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Acta Chimica Sinica 1975 Vol.33 Please wait a minute... ION-EXCHANGE MEMBRANE AS A MEANS FOR TREATING WASTE ACID IN STEEL WORKS WASTE ACID TREATMENT GROUP Acta Chimica Sinica    1975, 33 (1): 7-10.   Published: 03 June 2013 Abstract （362）      PDF （523KB）（439）       Knowledge map    During the Great Proletarian Cultural Revolution, a "three-in-one" combination research group was organized from the workers, which formed the main-force, cadres and technical staffs of Silicon-Steel Sheet Works, Metallurgical Designing Institute and a research institute, for the recovery of sulphuric acid from the waste acid liquor of the steel works.Through the employment of our 5-203 anion ezohange membrane by way of diffusion-dialysis, a fairly satisfactory resint was obtained with an economy of the material as well as an improv.ment of the environment. Related Articles | Metrics EXTRACTION OF NIOBIUM AND TANTALUM BY N-SUBSTITUTED AMIDES LI SHU-SHENG, YUEN CHENG-YIH Acta Chimica Sinica    1975, 33 (1): 11-22.   Published: 03 June 2013 Abstract （543）      PDF （784KB）（765）       Knowledge map    N-Substituted amides possess excellent properties for the separation of niobium and tantalum.This paper describes a study on the mechanism of the extraction of niobium and tantalum by a solution of N, N-di-sec-octylaoetamide (DOAA) or N-mono-sec-octylacetamide (MOAA) in xylene from the HF-H2SO4 system. Related Articles | Metrics STUDIES ON THE ACTIVE PRINCIPLES OF SHIAN-HO-TSAO Ⅰ. THE ISOLATION STRUCTURE AND SYNTHESIS OF AGRIMOL-C SHANGHAI INSTITUTE OF MATERIA MEDICA SHANGHAI No.14 PHARMACEUTICAL WORKS Acta Chimica Sinica    1975, 33 (1): 23-33.   Published: 03 June 2013 Abstract （573）      PDF （2827KB）（1243）       Knowledge map    Five aoylphlorogluoinol derivatives named agrimol-A,-B,-C,-D, and -E have been isolated from the medicinal plant, Shian-Ho-Tsao [Agrimonia pilosa Ledeb (Rosaceae)].The moleonlar formulae found by means of elementary analysis and mass spectra are shown as follows: agrimol-A, C37H46O12; agrimol-B, C37H48O12; agrimol-C, C36H44O12; agrimol-D, C35H42O12 and agrimol-E, C33H38O12 The structure of agrimol-C is proved to be tris-ψ-aspidinol nBnBnB (III) with the aid of UV, IR, NMR, MS spectral analyses, and through chemical identification of its alkali degradation products.The proposed structure of agrimol-C has been confirmed by chemical synthesis. Related Articles | Metrics Cited: Baidu(1) THE STRUCTURE OF CHUANLIANSU CHUNG CHI-CHANG, HSIE TSING-HIS, CHEN SHU-FENG, LIANG HSIAO-TIEN Acta Chimica Sinica    1975, 33 (1): 35-47.   Published: 03 June 2013 Abstract （997）      PDF （3023KB）（1338）       Knowledge map    Chuanliansu (Ⅰ),CaogasW v isolated from the bark of Melia toosendan S: et Z., is an active anthelmintic against ascaris.The NMR spectrum of chuanliansu (Ⅰ) showed three quarternary C-methyl groups and two acetoxyl groups.Acetylation of Ⅰ with acetic anhydride and pyridine under forcing conditions yielded acetylchuanliansu (Ⅱ),C30H44O14 with a molecular weight of 700 as shown by mass spectrometry. Related Articles | Metrics Cited: Baidu(48) THE STRUCTURES OF CUCURBITAClN Ⅱa AND Ⅱb FROM HEMSLEYA AMABILIS CHEN WEI-HSIN, NIEH SHUI-LIN, CHEN YU-CHUN, HSIA KE-MING Acta Chimica Sinica    1975, 33 (1): 49-56.   