通过铜催化的串联Ullmann C–N偶联/叠氮化物-炔烃环加成反应取代三唑并[1,5- a ] [1,4]苯并二氮杂化物的简便方法
摘要:
已经描述了一种合成三唑并[1,5- a ] [1,4]苯并二氮杂苯的方法,该方法包括铜催化的串联Ullmann C–N偶联反应,然后进行叠氮化物-炔烃环加成反应。在CuI和碱存在下,邻叠氮基苄基溴化物和N-炔丙基化苯胺衍生物的反应导致三唑并[1,5- a ] [1,4]苯并二氮杂卓的形成。通过合成许多三唑并[1,5- a ] [1,4]苯并二氮杂卓衍生物,已成功地成功推广了该反应。
Unusual group migration and C(sp3)–H activation leading to stable metallacycles in the reactions of Cp*IrS2C2B10H10 and aryl azides
作者:Wei Zhong、Mingshi Xie、Qibai Jiang、Yizhi Li、Hong Yan
DOI:10.1039/c2cc16943f
日期:——
The thermal or photochemical reactions of Cp*IrS(2)C(2)B(10)H(10) (1) and aryl azides lead to C-C coupling viaC(sp(3))-H activation in 2 as well as the formation of C-S bonds and new-type SSN pincer ligands in 3-8 through ortho-substituted electron-withdrawing group migration over an aryl ring.
We used the concept of bioisosteres to design and synthesize a novel series of dasatinib derivatives for the treatment of leukemia. Unfortunately, most of the dasatinib derivatives did not show appreciable inhibition against leukemia cell lines K562 and HL60. However, acrylamide compound 2c had comparable inhibitory activity with dasatinib against K562 cells (IC50 = 0.039 nM vs. 0.069 nM). And amide compound 2a and acrylamide compound 2c also had comparable inhibitory activity with dasatinib against the leukemia cell line HL60 (IC50 = 0.25 nM and 0.26 nM vs. 0.11 nM). Against the leukemia progenitor cell line KG1a, triazole compounds 15a and 15d-15f and oxadiazole compounds 24a-24d were more potent than dasatinib. In particular, the hydroxyl compounds 15a and 24a were about 64 and 180 fold more potent than dasatinib against KG1a cells (IC50 = 0.14 mu M and 0.05 mu M vs. 8.98 mu M). Compounds 15a and 24a also inhibited colony formation in MCF-7 cells and inhibited cell migration in the cell wound scratch assay in B16BL6 cells. Moreover, hydroxyl compounds 15a and 24a had low toxicity in vivo. (C) 2018 Elsevier Ltd. All rights reserved.