Rhodium(<scp>iii</scp>)-catalyzed regioselective C2-amidation of indoles with N-(2,4,6-trichlorobenzoyloxy)amides and its synthetic application to the development of a novel potential PPARγ modulator
作者:Jingjing Shi、Guanguan Zhao、Xiaowei Wang、H. Eric Xu、Wei Yi
DOI:10.1039/c4ob00637b
日期:——
new and efficient method for the direct regioselective C2-amidation of various functionalized indoles with several N-(2,4,6-trichlorobenzoyloxy)amides via Rh(III)-catalyzed C–H activation/N–O cleavage/C–N formation using the pyrimidyl group as a readily installable and removable directing group has been developed. With this method, a variety of valuable 2-amido indoles can be easily prepared under mild
通过Rh(III)催化的C–H活化/ N–O裂解/ C–N直接与几种N-(2,4,6-三氯苯甲酰氧基)酰胺直接进行区域选择性C2酰胺化的新型高效方法已经开发了使用嘧啶基作为易安装和可移除的导向基团的β-己内酰胺基。用这种方法,可以在温和的条件下,以宽泛的官能团耐受性和出色的区域/位点特异性轻松制备各种有价值的2-酰胺基吲哚。还证明了该策略在作为新型PPARγ调节剂的目标化合物6的合成中的应用。生物学评估的结果表明,化合物6与目前市售的抗糖尿病药物罗格列酮相比,具有部分PPARγ激动活性和强大的PPARγ结合亲和力,IC 50值为120.0 nM,并且脂肪细胞分化能力较弱,这表明该化合物的进一步开发可能是非常感兴趣。