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Chinese Journal of Organic Chemistry 1990 Vol.10 Please wait a minute... Original Articles Synthesis of fluorinated carbohydrates MA LINGTAI;DONG LINGJIAO Chin. J. Org. Chem.    1990, 10 (1): 1-7.   Published: 25 February 1990 Abstract （2180）      PDF （368KB）（952）       Knowledge map    A review with 26 refs. on the synthesis of fluorinated carbohydrates by selective fluorination. Related Articles | Metrics Original Articles Applications of alkenylalanes in organic synthesis LI CHAOJUN;LI JISHENG Chin. J. Org. Chem.    1990, 10 (1): 7-14.   Published: 25 February 1990 Abstract （1795）      PDF （412KB）（508）       Knowledge map    A review with 38 refs. on the application of alkenyl(dialkyl)alanes in organic synthesis. Related Articles | Metrics Original Articles The synthesis of fenestranes RONG GUOBIN Chin. J. Org. Chem.    1990, 10 (1): 15-25.   Published: 25 February 1990 Abstract （1692）      PDF （495KB）（754）       Knowledge map    A review with 28 refs. Related Articles | Metrics Original Articles Syntheses and properties of bisphenol A type poly-crown ethers LU GUOYUAN;JIANG QIN;HAN ZONGREN;TANG BIN;ZHANG WENBIN;WANG DE;HU HONGWEN Chin. J. Org. Chem.    1990, 10 (1): 26-30.   Published: 25 February 1990 Abstract （2168）      PDF （309KB）（662）       Knowledge map    Four new title compounds were prepared by the condensation of 3,5,3'-tetra(hydroxymethyl)bisphenol A with benzo-12-crown-4, benzo-15-crown-5, benzo-18-crown-6 and dibenzo-18-crown-6, resp. Their complexation properties for alkali metals and phase transfer catalytic properties were investigated. Related Articles | Metrics Original Articles Synthesis f 3,8-dihydroxy-2-ethoxymethyl-1-methoxyanthraquinone YU JURONG;CAI JUNCHAO;GAO YISHENG Chin. J. Org. Chem.    1990, 10 (1): 30-36.   Published: 25 February 1990 Abstract （2048）      PDF （560KB）（964）       Knowledge map    The title compound I and derivatives were prepared from 4-acetoxy-3-bromophthalide and dimethoxytoluene in 9 steps. I showed antitumor activity against leukemia P388 cell in vitro. The inhibitory rates were 85.7%, 58.7%, and 42.9% at 100, 10 and 1 mg/mL, resp. Related Articles | Metrics Original Articles Osmium tetroxide oxidation of cyclic allylic alcohols LIU ZHIYU;XU YIBIN;WU ZEMIN;LU LIHUANG;YANG JIYING Chin. J. Org. Chem.    1990, 10 (1): 38-40.   Published: 25 February 1990 Abstract （2713）      PDF （156KB）（677）       Knowledge map    Oxidation of cyclic allylic alcs. with osmium tetroxide was described. E.g., stirring alcohol I (Z = H, OH) with osmium tetroxide, and N-methylmorpholine N-oxide in pyridine at room temperature for 3 days gave 91% ketone I (Z = O). Related Articles | Metrics Original Articles Isolation and chemical structures of steroidal alkaloids from pachysandra axillaris franch QIU MINGPING;NIE RUILIN;LI ZHONGRONG;ZHOU JUN Chin. J. Org. Chem.    1990, 10 (1): 41-43.   Published: 25 February 1990 Abstract （2291）      PDF （174KB）（653）       Knowledge map    Steroidal alkaloids from P. axillaris collected in Yunnan, China are reported. By means of systematic isolation, 22 steroidal alkaloids were isolated in crystalline form from the 95% EtOH exts. of P. axillaris. The basic characteristics of these compounds are tabulated. Their chem. structures were elucidated by spectral and chem. means. All the compounds belong to steroidal alkaloids of pregnane type, 17 of which, i.e., iso-spiropachysine, spiropachysine B, pachyaximineS A-B, axillarines A-F, pachysamines G-H, pachysanaximine A, axillaridine A, pachyaxiosides A-B, and epi-pachysamine B, are natural products reported for the 1st time. Related Articles | Metrics Original Articles Sex pheromone of the sugarcane striped borer-identification of three components REN DEMING;YAN YUNHUA;KONG FANLEI;LI WEI;YU SHENGDI;LI JIAOLIANG;ZENG WANQIU Chin. J. Org. Chem.    1990, 10 (1): 47-49.   