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A NEW FACILE METHOD FOR THE SYNTHESIS OF AZACROWN ETHERS BY USING BENZYLSULFONAMIDE AS A SOURCE OF NITROGEN
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作者 Shu HUANG Bao Zhi TIAN Department of Chemistry,Sichuan University,Chengdu 610064 Shou Jun HOU Shu Mian LI Department of Chemical Engineering Chemistry,Zhengzhou Light Industry Institute,Zhengzhou 450002 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第12期963-964,共2页
Benzylsulfonamide was used as a source of nitrogen in the syn- thesis of azacrown ethers,and the cyclic intermediates were easily deben- zylsulfonylated by treating with CaF_2/H_2SO_4 to afford the azacrown ethers.
关键词 AS A NEW FACILE METHOD FOR THE SYNTHESIS OF azacrown ethers BY USING BENZYLSULFONAMIDE AS A SOURCE OF NITROGEN
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Synthesis and Adsorption Property of Dihydroxyl Azacrown Ether-Grafted Chitosan
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作者 Zhi Kuan YANG Li ZHUANG Yang YUAN 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第1期27-28,共2页
A novel dihydroxyl azacrown ether chitosan was synthesized by reacting dihydroxyl azacrown ether with epoxy activated chitosan. The adsorption property of the azacrown ether chitosan for Pb2+, Cr3+, and Ag+, were det... A novel dihydroxyl azacrown ether chitosan was synthesized by reacting dihydroxyl azacrown ether with epoxy activated chitosan. The adsorption property of the azacrown ether chitosan for Pb2+, Cr3+, and Ag+, were determined. The experimental results showed that the dihydroxyl azacrown ether grafted chitosan has high adsorption capacity and high selectivity for some metal ions. 展开更多
关键词 CHITOSAN azacrown ether adsorption property synthesis.
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Synthesis and DNA Cleavage Properties of Triazacrown Derivatives
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作者 Mingfeng Fang Li Wei +1 位作者 Zhongxiang Lin Guo-Yuan Lu 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2014年第2期142-150,共9页
New metal-free DNA cleaving reagent 1,1,4,7-triazacrown(TACN)both with aminoethyl,hydroxyethyl side arms and a planar anthraquinone linked by an alkyl(1,6-hexamethylene)spacer has been synthesized and characterized by... New metal-free DNA cleaving reagent 1,1,4,7-triazacrown(TACN)both with aminoethyl,hydroxyethyl side arms and a planar anthraquinone linked by an alkyl(1,6-hexamethylene)spacer has been synthesized and characterized by NMR and MS spectrometry.For comparison,the corresponding aminoethyl,hydroxyethyl triazacrown derivative 2 without the anthraquinone has also been synthesized.DNA-binding properties via fluorescence and CD spectroscopy indicate that the binding affinity of 1 with DNA is much stronger than that of 2.Agarose gel electrophoresis was used to assess plasmid pUC19 DNA cleavage.Kinetic data of DNA cleavage promoted by 1,2 and parent triazacrown(TACN)3 under physiological condition give the 15-fold and 234-fold rate acceleration of compound 1 over 2 and parent triazacrown 3.Radical scavenger inhibition study suggests that DNA cleavage promoted by 1 may be a non-oxidative pathway through the transphosphorylation and then hydrolysis.The dramatic rate acceleration is due not only to the anthraquinone moiety of compound 1 intercalating into DNA base pairs via stacking interaction,but also the cooperative catalysis of the nucleophilic hydroxyl and the electrophilic ammonium group for the cleavage of phosphodiester of DNA. 展开更多
关键词 artificial nuclease DNA cleavage METAL-FREE azacrown ether ANTHRAQUINONE
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Synthesis of a novel macrocyclic ligand containing bipyridine units
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作者 何永炳 LEHN Jean-Marie 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2000年第3期384-387,共4页
The 6-hydroxymethyl-6'-tetrahydropyranyloxymethyl-2, 2'-bipyridine (2) was synthesized by the reaction of 6,6'-dihydroxymethyl-2, 2'-bipyridine (1) with 3, 4-dihydroxypyran (DHP). 6.Tetrahydropyranylox... The 6-hydroxymethyl-6'-tetrahydropyranyloxymethyl-2, 2'-bipyridine (2) was synthesized by the reaction of 6,6'-dihydroxymethyl-2, 2'-bipyridine (1) with 3, 4-dihydroxypyran (DHP). 6.Tetrahydropyranyloxymethyl-6'-iodomethyl-2, 2'-bipyridine (5) was obtained from mesylate and iodizating reaction of compound 2. The coupling of 2 and 5 followed by hydrolysis gave bis(6'-hydroxymethyl-2, 2'-bipyridine-6-methyl) ether (7). The macrocyclic ligand 8 was obtained by treating 7 and 6, 6'-dibromethyl-2, 2'-bipyridine. The synthetic conditions of the intermediate 2 and macocyclic ligand 8 were discussed. 展开更多
关键词 azacrown ether bipyridine derivative macrocyclic ligand
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