New synthetic approach to paullones and characterization of their SIRT1 inhibitory activity
作者:Sara Soto、Esther Vaz、Carmela Dell'Aversana、Rosana Álvarez、Lucia Altucci、Ángel R. de Lera
DOI:10.1039/c2ob06695e
日期:——
A series of 7,12-dihydroindolo[3,2-d][1]benzazepine-6(5H)-ones (paullones) substituted at C9/C10 (Br) and C2 (Me, CF3, CO2Me) have been synthesized by a one-pot Suzuki–Miyaura cross-coupling of an o-aminoarylboronic acid and methyl 2-iodoindoleacetate followed by intramolecular amide formation. Other approaches to the paullone scaffold based on Pd-catalyzed C–H activation were unsuccessful. In vitro enzymatic assay with recombinant human SIRT-1 indicated a strong inhibitory profile for the series, in particular the analogue with a methoxycarbonyl group at C2 and a bromine at C9. These compounds are, in general, inducers of granulocyte differentiation of the U937 acute leukemia cell line and cause a marked increase in pre-G1 of the cell cycle.
一系列9,10-二溴代和2-甲基、2-三氟甲基、2-甲氧羰基取代的7,12-二氢吲哚并[3,2-d][1]苯并氮杂环庚-6(5H)-酮(paullones)通过一锅法Suzuki-宫浦交叉偶联反应合成,该方法涉及邻氨基芳基硼酸和甲基2-碘吲哚乙酸酯的反应,随后进行分子内酰胺化。基于钯催化的C-H活化的其他制备paullone骨架的方法未获成功。体外酶学分析显示,这些化合物对重组人SIRT-1具有强烈的抑制作用,尤其是2-甲氧羰基和9-溴代的类似物。这些化合物一般都能诱导U937急性白血病细胞系的粒细胞分化,并显著增加细胞周期中的前G1期。