Published: 03 June 2013 Abstract （533）      PDF （2568KB）（1259）       Knowledge map    Two new tetracyclic triterpenes, cucurbitacins Ⅱa and Ⅱb,found to show significant antibacterial activity, were isolated from the root of Hemsleya amabilis Diels (Cucurbitaceae).Their structures were deduced from their chemical transformadons, IRNMR and mass spectroscopy,the stereochemistry of ring-A hydroxyl groups was confirmed by conversion of Ⅱa to a known compound (Ⅲ).Thus Ⅱa is the CaⅡ25- acetyl derivative of dihydrocucurbitacin F and Ⅱb, dihydrocucurbitacin F. Related Articles | Metrics STUDIES ON THE CONSTITUENTS OF HUA-ZHONG-WU-WEI-ZI (SCHISANDRA SPHENANTHERA REHD ET WILS)Ⅰ. THE ISOLATION AND STRUCTURE OF SCHISANTHERIN A. FANG SHENG-DIN, HUANG MEI-FEN, LIU JIA-SEN, OAO YAO-LIANG, HSU JEN-SHENG Acta Chimica Sinica    1975, 33 (1): 57-60.   Published: 03 June 2013 Abstract （559）      PDF （305KB）（858）       Knowledge map    A new lignan, named schisantherin A, has been isolated from the fruits of Hua-Zhong-Wu-Wei-Zi(Schisarndra sphenanthera Rehd et Wils) (Magnoliaceae).According to the pharmacological and preliminary clinical findings, the schisantherin A is one of the antihepatotoxic principle of this plant.It is a lignan unknown so far.The molecular formula of schisantherin A is found to be C30H32O9 by mass spectroscopit and elementary analyses.When treated with 10% potassium hydroxide in methanol, it was converted into the corresponding hydroxy compound, schisantherinol A (C23H28O8) and benzoic acid in high yields.By taking advantage of UV, IR,NMR and mess spectroscopy, the structures of the two compounds, schisantherin A and schisantherinol A, are shown to be Ⅰa and Ⅰb respectively.Finally, the structure including the positions of all of the functional groups and conformation of sohisantherin A is established by double resonance experiments and measurements of intramolecular nuclear Overhauser effects (NOE).The resints are shown in Ⅱ. Related Articles | Metrics EXTRACTION OF INORGANIC SPECIES THROUGH COMPLEX FORMATION Ⅲ. EXTRACTION OF ZIRCONIUM BY DIBUTYL PHOSPHORIC ACID KING TIEN-CHU, HSU KWANG-HSIEN Acta Chimica Sinica    1975, 33 (1): 61-70.   Published: 03 June 2013 Abstract （537）      PDF （629KB）（457）       Knowledge map    The equilibria for the extraction system Zr4+/HClO4-NaClO4 (u=4) /HDBP-CCl4 (10-5 to 10-1M) have been studied.In the range of concentrations studied,it has been found that Zr is extracted into the organic phase with the formation of both Zr(DBP)4 and Zr(DBP)4-(HDBP),while in the aqueous phase containing 1 to 4M HC104, Zr exists as Zr (DBP)2(4-i)+ with i=0, 1, 2, 3, 4.The formation constantion of these species have been determined as follows(25°) Related Articles | Metrics Cited: Baidu(3) STUDIES ON THE DERIVATIVES OF CAMPTOTHECIN PAN PEI-CHUAN, PAN SHUN-YING, TU YUAN-HUA, WANG SHAO-YING, OWEN TSUNG-YAO Acta Chimica Sinica    1975, 33 (1): 71-74.   Published: 03 June 2013 Abstract （548）      PDF （271KB）（679）       Knowledge map    In the present investigation,the syntheses of some 12-substituted derivatives of camptotheoin, namely, 12-vitro-(Ⅴ),12-amino-(Ⅵ), 12-hydroxy-(Ⅹ),12-methoxy-(Ⅺ),12-oyano-(Ⅻ), 12-carboxy-(ⅩⅢ),12-carbomethoxy-(ⅪⅤ) and 12-mercapto-(ⅩⅤ) oamptothecin were described.The position of the substituent was determined with the aid of NMR spectroscopy. Camptothecin (Ⅰ) was nitrated in sulfuric acid to give V, of which catalytic hydrogenation led to the formation of Ⅵ.Diazotization of Ⅵ, followed by suitable transformations gave the desired compounds (ⅦⅩⅤ).Preliminary,pharmacological tests revealed that VIII showed much stronger inhibition against L-615.Ⅹ and Ⅺ exhibited stronger inhibition against Ehrlioh ascites carcinoma than Ⅰ.Further pharmacological examination is in progress. Related Articles | Metrics Cited: Baidu(4) A STUDY ON THE DEOXYHARRINGTONINE AND ITS ANALOGUES LI SHU-WEN, DAI JIN-YUAN Acta Chimica Sinica    1975, 33 (1): 75-78.   