Direct Synthesis of 3-Acylindoles through Rhodium(III)-Catalyzed Annulation of<i>N</i>-Phenylamidines with α-Cl Ketones
作者:Jianhui Zhou、Jian Li、Yazhou Li、Chenglin Wu、Guoxue He、Qiaolan Yang、Yu Zhou、Hong Liu
DOI:10.1021/acs.orglett.8b03383
日期:2018.12.7
versatile 3-acylindoles through Rh(III)-catalyzed C–H activation and annulation cascade of N-phenylamidines with α-Cl ketones was developed, in which α-Cl ketones serve as unusual one-carbon (sp3) synthons. This strategy features high regioselectivity, efficiency, wide substrate tolerance, and mild reaction conditions, which further underscore its synthetic utility in drug molecule synthesis.
A new practical carbon-nitrogen bond formation reaction of amidines with ethyl acetoacetate to synthesize imidazoles via oxidative cyclization in the presence of bromide. The reactions were occured under mild and metal-free conditions.
Regiospecific Synthesis of 1,2-Disubstituted (Hetero)aryl Fused Imidazoles with Tunable Fluorescent Emission
作者:Dongbing Zhao、Junyi Hu、Ningjie Wu、Xiaolei Huang、Xurong Qin、Jingbo Lan、Jingsong You
DOI:10.1021/ol202807d
日期:2011.12.16
A palladium-catalyzed two or fourfold amination was established that allows regiospecific synthesis of a diversity-oriented library of 1,2-disubstituted (hetero)aryl fused imidazoles, and provides an exceptional tool for the discovery of fluorescent scaffolds with tunable fluorescence emission. These fluorophores have been applied as fluorescent probes for live cell imaging.
Rhodium(III)-Catalyzed [4 + 2] Annulation of <i>N</i>-Arylbenzamidines with Propargyl Alcohols: Highly Regioselective Synthesis of 1-Aminoisoquinolines Controlled by Noncovalent Interaction
作者:Jie Ren、Chao Pi、Xiuling Cui、Yangjie Wu
DOI:10.1021/acs.orglett.1c02077
日期:2021.9.3
A highly regioselective synthesis of 1-aminoisoquinolines has been explored via rhodium(III)-catalyzed C–H bond activation/annulation reactions of propargyl alcohols with N-arylbenzamidines. The imidamide was used as the directing group and the nitrogen source of the heterocycle and for regulating the regioselective migratory insertion of propargyl alcohol through a hydrogen bond. In this transformation
A novel AIE-active boron difluoride fluorescent probe P3T was designed and synthesized. P3T exhibited high sensitivity to intra- and extra-cellular pH changes. Furthermore, a Förster resonance energy transfer (FRET) system was constructed.