Published: 25 February 1990 Abstract （2236）      PDF （207KB）（637）       Knowledge map    By TLC, gas chromatog. (GC), micro-ozonolysis, and GC-mass spectrometry, (Z)-11-hexadecenyl acetate, (Z)-13-octadecenyl acetate, and (Z)-13-octadecenol were isolated and identified as the sex pheromone components of the sugarcane striped borer Chilo venosatus from the pheromone gland extract of virgin females. A 8:7:42 mixture of the above 3 resp. components showed potent male attracting activity on field tests. Related Articles | Metrics Original Articles Synthesis of water soluble quaternary ammonium pyridine prophyrins and their metal complexes WU XUANJIE;ZHOU XIANG;CHEN PENGPING Chin. J. Org. Chem.    1990, 10 (1): 50-54.   Published: 25 February 1990 Abstract （2226）      PDF （301KB）（764）       Knowledge map    I (R = CH2CN, CH2CH2CN, CH2CO2Et, CH2CO2Me, CHMeCO2Et) were prepared from tetrakis(4-pyridyl)porphyrin and XR (X = Cl or Br). CoL(ClO4)4(OAc) (H2L = I) and MLX4 (M = Cu, Ni, Zn; X = ClO4, Br, Cl) were prepared and characterized by IR, NMR and ESR (Cu complexes) spectra. Related Articles | Metrics Original Articles Solvent effects on the visible spectra of 1-(N-methyl-4-pyridino)-3-(N-methyl-4-pyridylene)-4-alkyl-5-oxocyclopent-1-ene cyanines FAN WEIQIANG;TAO WEIGUO Chin. J. Org. Chem.    1990, 10 (1): 54-58.   Published: 25 February 1990 Abstract （2100）      PDF （241KB）（600）       Knowledge map    The visible absorption max. (lmax) of the title compounds (I, Ph) and (II, Me) in 27 organic solvents were measured. Both I and II showed neg. solvatochromism and remarkable sensitivity to the polarity of solvent. A fairly good correlation between lmax and the solvent polarity scale (Z) and ET(30) values was established. The electron transfer energy ET(1) and ET(2), calculated from the lmax value in different solvents, showed good parallel relationship with Z and ET(30). Thus ET(1) and ET(2) could be used as a new solvent polarity scale. Related Articles | Metrics Original Articles Synthesis of polysubstituted pyrrolyl fatty acid LI BAO;ZHANG ZHENLI;LI LIANZHONG;ZHANG XIAOUMEI;ZHAO CHENGZHI Chin. J. Org. Chem.    1990, 10 (1): 58-61.   Published: 25 February 1990 Abstract （1865）      PDF （189KB）（580）       Knowledge map    Eight title acids were prepared from 1-(p-chlorophenyl)-3-acetyl-1,4-pentanedione and amino acids. Related Articles | Metrics Original Articles Studies on the 2-aryl-5-(5-phyenyl-2 H-tetrazole-2-methylene-1,3,4-oxadiazoles derivatives FENG XIAOMING;ZHANG ZIYI;MENG QIANXIANG;ZHENG GUOYU Chin. J. Org. Chem.    1990, 10 (1): 62-66.   Published: 25 February 1990 Abstract （2154）      PDF （281KB）（605）       Knowledge map    Cyclization of N-(5-phenyl-2-H-tetrazole-2-acetyl)-N-aroylhydrazine (I, Ar = 1-naphthyl, 4-NO2C6H4, 3-NO2C6H4, and 2-ClC6H4) catalyzed by POCl3 gave the title compounds as bactericides. Related Articles | Metrics Original Articles Cyclizations of 2,6-disubstituted acetophenone phenylhydrazones in the presence of polyphosphoric acid ZHANG ZHENG;QIU YUZHU;HANG CHAO;HU HONGWEN Chin. J. Org. Chem.    1990, 10 (1): 66-70.   Published: 25 February 1990 Abstract （2787）      PDF （271KB）（1218）       Knowledge map    The title reaction gave arylindoles and indazoles. Related Articles | Metrics Original Articles Synthesis of 2-hydroxy-4-(1'-methylheptyoxyl)benzalkanone oximes XIANG CAILI;HU WEN XIANG;YUAN CHENGYE Chin. J. Org. Chem.    1990, 10 (1): 70-73.   