strategy for the synthesis of unsymmetrically disubstituted tetraphenylenes from 2-acetylbiphenylene has been developed via ruthenium-catalyzedC–Hfunctionalization. Four reactions, including alkenylation–cyclization, alkenylation, alkylation, and amidation, were achieved. The reactions provide easy access to a variety of unsymmetrically disubstituted tetraphenylene derivatives, which could accelerate research
Nickel-Catalyzed Cyanation of Aryl Halides and Hydrocyanation of Alkynes via C–CN Bond Cleavage and Cyano Transfer
作者:Hui Chen、Shuhao Sun、Yahu A. Liu、Xuebin Liao
DOI:10.1021/acscatal.9b04586
日期:2020.1.17
methods to prepare aryl nitriles and vinyl nitriles from arylhalides and alkynes, respectively. Using inexpensive and non-toxic 4-cyanopyridine N-oxide as the cyano shuttle, the methods provide an efficient approach to prepare aryl cyanides and vinyl nitriles under mild and operationally simple reaction conditions with a broad range of functional group tolerance. In hydrocyanation of alkynes, the method
The Rh(III)-catalyzed coupling of N-chloroimines with alkynes for the efficientsynthesis of isoquinolines is reported. This represents the first use of the N-Cl bond of N-chloroimines as an internal oxidant for construction of the isoquinoline skeleton. The synthesis features atom and step economy, a green solvent (EtOH), mild reaction conditions, and a broad substrate scope.2020 Elsevier Ltd. All
Synthesis of 1-Benzyl-, 1-Alkoxyl-, and 1-Aminoisoquinolines via Rhodium(III)-Catalyzed Aryl C–H Activation and Alkyne Annulation
作者:Yiming Zhou、Ruimao Hua
DOI:10.1021/acs.joc.1c00786
日期:2021.7.2
(DGauto)-assisted, rhodium(III)-catalyzed aryl C–H activation and annulation with internal alkynes were developed. The reactions affording 1-benzylisoquinolines involve a cascade oximation of diarylacetylenes with hydroxylamine, forming aryl benzyl ketone oxime, and oxime-assisted rhodium(III)-catalyzed aryl C–H activation and followed annulation with another molecule of diarylacetylene in a one-pot manner
Versatile Pyrrole Synthesis through Ruthenium(II)-Catalyzed Alkene C–H Bond Functionalization on Enamines
作者:Lianhui Wang、Lutz Ackermann
DOI:10.1021/ol303224e
日期:2013.1.4
An efficient ruthenium(II) catalyst enabled broadly applicable oxidative alkyne annulations with electron-rich enamines to provide diversely decorated pyrroles, even in an aerobic fashion with air as the ideal oxidant.