3-Substituted biquinolinium inhibitors of AraC family transcriptional activator VirF from S. flexneri obtained through in situ chemical ionization of 3,4-disubstituted dihydroquinolines
3-Substituted biquinolinium inhibitors of AraC family transcriptional activator VirF from S. flexneri obtained through in situ chemical ionization of 3,4-disubstituted dihydroquinolines
Cobalt(III)‐Catalyzed, DMSO‐Involved, and TFA‐Controlled Regioselective C−H Functionalization of Anilines with Alkynes for Specific Assembly of 3‐Arylquinolines
作者:Peiquan Zhang、Yurong Yang、Zhiyong Chen、Zhang Xu、Xuefeng Xu、Zhi Zhou、Xiyong Yu、Wei Yi
DOI:10.1002/adsc.201801709
日期:2019.6.18
Herein, a novel cobalt(III)‐catalyzed and TFA‐controlled [3+2+1] cyclization of diverse anilines and terminal alkynes has been realized by using DMSO as both the solvent and the C1 source, which led to the specific synthesis of privileged 3‐arylquinolines in one pot and regioselectively. Mechanistic investigations revealed that this versatile transformation might be initiated with a C−H activation
alcohols, benzaldehydes, and DMSO to quinolines has been disclosed. For the reported annulation between 2-aminobenzyl alcohols and benzaldehydes, the change of the solvent from toluene to DMSO led to the change of the product from the diheteroatomic cyclic benzoxazines to monoheteroatomic cyclic quinolines. This annulation can be used to synthesize regioselectively different substituted quinolines
achieving high activity and selectivity, and allows a wide range of 3‐arylquinoline derivatives to be obtained in high yields. Moreover, a relevant mechanism is proposed, revealing that un der the palladium(II) catalysis a migratory insertion to C‐3H of quinolines and insertion to the CH of arenes are key steps in this reaction. Mild reaction conditions and high selectivity of the reactive site provide
已经开发了一种使用碳酸银(Ag 2 CO 3)和双氧(O 2)作为氧化剂合成3-芳基喹啉衍生物的新方案。在这种方法中,作为母体试剂的喹啉在乙酸钯[Pd(OAc)2 ]催化下与芳烃与1-金刚烷羧酸(Adm)发生反应。发现1-金刚烷羧酸配体和钯催化剂的结合是实现高活性和选择性的重要因素,并且可以高收率获得各种3-芳基喹啉衍生物。此外,提出了一种相关的机理,揭示了在钯(II)催化下迁移迁移至C- 3喹啉和插入到C h的芳烃的H的在该反应中的关键步骤。温和的反应条件和高选择性的反应位点为潜在的药物发现和功能材料应用提供了潜力。
[3+1+1+1] Annulation to the Pyridine Structure in Quinoline Molecules Based on DMSO as a Nonadjacent Dual-Methine Synthon: Simple Synthesis of 3-Arylquinolines from Arylaldehydes, Arylamines, and DMSO
A [3+1+1+1] annulation of arylamines, arylaldehydes, and dimethyl sulfoxide (DMSO) to the pyridine structure in quinolines using DMSO as a nonadjacent dual-methine (═CH−) synthon is disclosed. In this annulation, arylamines provide two carbon atoms and one nitrogen atom, arylaldehydes furnish one carbon atom, and DMSO provides two nonadjacent methines (═CH−) to the pyridine ring in quinoline molecules