Compound 401是DNA-PK和mTOR抑制剂(IC50分别为0.28 μM和5.3 μM)。它对p110α/p85α PI3K没有明显抑制作用,在COS7细胞中抑制S6激酶在Thr389位的磷酸化和Akt在Ser473位的磷酸化。
靶点Target | Value |
---|---|
DNA-PK (Cell-free assay) | 0.28 μM |
mTOR (Cell-free assay) | 5.3 μM |
Compound 401是一种强效的DNA-PK抑制剂(IC50 = 0.28 μM)。据报道,它在体外对PI3K、ATM和ATR具有较差的抑制作用,但活性在于mTOR。Compound 401能有效抑制mTOR(IC50 = 5.3 μM),而对p110α/p85α PI3K(IC50 > 100 μM)没有明显影响。在细胞中,Compound 401会阻断由mTOR-Raptor和mTOR-Rictor复合体介导的S6激酶1 Thr389位和Akt Ser473位的磷酸化。相反,它不会直接抑制依赖于PI3K的Akt Thr308磷酸化。即使在缺乏DNA-PK的细胞中也能观察到类似的效果。Compound 401能够抑制免疫沉淀的mTOR或内源性mTOR(在Raptor免疫沉淀物中)。在5 μM和10 μM浓度下,抑制作用分别达到67%或78%。然而,在这些浓度下,p110α/p85α或p110β/p85α PI3K复合体的抑制作用较差。Compound 401能够抑制TSC1-/-纤维母细胞的增殖,而TSC1+/+细胞则表现出抗性。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-氯嘧啶并[2,1-a]异喹啉-4-酮 | 2-chloropyrimido[2,1-a]isoquinoline-4-one | 42398-55-0 | C12H7ClN2O | 230.653 |
While isoxazol-5(2H)-ones substituted with heterocycles at C2 but unsubstituted at C3 react with amines to give either amidines or malonamides, their reaction at low temperatures with lithium dialkylamides is a preparatively useful procedure for obtaining the amidines in most cases. Longer reaction times may lead to formation of pyrimidin-4-ones when ester groups are present at C4 of the isoxazolone.
Reaction of 2-heterocyclisoxazol-5(2H)-ones with bases leads to the formation of ketenimines, which react with nucleophiles in competition with intramolecular reactions. Such reactions in the presence of enamines, enamine anions or enolates are reported. Enamines undergo addition through carbon and nitrogen to the ketenimine in competition with direct addition-elimination to the isoxazolone. Enolates of imines or ketones add to the ketenimine to give a mixture of products: only the reaction with the enolate of cyclohexanone is sufficiently specific to provide a useful new synthetic procedure.