l-Pipecolinic acid derived Lewis base organocatalyst for asymmetric reduction of N-aryl imines by trichlorosilane: effects of the side amide group on catalytic performances
作者:Zhouyu Wang、Chao Wang、Li Zhou、Jian Sun
DOI:10.1039/c2ob26772a
日期:——
A series of N-formamides derived from pipecolinic acid have been synthesized and tested as Lewisbase catalysts for the enantioselective reduction of N-aryl imines by trichlorosilane. Through the investigation of the structure–efficacy relationship between the side amide group and catalytic performance, several highly effective catalysts were discovered. In particular, arylamido-type catalyst 5i and
A series of “half-sandwich” Schiff-base Ir(III) complexes were synthesized and investigated for their in vitro activities against the leukemia K562 cell line. These compounds demonstrated antiproliferative activities against K562 cells with IC50 values of 0.26–4.77 μM. In particular, compound 10c showed cytotoxicity against five cancer cell lines/sublines and stronger activities than cisplatin in K562
Synthesis of 3-methyleneisoindolin-1-ones via palladium-catalyzed C–Cl bond cleavage and cyclocarbonylation of ortho-chloro ketimines
作者:Jia Ju、Chuanmei Qi、Liyao Zheng、Ruimao Hua
DOI:10.1016/j.tetlet.2013.07.017
日期:2013.9
PdCl2(PCY3)(2)-catalyzed cyclocarbonylative coupling of ortho-chloro arylketimines with CO has been investigated to develop an efficient method for the synthesis of isoindolin-1-ones. The developed synthetic method has the advantages of having easily available starting materials, high atom-economy, and high selectively. (C) 2013 Elsevier Ltd. All rights reserved.
Copper-Catalyzed Cascade Cycloamination of α-Csp<sup>3</sup>–H Bond of N-Aryl Ketimines with Azides: Access to Quinoxalines
A copper-catalyzed cycloamination of α-Csp3–H bond of N-aryl ketimines with sodium azide has been developed. This methodology provides an efficient access to quinoxalines and features mild reaction conditions and readily available ketimines with diverse functional group tolerance.
Reaction and Mechanistic Studies of Heterogeneous Hydroamination over Support-Stabilized Gold Nanoparticles
作者:Manideepa Sengupta、Arijit Bag、Subhasis Das、Astha Shukla、L. N. Sivakumar Konathala、C. A. Naidu、Ankur Bordoloi
DOI:10.1002/cctc.201600762
日期:2016.10.6
Highly stable goldnanoparticles (GNPs) around 5–6 nm have been prepared by in situ reduction of chloroauric acid on the surface of nitrogen‐rich mesoporous carbon (MCN) without adding any extra stabilizing agent. The synthesized materials have been efficiently utilized as a catalyst for the truly heterogeneoushydroamination of phenylacetylene with aniline. Large turnover numbers (42×106) were achieved