Published: 25 February 1990 Abstract （1845）      PDF （248KB）（659）       Knowledge map    A series of title compounds I (R = Pr, Bu, heptyl) was synthesized for structure-reactivity studies as ligands in metal extration Related Articles | Metrics Original Articles ESR study on the reaction system of carbon tetrahalide with strong bases CHEN SHIMING;GE MINGTAO;GAO SHIQIN;XU LINXIAO;TAO FENGGANG Chin. J. Org. Chem.    1990, 10 (1): 74-77.   Published: 25 February 1990 Abstract （2208）      PDF （253KB）（948）       Knowledge map    The spin trapping technique showed that the trihalomethyl radical was formed in the title reaction systems. A single electron transfer mechanism was suggested. Related Articles | Metrics Cited: Baidu(7) Original Articles Studies on the synthesis and catalytic activity of macroporus polystyrene-supported PEG KANG RUHONG;LI WEI;SHAN YING Chin. J. Org. Chem.    1990, 10 (1): 78-82.   Published: 25 February 1990 Abstract （2030）      PDF （980KB）（674）       Knowledge map    Six macroporous polystyrene-supported PEG catalysts were prepared These catalysts have higher catalytic activity than microporous polystyrene-supported catalysts in nucleophilic substitution reactions. The activity of the catalysts was highly affected by the degree of crosslinking of the polystyrene resin, the chain length of PEG supported on polystyrene resin, the dielec. constant of the solvents and the times of recycling of the catalysts. Related Articles | Metrics Cited: Baidu(4) Original Articles Uncatalyzed oscillation in the 2,7-diaminonaphthalene-KBrO~3-H~2SO~4 system LI HEXIN;FU CHUJIN Chin. J. Org. Chem.    1990, 10 (1): 82-86.   Published: 25 February 1990 Abstract （1901）      PDF （311KB）（603）       Knowledge map    A new uncatalyzed Belousov-Zhabotinskii oscillating reaction in the title system was described. The factors affecting the oscillations were investigated. The mechanism involves the displacement of the metal ion by the amine radical. The effects of the concns. of the reactants on the oscillations have been explained based on the mechanism. Related Articles | Metrics Original Articles Esterification catalyzed by stannous oxide CHEN MAO;YANG MAOLI;ZHANG FUQIANG;LI BAOSHENG Chin. J. Org. Chem.    1990, 10 (1): 86-89.   Published: 25 February 1990 Abstract （2628）      PDF （223KB）（946）       Knowledge map    Esters were prepared from esterification of butanol and pentanol with acetic acid, sebacic acid, citric acid, benzoic acid, salicylic acid and phthalic anhydride in the presence of SnO. The mechanism of the catalytic esterification by SnO was suggested and the advantage was discussed. Related Articles | Metrics Original Articles progress in the approaches to the synthesis of gibberellin PAN XINFU;ZHAO HE Chin. J. Org. Chem.    1990, 10 (2): 97-105.   Published: 25 April 1990 Abstract （2211）      PDF （387KB）（1118）       Knowledge map    A review with 15 refs. on the total and partial synthesis of gibberellins.a Related Articles | Metrics Original Articles Application of photo-[2+2] cycloaddition in organic synthesis WU BIQI;WU GUOSHENG Chin. J. Org. Chem.    1990, 10 (2): 106-116.   Published: 25 April 1990 Abstract （2034）      PDF （530KB）（1035）       Knowledge map    With special emphasis on synthetic applications, the light-induced intra- or intermol. [2 + 2] cycloaddn. of the double bond of alkenes, dienes or enones or alkenes are reviewed with 56 refs.t Related Articles | Metrics Original Articles A study on the synthesis and bioassay of sorbic acid LI ZHENGMING;WANG TIANSHENG;ZHANG ZUXIN;ZHANG DIANKUN;ME ENYUN;GAO ZHENHENG Chin. J. Org. Chem.    1990, 10 (2): 117-125.   Published: 25 April 1990 Abstract （2092）      PDF （441KB）（1333）       Knowledge map    All theor. possible isomers of 2,4-hexadienoic acid (sorbic acid) and their Et esters were synthesized stereoselectively with crotonaldehyde and propargyl alcohol The 2Z,4E and 2Z,4Z isomers showed better bioassay results than the com. available 2E,4E isomer. Related Articles | Metrics Original Articles The formation and structures of the methanol-adducts of phycoerythrobilin dimethylester YI GUOLIANG;JIANG LIJIN;MA JINSHI Chin. J. Org. Chem.    1990, 10 (2): 126-128.   