检索结果-南通市图书馆

A "one-pot" synthesis of α-(p-toluenesulfonyl)-aminobenzylphosphinodipeptide derivatives containing a P-N bond

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of chemistry 1997年第3期15卷 283-285页

作者： DAI, Qing CHEN, Ru-YuState Key Laboratory of Elemento-organic chemistry, institute of Elemento- organic chemistry, Nankai University, Tianjin 300071, china State Key Laboratory of Elemento-organic chemistry Institute of Elemento-Organic Chemistry Nankai University Taanjin 300071 China [*]State Key Laboratory of Elemento-organic chemistry Institute of Elemento-Organic Chemistry Nankai University Taanjin 300071 China

With acetyl chloride as the solvent, the condensation reaction of p-toluenesulfonamide, an aromatic aldehyde and phenyldichlorophosphine gives a reactive intermediate, a-(p-toluenesulfonyl)-aminobenzylphosphinic chloride, which reacts with glycine ethyl ester to give the corresponding phos-phinopeptide (6) containing a P-N bond directly.

关键词： synthesis of aminobenzylphosphinodipeptide derivatives containing a P-N bond one-pot p-toluenesulfonyl ppm

Free radical fluoroalkylation of terminal alkenes and alkynes with iododifluoromethanesulfonamides

在线全文

学校读者我要写书评

暂无评论

Science china chemistry 2011年第1期54卷 95-102页

作者： ZHU JieMing,WANG Fei & HU JinBo cas Key Laboratory of Organofluorine chemistry Shanghai institute of organic chemistry,Chinese Academy of Sciences,Shanghai 200032,china 1. cas Key Laboratory of Organofluorine chemistry Shanghai institute of organic chemistry Chinese Academy of Sciences Shanghai 200032 China

Free radical fluoroalkylation of terminal alkenes and alkynes with iododifluoromethanesulfonamides has been successfully *** was found that both the catalytic amount of sodium dithionite (Na2S2O4) and the stoichiometr... 详细信息

关键词： radical fluoroalkylation sulfonamide fluorine alkene alkyne

Study on the stannous halides promoted addition of 1,1,1-trichloro-2,2,2-trifluoroethane to aldehydes and the chemical transformation thereof

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of chemistry 1994年第2期12卷 183-189页

作者： HU, Chang-Ming CHEN, JianShanghai institute of organic chemistry, Chinese Academy of Sciences, Shanghai 200032, china Shanghai institute of organic chemistry Chinese Academy of Sciences Shanghai 200032 China

Promoted by stannous salts, 1,1,1-trichloro-2,2,2-trifluoroethane reacts readily with aliphatic, aromatic, and α, β-unsaturated aldehydes giving the corresponding alcohols bearing a CF3CCl2-moiety in good to excelle... 详细信息

关键词： 1,1,1-Trichloro-2,2,2-trifluoroethane aldehydes stannous halides addition Jones oxidation ketones.

SYNTHESIS AND CHARACTERIZATION OF A NOVEL FLUORINE-CONTAINING HYDROPHOBICALLY ASSOCIATING POLYMER

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 1999年第3期17卷 281-288页

作者： Jin Yang Wei-yuan Huang Laboratory of Organofluorine chemistry, Shanghai institute of organic chemistry, Chinese Academy of Sciences, Shanghai 200032, china Chinese Acad Sci Shanghai Inst Organ Chem Lab Organofluorine Chem Shanghai 200032 Peoples R China

In this article, the synthesis and characterization of a novel fluoromonomer and its copolymer with acrylamide is reported. 2-perfluoroamyl-4-hydroxylquinoline 2 was synthesized from ethyl 2, 2-dihydroperfluoroheptanoate in high yields. The monomer 4 was then synthesized from 2 in two steps readily in high yields. Synthesis and characterization of copolymers of acrylamide (AM) and the fluoromonomer were investigated. The composition and intrinsic viscosity of these copolymers were studied. It was found that the rheological properties of aqueous solutions of polyacrylamide were modified significantly when a small proportion of the fluoromonomer 4 was incorporated on investigating the viscosity-concentration profiles, pseudoplasticity of these solutions and the effect of the presence of surfactant. These results could be explained by the hydrophobic association of the fluorocarbon segments in the aqueous solutions of these copolymers.

关键词： hydrophobically associating polymer fluorine-containing acrylate perfluoroalkylation with RFI/Na2S2O4

Studies of di[(phenyldimethylsilyl)methyl]-methyltin dithiophosphates

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of chemistry 1994年第5期12卷 449-455页

作者： XIE, Qing-Lan SHA, Yin-Lin institute of Elemento-organic chemistry, Nankai University, Tianjin 300071, china institute of Elemento‐organic chemistry Nankai University Tianjin 300071 China

Thirteen derivatives of di[(phenyldimethylsilyl)methyl]methyltin dithiophosphates have been synthesized and characterized by the elemental analysis, IR, 1H, 13C,119Sn NMR and MS. The results show that they are four-coordinated. The preliminary bioassay reveals that they have good acaricidal activity and some of them have insecticidal, herbicidal activities at the same time.

关键词： Organotin organosilicon dithiophoephate NMR bioassay.

