inexpensive, nontoxic manganese catalyst enabled unprecedented redox‐neutral carbonylative annulations under ambient pressure. The manganese catalyst outperformed all other typically used base and precious‐metal catalysts. The outstanding versatility of the manganese catalysis manifold was reflected by ample substrate scope, setting the stage for effective late‐stage manipulations under racemization‐free
cross-coupling reactions of halo derivatives of 4H-pyrido[1,2-a]pyrimidin-4-one with (het)arylboronic acids allow easy access to (het)aryl and vinyl derivatives of this bicycle in good to excellent yields, even from chloro derivatives. The sequence of reactivity of the halogen in the different positions of the ring system was also investigated. 6-Phenyl-4H-pyrido[1,2-a]pyrimidin-4-one could be prepared by thermal
钯催化的卤素衍生物的Suzuki-Miyaura交叉偶联反应 4 H-吡啶并[1,2- a ]嘧啶-4-一与(杂)芳基硼酸一起使用,即使从氯代衍生物中也可以很容易地获得该自行车的(杂)芳基和乙烯基衍生物。还研究了卤素在环系统不同位置的反应顺序。6-苯基-4 H-吡啶并[1,2- a ]嘧啶-4-一 可以通过热环化制备 异亚丙基(6-苯基吡啶-2-基氨基)亚甲基丙二酸酯,以及少量的7-苯基-1,4-二氢-1,8-萘啶-4-酮。
Method for treating tumors using 2-aryl-naphthyridin-4-ones
申请人:The University of North Carolina at Chapel Hill
公开号:US05994367A1
公开(公告)日:1999-11-30
The present invention provides compounds of Formula I: ##STR1## wherein A and R.sub.1 -R.sub.8 are defined herein. The compounds of Formula I inhibit the polymerization of tubulin and possess antimitotic activity. The compounds of Formula I may be useful for the treatment of psoriasis, gout, papiloma, warts, and a variety of tumors.
本发明提供了化合物的结构式 I:##STR1## 其中 A 和 R.sub.1 -R.sub.8 如本文所定义。结构式 I 的化合物抑制微管的聚合并具有抗有丝分裂活性。结构式 I 的化合物可能对治疗牛皮癣、痛风、乳头状瘤、疣和各种肿瘤有用。