Qianfa Jia
Guangdong University of Technology
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Publication
Featured researches published by Qianfa Jia.
Green Chemistry | 2014
Wenjun Li; Zhiyun Du; Jiayao Huang; Qianfa Jia; Kun Zhang; Jian Wang
A general organocatalytic 1,3-dipolar cycloaddition reaction between allyl ketones and various azides is reported. The reaction is catalyzed by a secondary amine to generate substituted 1,2,3-triazoles with high levels of regioselectivity.
International Journal of Nanomedicine | 2013
Yan He; Zhiyun Du; Huibin Lv; Qianfa Jia; Zhikai Tang; Xi Zheng; Kun Zhang; Fenghua Zhao
Eco-friendly green synthesis with plant extracts plays a very important role in nanotechnology, without any harmful chemicals. In this report, the synthesis of water-soluble silver nanoparticles was developed by treating silver ions with Chrysanthemum morifolium Ramat. extract at room temperature. The effect of the extract on the formation of silver nanoparticles was characterized by ultraviolet and visible absorption spectroscopy, X-ray diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy. The ultraviolet and visible absorption spectroscopy results show a strong resonance centered on the surface of silver nanoparticles (AgNP) at 430 nm. The Fourier transform infrared spectroscopy spectral study demonstrates Chrysanthemum morifolium Ramat. extract acted as the reducing and stabilizing agent during the synthesis. The X-ray diffraction analysis confirmed that the synthesized AgNP are single crystallines, corresponding with the result of transmission electron microscopy. Water-soluble AgNP, with an approximate size of 20 nm–50 nm were also observed in the transmission electron microscopy image. The bactericidal properties of the synthesized AgNP were investigated using the agar-dilution method and the growth-inhibition test. The results show the AgNP had potent bactericidal activity on Staphylococcus aureus and Escherichia coli, as well as a strong antibacterial activity against gram-negative bacteria, as compared to gram-positive bacteria with a dose-dependent effect, thus providing a clinical ultrasound gel with bactericidal property for prevention of cross infections.
Chemistry: A European Journal | 2014
Wenjun Li; Jia Wei; Qianfa Jia; Zhiyun Du; Kun Zhang; Jian Wang
A dienamine-mediated enantioselective 1,3-dipolar cycloaddition catalyzed by a chiral prolinol silyl ether catalyst has been developed. Removal of the benzamide group of the intermediates could furnish chiral C-1 substituted tetrahydroisoquinolines (see scheme) in high yields and excellent stereoselectivities.
Organic chemistry frontiers | 2017
Qianfa Jia; Zhiyun Du; Kun Zhang; Jian Wang
We report here the [3 + 2] cycloaddition reactions of in situ-generated aza-oxyallyl cations with commercially available α,β-unsaturated aldehydes or aldehydes, providing a rapid and efficient synthetic approach to access a variety of oxazolidin-4-ones in high yields.
RSC Advances | 2015
Lei Chen; Gongming Yang; Jian Wang; Qianfa Jia; Jia Wei; Zhiyun Du
An efficient [4+3] cycloaddition reaction of in situ generated aza-o-quinodimethanes with C,N-cyclic azomethine imines has been developed. A wide range of 1,2,4-triazepine derivatives were synthesized in high yields (81–99%).
RSC Advances | 2015
Gongming Yang; Qianfa Jia; Lei Chen; Zhiyun Du; Jian Wang
An organocatalytic inverse-electron-demand Diels–Alder reaction of ketones with 1,3,5-triazine through enamine catalysis has been developed. This method could furnish 4,5-disubstituted pyrimidines in good yields and high levels of regioselectivities.
European Journal of Organic Chemistry | 2015
Qianfa Jia; Gongming Yang; Lei Chen; Zhiyun Du; Jia Wei; Yanqiong Zhong; Jian Wang
Tetrahedron Letters | 2015
Qianfa Jia; Lei Chen; Gongming Yang; Jian Wang; Jia Wei; Zhiyun Du
Synlett | 2012
Qianfa Jia; Pooi Ming Shurn Benjamin; Jiayao Huang; Zhiyun Du; Xi Zheng; Kun Zhang; Allan H. Conney; Jian Wang
European Journal of Organic Chemistry | 2013
Jia Wei; Pengcheng Wang; Qianfa Jia; Jiaoyao Huang; Zhiyun Du; Kun Zhang; Jian Wang