Published: 03 June 2013 Abstract （474）      PDF （257KB）（604）       Knowledge map    Deoxyharringtonine (Ⅰ) isolated from Cephalotazzcs plant material is known as an alkaloid with significant inhibitory activity against P-388 leukemia.We now report the synthesis of deoxyharringtonine (Ⅰ) by condensation of a-ketoacid (Ⅳ) with cephalotaxine (Ⅴ) through a Reformatsky reaction.The analogues (Ⅱ,Ⅲ)of deoxyharringtonine (Ⅰ) have been synthesized by the same procedure. Related Articles | Metrics Cited: Baidu(5) THE DERIVATIVE OF THE TETRAFLUOROETHYLENE OLIGOMER AND ITS APPLICATION SHANGHAI INSTRUMENT-ELECTROPLATING FACTORY THE OLIGOMER GROUP OF SHANGHAI INSTITUTE OF ORGANIC CHEMISTRY, ACADEMIA SINICA Acta Chimica Sinica    1975, 33 (1): 79-84.   Published: 03 June 2013 Abstract （552）      PDF （434KB）（510）       Knowledge map    We have studied tho oligomerization of tetrafluoroethylone and its application, Oligomerization of tetrafluoroethylene catalyzed by fluoride ion produced an easily separable mixture of oligomers in 78% yield.The structures of the tetramers and pentamer were confirmed as Ⅰ and Ⅱ respectively.The sulphonate derivative of the pentamer (Ⅵ) has been used satisfactorily as a degreasing agent for non-cyanide electroplating on copper. Related Articles | Metrics Cited: Baidu(1) COMPREHENSIVE UTILIZATION OF THE DUST IN SMELTING MANGANESE-RICH DREGS COMPREHENSIVE UTILIZATION WORKSHOP, GRADUATE PRACTICE GROUP OF WORKER-PEASANT-SOLDIER STUDENTS AND TEACHERS OF RARE ELEMENT CHEMISTRY SPECIALITY Acta Chimica Sinica    1975, 33 (2): 91-100.   Published: 03 June 2013 Abstract （414）      PDF （699KB）（673）       Knowledge map    A hydrometallurgical process for recovering some valuable elements from the dust in smelting manganese-rioh dregs is proposed.The dust is first treated with sulfurio said,and then at appropriate pH,zino together with manganese is separated by precipitation and subsequently converted into the corresponding sulfate and carbonate.The micro elements,such as gallium,indium and thallium,present in the dust,are separated by means of solvent extractions.Experimental results indicate that ootanol-(2) and N,N-di-(1'-methylheptyl) aoetamide are effective extractants. Related Articles | Metrics ON THE RELATIONSHIP BETWEEN ELECTRONEGATIVITY AND SOME PARAMETERS OF ATOMIC STRUCTURE CHEN NIAN-YI, CHANG HSING-KUO Acta Chimica Sinica    1975, 33 (2): 101-112.   Published: 03 June 2013 Abstract （570）      PDF （733KB）（803）       Knowledge map    This paper deals with the physical and philosophical concepts of eleotronegativity.Some diagrammatic methods,using the ciharge-radius ratio and electronegativity as parameters,are described.It appears that the electronegativity scale,which often fails when used alone,can be applied to solve some practical problems successfully when it is used in combination with the charge-radius ratio.The relationship of electronegativity scale to the charge-radius ratio and some other parameters describing the radial distribution of inner electrons,such as R0cov and ρ(rcov),has been investigated.Some empirical equations are proposed,and the physical meaning of the relationship is discussed. Related Articles | Metrics Cited: Baidu(9) CATALYSIS BY COORDINATION ACTIVATION Ⅱ.VAPOR-PHASE CATALYTIC HYDRATION OF ACETYLENE WITH A TYPE OF ZINC-COMPOUND CATALYST AMOY GLACIAL ACETIc-AcID FACTORY, AMOY RUBBER PRODUCTS FACTORY, DEPARTMENT OF CHEMISTRY AMOY UNIVERSITY Acta Chimica Sinica    1975, 33 (2): 113-124.   