Palladium-Catalyzed [3+3] Annulation between Diarylamines and α,β-Unsaturated Acids through CH Activation: Direct Access to 4-Substituted 2-Quinolinones
作者:Rajesh Kancherla、Togati Naveen、Debabrata Maiti
DOI:10.1002/chem.201500774
日期:2015.6.1
A CHactivation strategy has been successfully employed for the high‐yielding synthesis of a diverse array of 4‐substituted2‐quinolinone species by a palladium‐catalyzed dehydrogenative coupling involving diarylamines. This intermolecular annulation approach incorporates readily available α,β‐unsaturated carboxylic acids as the couplingpartner by suppressing the facile decarboxylation. Based on
AC ħ激活策略已被成功地用于通过涉及二芳基胺钯催化脱氢偶联高产合成4-取代的2-喹啉酮物种的多样性阵列的。这种分子间环化方法通过抑制容易的脱羧作用,结合了易于获得的α,β-不饱和羧酸作为偶联伴侣。在初步的机理研究的基础上,提出了一个反应顺序,包括邻,π-配位,β-迁移插入和β-氢化物消除。
Diamines as interparticle linkers for silica–titania supported PdCu bimetallic nanoparticles in Chan–Lam and Suzuki cross-coupling reactions
作者:Babita Jamwal、Manpreet Kaur、Harsha Sharma、Chhavi Khajuria、Satya Paul、J. H. Clark
DOI:10.1039/c8nj05050c
日期:——
The remarkable synergetic effect between Pd and Cu, and basic nitrogen sites on the support effectively stabilize the nanoparticles and enhance the catalytic activity.
Pd和Cu之间的卓越协同效应,以及支撑物上的碱性氮位点有效地稳定了纳米颗粒,并增强了催化活性。
Synthesis of Di(hetero)arylamines from Nitrosoarenes and Boronic Acids: A General, Mild, and Transition-Metal-Free Coupling
作者:Silvia Roscales、Aurelio G. Csákÿ
DOI:10.1021/acs.orglett.8b00473
日期:2018.3.16
The synthesis of di(hetero)arylamines by a transition-metal-free cross-coupling between nitrosoarenes and boronicacids is reported. The procedure is experimentally simple, fast, mild, and scalable and has a wide functional group tolerance, including carbonyls, nitro, halogens, free OH and NH groups. It also permits the synthesis of sterically hindered compounds.
Sulfonato-diketimine Copper(II) Complexes: Synthesis and Application as Catalysts in Chan–Evans–Lam Couplings
作者:Valérie Hardouin Duparc、Frank Schaper
DOI:10.1021/acs.organomet.7b00397
日期:2017.8.28
a diketimino-sulfonate ligand, LCu(NO3)(NCMe), were prepared and proved to be stable to water for several hours in solution. Prolonged standing in the presence of water or strong bases led to desulfonation of the ligand. LCu(NO3) was inactive in the polymerization of lactide (in the presence of benzyl alcohol), but showed high activity for the Chan–Evans–Lam coupling of a variety of amines and anilines
Highly Chemoselective Iridium Photoredox and Nickel Catalysis for the Cross-Coupling of Primary Aryl Amines with Aryl Halides
作者:Martins S. Oderinde、Natalie H. Jones、Antoine Juneau、Mathieu Frenette、Brian Aquila、Sharon Tentarelli、Daniel W. Robbins、Jeffrey W. Johannes
DOI:10.1002/anie.201604429
日期:2016.10.10
visible‐light‐promoted iridium photoredox and nickel dual‐catalyzedcross‐coupling procedure for the formation C−N bonds has been developed. With this method, various aryl amines were chemoselectively cross‐coupled with electronically and sterically diverse aryl iodides and bromides to forge the corresponding C−N bonds, which are of high interest to the pharmaceutical industries. Aryl iodides were found to be a more