Published: 25 April 1990 Abstract （2085）      PDF （166KB）（714）       Knowledge map    Methanolysis followed by esterification of phycobiliproteins of Porphyra yezoensis and Polysiphonia urceolata produced the Z- and E- isomers of 18'-hydro-18'-methoxy-phycoerythrobilin (I). Four other isomers of I were also detected by TLC. Related Articles | Metrics Original Articles Indirect electrooxidation of 11α-hydroxy-16,17α-epoxy-progestron CHEN QIRUI;PANG KAI Chin. J. Org. Chem.    1990, 10 (2): 129-134.   Published: 25 April 1990 Abstract （1915）      PDF （325KB）（623）       Knowledge map    Experimental results are described for the mediated electrooxidn. of 11a-hydroxy-16,17a-epoxyprogesterone to form 11-keto-16,17a-epoxyprogesterone. The organic substrate is chem. oxidized by Cr(VI) in a CH2Cl2/H2O (4 mol/L H2SO4) system at 24-26? the presence of a phase transfer agent (Bu4NHSO4) greatly accelerates the reaction. Spent solns. of Cr can be regenerated at a Pt anode in 4 mol/L H2SO4 media with Ag+ as a catalyst. The current efficiency was >70%, and the chem. yield was >95%. The mediated system may be recycled. A probable mechanism for this reaction is suggested. Related Articles | Metrics Original Articles Isolation and structure elucidation of the chemical constituents of south china sea sponge phakellia sp WU HOUMING;LUO QIUPING;LIU ZHUJIN Chin. J. Org. Chem.    1990, 10 (2): 135-138.   Published: 25 April 1990 Abstract （2195）      PDF （243KB）（577）       Knowledge map    The chem. constituents of South China Sea sponge Phakelli sp. were studied by means of chromatog. and spectroscopy. From the sponge, trigonelline, taurine, a yellow compound, hymenialdisine, and 3 3b-hydroxy-methyl-A-nor-5-steranes were identified. Related Articles | Metrics Original Articles Asymmetric reduction by Na2S2O4 of ketones in the presence of β -cyclodextrin HUANG WANJU;ZHANG DAODAO;WEN SHIYING;XU LIANGHENG Chin. J. Org. Chem.    1990, 10 (2): 139-141.   Published: 25 April 1990 Abstract （2157）      PDF （167KB）（896）       Knowledge map    The aromatic and aliphatic ketones were reduced to give chiral carbinols. Related Articles | Metrics Original Articles ^1^5N isotope shifted IR spectra and structure study of arylhydroxyoximes and their transition metal complexes NIE CHONGSHI;CHEN YAOHUAN;ZHOU CHENGMING;ZENG MINGYING;SHENG HUAIYU Chin. J. Org. Chem.    1990, 10 (2): 141-148.   Published: 25 April 1990 Abstract （2188）      PDF （389KB）（851）       Knowledge map    The IR spectra (75-4000) cm-1) of 5 arylhydroxyoximes and their transition metal complexes as well as their corresponding 1kN isotope analogs were measured. According to the 15N isotope shifted bands, the characteristic nC:N and n:N-O frequencies of the oximes and their metal complexes are assigned to a medium strong band in 1640~1610 cm-1 region and near 1000 cm-1 resp. In low frequency region, a weak band showing small 1kN isotope shift in 380~330 cm-1 is assigned to metal-ligand M-N, coordination bond stretching mode absorption for the complexes. Using 63Cu and 65Cu isotope shifts, a medium strong band in 270~220 cm-1 region was tentatively assigned to nM-O mode absorption. For HAP coordinated with different metals, the nOH and n-N-O frequencies of the complexes increase and slightly decrease resp. according to the sequence: Fe2+, Co2+, Cu2+, Ni2+. The sequence is in consistent with the radius of the metal ions and the reported relative mol. ion peak heights of their electroionization mass spectra. Related Articles | Metrics Original Articles Synthesis and structure of dinuclear cobalt complexes (RC2R'Co~2(CO)~6~-~n[P(OEt)~3]~n MENG QINGJIN;SUN SHOUHENG;YOU XIAOZENG Chin. J. Org. Chem.    1990, 10 (2): 146-158.   