Intermolecular Reductive C–N Cross Coupling of Nitroarenes and Boronic Acids by P<sup>III</sup>/P<sup>V</sup>═O Catalysis
作者:Trevor V. Nykaza、Julian C. Cooper、Gen Li、Nolwenn Mahieu、Antonio Ramirez、Michael R. Luzung、Alexander T. Radosevich
DOI:10.1021/jacs.8b10769
日期:2018.11.14
intermolecular C-N coupling is reported. The method employs a small-ring organophosphorus-based catalyst (1,2,2,3,4,4-hexamethylphosphetane) and a terminal hydrosilane reductant (phenylsilane) to drive reductive intermolecular coupling of nitro(hetero)arenes with boronic acids. Applications to the construction of both Csp2-N (from arylboronic acids) and Csp3-N bonds (from alkylboronicacids) are demonstrated;
The present invention provides compounds of Formula I,
1
including pharmaceutically acceptable salts and/or prodrugs thereof, where G, R
2
, and R
3
are defined as described herein.
本发明提供了公式I的化合物,包括其药学上可接受的盐和/或前药,其中G、R2和R3的定义如本文所述。
Boryl (Hetero)aryne Precursors as Versatile Arylation Reagents: Synthesis through CH Activation and Orthogonal Reactivity
作者:Emilien Demory、Karthik Devaraj、Andreas Orthaber、Paul J. Gates、Lukasz T. Pilarski
DOI:10.1002/anie.201503152
日期:2015.9.28
(Pinacolato)boryl ortho‐silyl(hetero)aryl triflates are presented as a new class of building blocks for arylation. They demonstrate unique versatility by delivering boronate or (hetero)arynereactivity chemoselectively in a broad range of transformations. This approach enables the unprecedented postfunctionalization of fluoride‐activated (hetero)aryneprecursors, for example, as substrates in transition‐metal
PEt3-mediated deoxygenative C N coupling of nitroarenes and boronic acids
作者:Trevor V. Nykaza、Junyu Yang、Alexander T. Radosevich
DOI:10.1016/j.tet.2019.03.035
日期:2019.6
A method for the preparation of aryl- and heteroarylamine products by triethylphosphine-mediated deoxygenativecoupling of nitroarenes and boronic acids is reported. This method provides access to an array of functionalized (hetero)arylamine products from readily available starting materials under the action of an inexpensive commercial reagent. The developed triethylphosphine-mediated transformation
syntheses of chiral tetrahydroindole pyrazolinones by the asymmetric [3 + 2] cascade cyclizations (indolizations) of simple aniline derivatives with pyrazolinone ketimines as 2C synthons. The chiral phosphoric-acid-catalyzed system uses a concerted π–π interaction/dual H-bond control strategy to catalytically direct the asymmetric aniline, which undergoes a highly chemo-, regio-, and enantioselective [3 +