Chemoselective Reductions of Nitroaromatics in Water at Room Temperature
作者:Sean M. Kelly、Bruce H. Lipshutz
DOI:10.1021/ol403079x
日期:2014.1.3
A robust and green protocol for the reduction of functionalized nitroarenes to the corresponding primary amines has been developed. It relies on inexpensive zinc dust in water containing nanomicelles derived from the commercially available designer surfactant TPGS-750-M. This mild process takes place at room temperature and tolerates a wide range of functionalities. Highly selective reductions can
Synergistic effects in Fe nanoparticles doped with ppm levels of (Pd + Ni). A new catalyst for sustainable nitro group reductions
作者:Haobo Pang、Fabrice Gallou、Hyuntae Sohn、Jeffrey Camacho-Bunquin、Massimiliano Delferro、Bruce H. Lipshutz
DOI:10.1039/c7gc02991h
日期:——
A remarkable synergistic effect has been uncovered between ppm levels of Pd and Ni embedded within iron nanoparticles that leads to mild and selective catalytic reductions of nitro-containing aromatics and heteroaromatics in water at room temperature. NaBH4 serves as the source of inexpensive hydride. Broad substrate scope is documented, along with several other features including: low catalyst loading
Safe and Selective Nitro Group Reductions Catalyzed by Sustainable and Recyclable Fe/ppm Pd Nanoparticles in Water at Room Temperature
作者:Jie Feng、Sachin Handa、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1002/anie.201604026
日期:2016.7.25
Fe/ppm Pd nanoparticles and PEG‐containing designer surfactants, a facile and selective reduction of nitro‐containing aromatics and heteroaromatics can be effected in water at roomtemperature in the presence of NaBH4. This new nanotechnology involves lowcatalystloadings, is highly chemoselective, and tolerates a wide variety of functional groups. The process, which includes recycling of the entire
Site-Selective Copper-Catalyzed Amination and Azidation of Arenes and Heteroarenes via Deprotonative Zincation
作者:Charles E. Hendrick、Katie J. Bitting、Seoyoung Cho、Qiu Wang
DOI:10.1021/jacs.7b07661
日期:2017.8.23
effective for a wide range of arenes, including nonactivated arenes bearing simple functionalities such as fluoride, chloride, ester, amide, ether, nitrile, and trifluoromethyl groups as well as heteroarenes including indole, thiophene, pyridine, and isoquinoline. An analogous C-H azidation is also accomplished using azidoiodinane for direct introduction of a useful azide group onto a broad scope of arenes
Beyond Directed <i>Ortho</i> Metalation: Ruthenium-Catalyzed Amide-Directed C<sub>Ar</sub>–N Activation/C–C Coupling Reaction of Anthranilamides with Organoboronates
作者:Yigang Zhao、Victor Snieckus
DOI:10.1021/ol501180q
日期:2014.6.20
A new, catalytic, and general methodology for the synthesis of biaryls and heterobiaryls by the cross coupling of anthranilamide derivatives (o-NMe2 benzamides) with aryl boroneopentylates is described. The reaction proceeds under catalytic RuH2(CO)(PPh3)3 conditions driven by the activation of the unreactive C–N bond by amide directing group (DG)-Ru catalyst chelation. High regioselectivity, orthogonality