Published: 25 April 1990 Abstract （1915）      PDF （179KB）（788）       Knowledge map    Related Articles | Metrics Original Articles Acylative cleavage of ethers catalyzed by nickel chloride DING XIN;LIU GUOBIN Chin. J. Org. Chem.    1990, 10 (2): 149-152.   Published: 25 April 1990 Abstract （1980）      PDF （174KB）（548）       Knowledge map    A wide variety of ethers are cleaved with acetyl chloride or acetic anhydride in the presence of nickel chloride as catalyst, giving the corresponding esters in moderate to good yields. E.g., stirring Bu2O with AcCl and NiCl2 at room temperature for 3.5 h gave 74% BuOAc. Related Articles | Metrics Original Articles Synthesis of two squarylium compounds of bis-crown ethers CHEN YIZHAO;XIE MINGGUI;WU DEXIAN;JIANG NING;RAO XIAOBO;ZHANG JIANGUO;HONG ZHOU Chin. J. Org. Chem.    1990, 10 (2): 152-155.   Published: 25 April 1990 Abstract （1971）      PDF （212KB）（464）       Knowledge map    The synthesis of novel biscrown ethers of squarylium compounds, N,N-1,3-bis(4-aminobenzo-15-crown-5)cyclobutendiylium-2,4-diolate and N,N-1,3-bis(benzoaza-15-crown-5)cyclobutendiylium-2,4-diolate are described. The latter is elucidated by four circle x-ray diffraction on the single crystal method. Related Articles | Metrics Original Articles Studies on reactions of lateral metallation and alkylation of picolines ZHOU DUOXIU;ZENG XIANMOU;MA ZHAOLAN;GU YIJIAN;ZHANG XIUFENG;XIAN GUILIAN;GUO CHUNXIANG Chin. J. Org. Chem.    1990, 10 (2): 159-162.   Published: 25 April 1990 Abstract （2190）      PDF （214KB）（710）       Knowledge map    Picoline can be metalated by picoline radical anion sodium complex (CH3C5H4N-Na+) and the resulting picolysodium intermediate underwent alkylation subsequently with alkyl halide. It is a convenient method for synthesizing longer chain a-and g-alkyl pyridines from a-and g-picoline, resp. Related Articles | Metrics Original Articles A novel reaction for vicinal hydroxyacetoxylation of alkenes TAO FENGGANG;XU LINXIAO;HU JUN;MA SHIMING;XIE GAOYANG Chin. J. Org. Chem.    1990, 10 (2): 163-167.   Published: 25 April 1990 Abstract （2247）      PDF （303KB）（641）       Knowledge map    Alkenes were converted regioselectively into either the corresponding vicinal hydroxy acetates or vicinal diols in good yields by using sodium perborate-acetic anhydride as the oxidant. Sulfuric acid was used as a catalyst. Related Articles | Metrics Original Articles Research on the syntheses of substituted pyridazinone nucleosides ZHAO YUNQING;LIN CHENGJI;PEI WEN Chin. J. Org. Chem.    1990, 10 (2): 168-170.   Published: 25 April 1990 Abstract （1905）      PDF （182KB）（589）       Knowledge map    Title compounds e.g., I (R = H, Br) were prepared from pyridazinones II via coupling of silyl derivatives of II with 2,3,5-tribenzoyl-1-acetyl-b-ribofuranose. Related Articles | Metrics Cited: Baidu(2) Original Articles Stereochemistry of hydroboration of 2aβ3,4,6,7,8,8aβ,8bβ -octahydro--3α6,6,8bβtetramethyl-2H-naphtho[1,8-bc]furan LIU ZHIYU;CHU HUILAN;ZHOU XIAORUI Chin. J. Org. Chem.    1990, 10 (2): 171-174.   Published: 25 April 1990 Abstract （2003）      PDF （247KB）（599）       Knowledge map    Hydroboration of the title compound I gave two isomers in the ratio of 5.5:94.5. Related Articles | Metrics Original Articles Etherification of 1-hydroxy-6-trifluoromethyl-1-H-benzotriazole by williamson reaction YANG YAN;HUANG XIAOLING;XU HANSHENG;HUANG JIANHUA;JI JINGSHUN Chin. J. Org. Chem.    1990, 10 (2): 175-178.   