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6篇 您的检索式:作者名="Nianfa Yang"
    题名 作者 年代 出处 被引量
1Highly regioselective cyclotrimerization of terminal alkynes catalyzed by Fe(II) complexes bearing 2-(benzimidazolyl)-6-(1-(arylimino)ethyl)pyridines显示文摘Yongbing Liu Xiaoyu Yan Nianfa Yang Chanjuan Xi 2010Catalysis Communications2010,,6:1
2Helical Poly(α,β-unsaturated ketone)with Bulky Pendant of Binaphthyl from Anionic Polymerization of(−)-Menthyl(S)-6'-Acrylyl-2'-methyloxy-1,1'-binaphthalene-2-carboxylate显示文摘(−)-Menthyl(S)-6'-acrylyl-2'-methyloxy-1,1'-binaphthalene-2-carboxylate(3)was synthesized and anionically polymerized using n-BuLi as an initiator in toluene.The monomer 3 was levorotatory and had an[α]_(D)^(25)value of−72.4,but its corresponding polymer poly-3 was dextrorotatory and showed an[α]_(D)^(25)value of+162.0.Poly-3 was confirmed to exist in the form of one-handed helical structure in solution by means of comparing the specific optical rotation and the CD spectra with that of 3 and the model compounds such as(−)-menthyl(S)-6'-propionyl-2'-methyloxy-1,1'-binaphthalene-2-carboxylate 2b and(−)-menthyl(S)-6'-heptanoyl-2'-methyloxy-1,1'-binaphthalene-2-carboxylate 2c.This conclusion was also confirmed by the fact that the g-value of poly-3 is about 11 times of that of monomer 3.Yehui Chen Liwen Yang Nianfa Yang Zhusheng Yang Jin Zhang 2014Chinese Journal of Chemistry2014,32,3:1
3Optically Active Helical Poly[(S)-3-vinyl-2,2'-dihydroxy-1,1'-binaphthyl]:New Ligand for Asymmetric Addition of Diethylzinc to Aryl Aldehyde显示文摘Poly[(S)-3-vinyl-2,2'-dihydroxy-1,1'-binaphthyl](L*)was obtained by taking off the protecting groups of poly[(S)-3-vinyl-2,2'-bis(methoxymethoxy)-1,1'-binaphthyl](poly-1).L*was proved to keep a stable helical con-formation in solution.The application of helical L*in the asymmetric addition of diethylzinc to aldehydes has been studied.The catalytic system employing 10 mol%of L*and 150 mol%of Ti(OiPr)_(4) was found to promote the addi-tion of diethylzinc to a wide range of aromatic aldehydes,giving up to 99%enantiomeric excess(ee)and up to 93%yield of the corresponding secondary alcohol at 0℃.The chiral polymer can be easily recovered and reused with-out loss of catalytic activity as well as enantioselectivity.Yehui Chen Guochang Qin Liwen Yang Nianfa Yang 2015Chinese Journal of Chemistry2015,33,4:0
4Synthesis of a Newly Modified Poly-H8-BINOL Ligand and Its Applications in the Asymmetric Addition of Triethylalumininm to Aromatic Aldehydes显示文摘LIU Can OUYANG Kunbing YANG Nianfa 2017Chemical Research in Chinese Universities2017,33,5:0
5Graft of Chiral Amino Alcohol onto Poly(menthyl vinyl ketone) and the Grafted Polymer's Inducement to the Asymmetric Addition of Phenylacetylene to Aromatic Ketone显示文摘LIU Can ZHOU Ya YANG Liwen YANG Nianfa ZHANG Anlin 2015Chemical Research in Chinese Universities2015,31,4:0
6A Novel RAFT Polymerization under UV Radiation at Ambient Temperature显示文摘Nianfa Yang, Lican Lu, Yuanli Cai (College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China) 2005复旦学报(自然科学版)2005,44,5:0
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