Published: 03 June 2013 Abstract （465）      PDF （2850KB）（1431）       Knowledge map    A type of zinc-compound catalyst,suitable for industrial production of acetaldehyde from acetylene by vapor-phase catalytic hydration by means of fluidized-bed technology,has been investigated.The mechanisms of the catalytic reactions and the nature of the active-centers of the oatalyst have been discussed. Related Articles | Metrics TREND OF dπ-dπ BONDING BETWEEN TRANSITIONAL METAL AND METALLOID IRSHAD A. KHAN Acta Chimica Sinica    1975, 33 (2): 126-132.   Published: 03 June 2013 Abstract （582）      PDF （637KB）（744）       Knowledge map    The trend of dπ-dπ bond formation between a metal atom and a metalloid is determined by applying bond energies,ionization potentials,overlap integrals and the infra-red vibration bands of carbonyl frequencies in metalmetalloid compounds.The metals Mn,Fe,Co,Ni,Cr,Me and W and the metalloids Si,P and S are discussed. Related Articles | Metrics THE SYNTHESES OF INSECT JUVENILE HORMONE MIMICS FOR IMPROVING SILK PRODUCTION IN BOMBR YX MORI L. INSECT HORMONE GROUP Acta Chimica Sinica    1975, 33 (2): 133-138.   Published: 03 June 2013 Abstract （365）      PDF （436KB）（420）       Knowledge map    In order to meet the needs of the silkworm-growing programme in our country,we have synthesized two insect hormone mimics possessing high juvenile hormone activity to be used for improving silk yield.These compounds(Ⅵ,Ⅶ) were prepared from geraniol(Ⅷ) or linalool(Ⅸ).Treatment of Ⅷ or Ⅸ with phosphorus trihalide gave geranyl halide(Ⅹ).Alkaline catalysed condensation of X with p-ethyl phenol afforded the P-ethyl phenyl terpenoid ether(ⅩⅠ),whioh on alkoxymercuration in the appropriate alcohol followed by borohydride demercuration furnished the final product(Ⅵ) or(Ⅶ) respectively with the diethogy compound(Ⅷ) as a by-product.The biological activity of Ⅵ is superior in comparision with that of Ⅶ.The physical and chemical constants of the final products and related intermediates were recorded. Related Articles | Metrics SYNTHESES OF THE ORAL CONTRACEPTIVES NORGESTRIENONE AND dl-18-METHYL-NORGESTRIENONE STEROID HORMONE GROUP, SHANGHAI No.9 PHARMACEUTICAL WORKS Acta Chimica Sinica    1975, 33 (2): 139-147.   Published: 03 June 2013 Abstract （599）      PDF （646KB）（963）       Knowledge map    Norgestrienone(Ⅰa)was prepared by partial synthesis either from X through the following sequence of reactions:ⅩⅠ→Ⅸ→Ⅶa→Ⅳa→Ⅶa→Ⅷa→ⅩⅣa→Ⅰa,or directly from Ⅳa to ⅩⅣa by selective ethynylation.dl-18-Methyl-norgestrienone(Ⅰb)was prepared by total synthesis from Ⅷb according to the reaction sequence similar to that of norgestrienone,i.e.,Ⅸb→Ⅶb→Ⅳb,ⅩⅡb→ⅩⅢb→ⅩⅣb→Ⅰb.Furthermore,ⅩⅡb can be obtained directly from ⅠⅩb,by hydrogen ohloride treatment in absolute methanol. Related Articles | Metrics STUDIES ON THE STEROIDAL SAPOGENINS OF AGAVE PLANT Ⅰ.ISOLATION AND IDENTIFICATION OF STEROIDAL SAPOGENINS FROM LEAVES OF AGAVE AMERICANA L. CHEN YEN-YUNG, TSUNG PU-CHU, HUANG LIANG Acta Chimica Sinica    1975, 33 (2): 149-161.   Published: 03 June 2013 Abstract （705）      PDF （797KB）（948）       Knowledge map    Tigogenin,hecogenin,9-dehydrohecogenin,rockogenin,12-epirockogenin,gitogenin,chlorogenin and manogenin were isolated from leaves of Agave americana L.gathered from Kwangtung Province.Although 12-epirockogenin has been reported in the literature as the reduction product of hecogenin,yet it is the first time ever isolated directly from a plant.The NMR spectra of these sapogenins with the exception of gitogenin were also reported and discussed. Related Articles | Metrics Cited: Baidu(2)