Published: 25 April 1990 Abstract （2284）      PDF （214KB）（649）       Knowledge map    Eight new ethers were prepared in excellent yields by treating 1-Hydroxy-6-trifluoromethyl-1-H-benzotriazole with alkyl and aryl halides. Related Articles | Metrics Original Articles The preparation and reactions of W-fluorosulfonylfluoroalkyl grignard reagent CHEN QINGYUN;CHEN JIANGUO Chin. J. Org. Chem.    1990, 10 (2): 179-183.   Published: 25 April 1990 Abstract （2218）      PDF （335KB）（658）       Knowledge map    The metal-halogen exchange of w-fluorosulfonylperfluoroalkyl iodide with EtMgBr gives the corresponding perfluoroalkyl Gringard reagent. The fluorosulfonyl group is not vulnerable to the attack of EtMgBr under exchange reaction conditions. The perfluoroalkyl Grignard does not undergo cyclization during its formation and can react with various carboxylic esters to give w-fluorosulfonylperrfluoroalkyl ketones. Only 1,2-addn. products are obtained on treatment of the title reagent with a,b-unsatd. aldehydes and esters. Related Articles | Metrics Original Articles Microdetermination of tin in organotin compounds LIU HUIYING;YANG DAYU Chin. J. Org. Chem.    1990, 10 (2): 191-192.   Published: 25 April 1990 Abstract （2217）      PDF （152KB）（1171）       Knowledge map    A simple and rapid method about digestion of organotin compounds is presented. A 15 mL centrifugal tube was used in a sample digestor and a mixture of acids containing perchloric acid was used for digestion. Any one of the four titrants, Pb(NO3)2, Zn(OAc)2, CuSO4 or La(NO3)3, can be used to titrate the tin content with satisfactory accuracy. The absolute error of determination is within ?.3% and the time for treating a sample is about 30 min. Fe3+ and Hg2+ ions interfere. Related Articles | Metrics Cited: Baidu(27) Original Articles Allylic metal compounds in asymmetric synthesis HONG YAPING Chin. J. Org. Chem.    1990, 10 (3): 193-208.   Published: 25 June 1990 Abstract （1823）      PDF （624KB）（1166）       Knowledge map    The recent developments and applications of allylic metal compounds in asym. synthesis are reviewed with 46 refs., and the related mechanisms of the nucleophilic addns. to aldehydes are also described.g Related Articles | Metrics Original Articles Topological stereochemistry QIU WENYUAN;ZHANG LIJUAN Chin. J. Org. Chem.    1990, 10 (3): 209-216.   Published: 25 June 1990 Abstract （1865）      PDF （1400KB）（711）       Knowledge map    A review with 18 refs.e Related Articles | Metrics Original Articles A facile dialkylation of α-arylsulfonylacetates under solid-liquid phase transfer conditions LIU GUANGJIAN;ZHANG ZHENG;SUN YUPING;WANG YULIANG;CAI SONGCHUAN Chin. J. Org. Chem.    1990, 10 (3): 217-222.   Published: 25 June 1990 Abstract （1781）      PDF （393KB）（1022）       Knowledge map    a-Arylsulfonylacetates were treated with potassium carbonate under solid-liq. phase transfer conditions to generate the corresponding carbanions and then allowed to react in situ with alkyl, allylic, and benzylic halides to give the dialkylated products in good yields. E.g., arylsulfonylacetate I (R = 4-ClC6H4CH2) was prepared in 85% yields from I (R = H) and 4-ClC6H4CH2Cl. Related Articles | Metrics Original Articles Study on the thermal pyrolysis of perfluorosulfonyl fluoride resin XU BAOPEI;SHU JINGZHI;ZHANG LINCHANG;CHEN TONGFEN;DAI XINGYI;ZHAO MEICHENG;SUN JIAOHUA Chin. J. Org. Chem.    1990, 10 (3): 223-229.   Published: 25 June 1990 Abstract （2014）      PDF （346KB）（695）       Knowledge map    Tetrafluoroethylene-perfluoro(3,6-dioxa-4-methyl-7-octenesulfonyl fluoride) (I) copolymer and I homopolymer were studied by pyrolysis gas chromatog.-mass spectrometry. The pyrolysis products were identified and the pyrolysis mechanism was proposed. A relation existed between the amount of several main pyrolysis products and the copolymer compounds Related Articles | Metrics