成式[I]化合物中有用的其他中间体,以及一种制备式[I]的结晶酒石酸盐和自由碱的过程。