SYNTHESIS OF SOAP-FREE ACRYLIC HYDROSOLS

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2002年第6期20卷 531-536页

作者： Li Jia Zong-hui Liu De-qing Wei Chengd institute of organic chemistry Chinese Academy of Sciences, Chengdu 610041, china Chinese Acad Sci Chengdu Inst Organ Chem Chengdu 610041 Peoples R China

Poly(methyl methacrylate/ethyl acrylate/acrylic acid) hydrosols were prepared by employing soap-free polymerization, and (acrylic acid/butyl acrylate) oligomer was used as the polymeric surfactant. The effect of reaction condition on the morphology and particle size of the hydrosols was investigated. The minimum amount of acrylic acid in the hydrosols is 2%. The maximum weight average molecular weight (M-w) of polymer that assures soap-free emulsion conversion into hydrosol is about 1.2 x 10(5)-1.3 x 10(5). The particle transforming process was investigated, and an obvious change of particle diameter and morphology was observed.

关键词： hydrosol acrylic resin water-borne resin soap-free polymerization

A facile synthesis of per (poly )fluoroalkyl substituted α-amino acid derivatives

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of chemistry 1997年第3期15卷 286-288页

作者： HU, Qiao-Sheng HU, Chang-MingLaboratory of Organofluorine chemistry, Shanghai institute of organic chemistry, Chinese Academy of Sciences, Shanghai 200032, china Laboratory of Organofluorine chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China [*]Laboratory of Organofluorine chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Initiated by CrCl3/Fe redox couple, per(poly)fluoroalkyl iodides added to methyl a-acetylamino acrylate, giving B-per(poly)fluoroalkyl a-amino acid derivatives in good yields.

关键词： Per(poly)fluoroalkyl iodides a-acetylaminoacrylate chromic chloride/iron

Interfacial behaviors of PMMA-PEO block copolymers at the air/water interface

在线全文

学校读者我要写书评

暂无评论

Science china chemistry 2005年第6期48卷 567-573页

作者： CHENG Caixia1, JIAO Tifeng2, TANG Rupei1, LIU Minghua2 & XI Fu1 1. State Key Laboratory of Polymer Physics and chemistry, Joint Laboratory of Polymer Science and Materials, institute of chemistry, Chinese Academy of Sciences, Beijing 100080, china 2. cas Key Laboratory of Colloid and Interface Science, institute of chemistry, Chinese Academy of Sciences, Beijing 100080, china 1. State Key Laboratory of Polymer Physics and chemistry Joint Laboratory of Polymer Science and Materials Institute of Chemistry Chinese Academy of Sciences 100080 Beijing China 2. cas Key Laboratory of Colloid and Interface Science Institute of Chemistry Chinese Academy of Sciences 100080 Beijing China

Diblock copolymer of PMMA291-b-PEO114 and triblock copolymer of PMMA120-b- PEO227-b-PMMA120 were synthesized and their interfacial properties at the air-water interface were investigated, where both blocks of polyethylene oxide (PEO) and poly(methyl methacrylate) (PMMA) are surface active but the former is soluble in water while the latter is not. Both the block copolymers could form monolayers with two obvious transition regions. The first transition point is around 10 mN/m, which could be assigned to the pancake-brush change of the PEO chains. The other is around 18 mN/m, which could be ascribed to the condensed packing of PMMA. The surface morphological changes during the compression of the Langmuir monolayers are inves-tigated by using the AFM and SEM methods for the films deposited at different surface pressure or molecular areas. At a lower surface pressure, a typical morphology of PEO-con- taining lipopolymers is observed. Upon compression, sphere-dominant morphologies were observed. While the diblock copolymer is easy to folding, the triblock copolymer is in favor of formation of circular domains through vesiculation.

关键词： PMMA-PEO, block copolymers, monolayer, Langmuir-Blodgett films, AFM.

Crystal Structure of a Novel Phosphorane (C_(30H27N3O12P-4) with Three P-P Bonds

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural chemistry 2000年第4期19卷 275-280页

作者： WANG Wen Hu ② WENG Lin Hong LIU Lun Zu (State Key Laboratory of Elemento organic chemistry, institute of Elemento organic chemistry, Nankai University, Tianjin 300071, china) 南开大学元素有机化学国家重点实验室天津 30 0 0 71

The first phosphorane 3, C 30H 27N 3O 12P 4, M r =745.43, bearing three P-P bonds, was synthesized and its crystal structure was determined by X ray diffraction method. The crystal data are as follows: colorless crystals, orthorhombic, space group P2 12 12 1, a=9.4387(1), b=18.424(2), c=19.358(2) , V=3366.57(7)  3, D c =1.471Mg/m 3, λ (Mo Kα )=0.71073 , μ (Mo Kα )=0.291mm -1, F(000)=1536, Z =4. The structure was refined to R =0.0598 and wR(F 2 )=0.0758 for 5946 observed reflections [ I>2σ(I )]. The geometry of the P(4) atom is pyramidal, whereas the coordination geometry around the P(1), P(2) and P(3) atoms is a strongly distorted trigonal bipyramid.

关键词： phosphorane P-P bond pyramid trigonal bipyramid