Entity

Time filter

Source Type


Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Hefei University | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | Hao J.,Hefei University of Technology | And 4 more authors.
Chinese Chemical Letters | Year: 2015

Several γ-Al2O3 supported Pd-Ni bimetallic nanocatalysts (Pd-Ni (x:y)/Al2O3; where x and y represent the mass ratio of Pd and Ni, respectively) were prepared by the impregnation method and used for selective hydrogenation of cyclopentadiene to cyclopentene. The Pd-Ni/Al2O3 samples were confirmed to generate Pd-Ni bimetallic nanoparticles by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The catalytic activity was assessed in view of the effects of different mass ratios of Pd and Ni, temperature, pressure, etc. Among all the samples, the Pd-Ni (1:1)/Al2O3 (PN-1:1) catalyst showed extremely high catalytic ability. The conversion of cyclopentadiene and selectivity for cyclopentene can be simultaneously more than 90%. © 2015 Hua-Jian Xu.


Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Hefei University | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | Mao L.,Hefei University of Technology | And 3 more authors.
Tetrahedron | Year: 2015

Taking advantage of Pd(OAc)2-catalyzed dinitration reactions with Bi(NO3)3·5H2O in trifluoroethanol (TFE) and trifluoroacetic acid (TFA), we have developed an efficient and practical method for the synthesis of secondary dinitro-aromatic amines. The products could be applied to the preparation of 5-amine-N-methyl-benzimidazolone, the azo-dyes, economic advantages. The method has also been expanded to the dinitration reaction of some tertiary aromatic amines. © 2015 Elsevier Ltd. All rights reserved.


Liu W.-W.,Hefei University of Technology | Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Hefei University | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | And 3 more authors.
Chinese Chemical Letters | Year: 2016

In this work, Pd-Cu/γ-Al2O3 is prepared by the impregnation method and investigated for selective oxygenization of cyclopentene to cyclopentanone. A series of bimetallic Pd-Cu/γ-Al2O3 nanocatalysts were prepared and the structures characterized by XRD, XPS and TEM. We determined that the obtained Pd-Cu/γ-Al2O3 (molar ratio Pd:Cu=5:1) was an efficient catalyst for the oxygenization of cyclopentene to cyclopentanone with >95% selectivity and >85% conversion (100°C, 1MPa initial O2 pressure, 7h). © 2016 Yi-Si Feng.


Wang P.-F.,Hefei University of Technology | Wang X.-Q.,Hefei University of Technology | Dai J.-J.,Hefei University of Technology | Feng Y.-S.,Hefei University of Technology | And 3 more authors.
Organic Letters | Year: 2014

A silver-mediated decarboxylative C-S cross-coupling reaction of aliphatic carboxylic acid is described. This reaction occurs smoothly under mild conditions and shows good tolerance of functional groups. It provides an alternative approach for the synthesis of alkyl aryl sulfides. © 2014 American Chemical Society.


Cheng Z.-F.,Hefei University of Technology | Feng Y.-S.,Hefei University of Technology | Feng Y.-S.,Hefei University | Feng Y.-S.,Anhui Provincial Laboratory of Heterocyclic Chemistry | And 8 more authors.
Green Chemistry | Year: 2016

A general and efficient method for the direct alkynylation of unactivated C(sp3)-H bonds under metal-free conditions is described. The reaction performs smoothly under mild conditions and shows excellent functional-group tolerance. Initial mechanistic investigation indicates that the reaction may involve a radical pathway. © The Royal Society of Chemistry 2016.

Discover hidden collaborations