NOVEL 4BETA-AMINO PODOPHYLLOTOXIN CONGENERS AS POTENTIAL ANTICANCER AGENTS AND A PROCESS FOR THE PREPARATION THEREOF
申请人:Ahmed Kamal
公开号:US20080275248A1
公开(公告)日:2008-11-06
The present invention provides new class of 4β-[4″-(1″,3″-benzothiazole-2″-yl)anilino]podophyllotoxin analogues having the structural formula as follows (4).
Where R═H or CH
3
; R
1
═H, halogen, CH
3
and R
2
═H, halogen, OCH
3
.
The present invention also provides a process for the preparation of new 4β-[4″-(1″, 3″-benzothiazole-2″-yl)anilino]podophyllotoxin analogues as useful anticancer agents. More particularly, it provides a process for the preparation of 4β-[4″-(1″,3″-benzothiazole-2″-yl)anilino] derivatives of podophyllotoxin. The process for the synthesis of new podophyllotoxin analogues as anticancer agents produces the novel and stereo-selective derivatives of the podophyllotoxin in good yields, where in the key step for the synthesis of these analogues is by direct nucleophilic substitution of C-4β-iodo intermediates. The 4β-iodopodophyllotoxin, which has been reacted with substituted or unsubstituted 4-(1,3-benzothiazole-2-yl)aniline in a stereo-selective manner to afford the 4β-[4″-(1″,3″-benzothiazole-2″-yl)anilino] derivatives of podophyllotoxin.
本发明提供了一类新的4β-[4″-(1″,3″-苯并噻唑-2″-基)苯胺基]翠榆毒素类似物,其结构式如下所示(4)。其中R=H或CH3;R1=H、卤素、CH3;R2=H、卤素、OCH3。本发明还提供了一种制备新的4β-[4″-(1″,3″-苯并噻唑-2″-基)苯胺基]翠榆毒素类似物作为有效抗癌剂的方法。更具体地,它提供了一种制备翠榆毒素的4β-[4″-(1″,3″-苯并噻唑-2″-基)苯胺基]衍生物的方法。合成新翠榆毒素类似物作为抗癌剂的方法产生了翠榆毒素的新颖和立体选择性衍生物,其中这些类似物的合成关键步骤是通过对C-4β-碘中间体的直接亲核取代。4β-碘翠榆毒素与取代或未取代的4-(1,3-苯并噻唑-2-基)苯胺以立体选择性的方式反应,从而得到4β-[4″-(1″,3″-苯并噻唑-2″-基)苯胺基]翠榆毒素衍生物。