bluuebunny/crossref_metadata_2025 huggingface dataset:
ChemInform Abstract: A pH‐Responsive Fluorescence Probe and Photosensitiser Based on a Tetraamino Silicon(IV) Phthalocyanine.
Authors: Jiang Xiong‐Jie , Lo Pui‐Chi , Yeung Sin‐Lui , Fong Wing‐Ping , Ng Dennis K. P.
Published: September 2010

The interesting properties of title compound suggest that (III) can serve as a tumor‐selective fluorescence probe and photosensitizer for photodynamic therapy.
ChemInform Abstract: Synthesis, Structures, and Reactivity of Kinetically Stabilized Anthryldiphosphene Derivatives.
Authors: Tsurusaki Akihiro , Nagahora Noriyoshi , Sasamori Takahiro , Matsuda Kazunari , Kanemitsu Yoshihiko , Watanabe Yasuaki , Hosoi Yoshinobu , Furukawa Yukio , Tokitoh Norihiro
Published: September 2010

The first stable anthryldiphosphenes [cf.
ChemInform Abstract: Versatile Synthesis of Blue Luminescent Siloles and Germoles and Hydrogen‐Bond‐Assisted Color Alteration.
Authors: Yabusaki Yusuke , Ohshima Norikazu , Kondo Hitoshi , Kusamoto Tetsuro , Yamanoi Yoshinori , Nishihara Hiroshi
Published: September 2010

A variety of dibenzosiloles and ‐germoles as well as dithiophenosilole (VII) are prepared, better tolerating the functional groups as the methods applied so far.
ChemInform Abstract: An Unnatural Amino Acid That Mimics Phosphotyrosine.
Authors: Ge Jingyan , Wu Hao , Yao Shao Q.
Published: September 2010

A novel unnatural amino acid (IV) which mimics phosphotyrosine but possesses better cell permeability and hydrolytic stability is synthesized.
ChemInform Abstract: Synthesis of Marchantin C, a Novel Microtubule Inhibitor from Liverworts.
Authors: Speicher Andreas , Holz Judith
Published: September 2010

Starting with the Wittig reaction of functionalized aldehyde (I) with phosphonium salt (II), a straightforward approach to the title compound (VI) is detailed.
ChemInform Abstract: Structures and Properties of Metalloid Al and Ga Clusters Open Our Eyes to the Diversity and Complexity of Fundamental Chemical and Physical Processes During Formation and Dissolution of Metals
Authors: Schnoeckel Hansgeorg
Published: September 2010

Review: 271 refs.
ChemInform Abstract: A Review of the Beneficiation of Calcareous Phosphate Ores Using Organic Acid Leaching
Authors: Gharabaghi Mahdi , Irannajad Mehdi , Noaparast Mohammad
Published: September 2010

Review: 159 refs.
ChemInform Abstract: Macrolactones and Macrolactams
Authors: Sun Chang‐Liang , Li Bi‐Jie , Shi Zhang‐Jie
Published: September 2010

Review: 164 refs.
ChemInform Abstract: Hydrometallation‐Initiated Cyclization Reactions
Authors: Matsuda Isamu
Published: September 2010

Review: 193 refs.
ChemInform Abstract: Tetrathiafulvalene‐Based Conductors Containing Organometallic Components
Authors: Schlueter John A.
Published: September 2010

Review: 107 refs.
ChemInform Abstract: Enantioselective Synthesis of Sulfoxides (2000‐2009)
Authors: Wojaczynska Elzbieta , Wojaczynski Jacek
Published: September 2010

Review: 569 refs.
ChemInform Abstract: Glycosphingolipids of Echinoderms — The Chemical Diversity of Carbohydrate and Ceramide Structure
Authors: Miyamoto Tomofumi , Higuchi Ryuichi
Published: September 2010

Review: 80 refs.
ChemInform Abstract: Search for Medicinal Seeds from Marine Organisms
Authors: Arai Masayoshi , Kobayashi Motomasa
Published: September 2010

Review: 24 refs.
CO2 Capture for Fossil Fuel Fired Power Plants
Authors: Notz R. , Tönnies I. , Scheffknecht G. , Hasse H.
Published: September 2010

Es wird ein Überblick über den aktuellen Stand der Verfahrenstechnik zur Entwicklung von Kraftwerken mit drastisch reduziertem Ausstoß von Kohlendioxid gegeben. Die drei Haupttechnologien Post‐Combustion Capture, Pre‐Combustion Capture und Oxyfuel‐Technologie werden kurz vorgestellt und auf Basis neuerer Literatur miteinander verglichen. Wesentliche Vorteile der Post‐Combustion Capture sind die Möglichkeit der Nachrüstung bestehender Kraftwerke sowie die Technologiereife der Reaktivabsorptionsverfahren, die eine mittelfristige Umsetzung ermöglichen. Mit den beiden anderen Technologien ergeben sich nach dem derzeitigen Kenntnisstand voraussichtlich etwas geringere Wirkungsgradverluste des Kraftwerks, die Nachrüstbarkeit mit der Oxyfuel‐Technologie ist mit größerem Aufwand verbunden, die Pre‐Combustion Capture ist nicht nachrüstbar. Bei allen Technologien besteht weiterhin hoher Forschungsbedarf. Auf die Post‐Combustion Capture durch Absorption wird aufgrund des großen Potenzials für die mittelfristige Anwendung näher eingegangen.
Influence of the Nitrogen Dioxide Supply on Adsorption Filter Tests
Authors: Sager U. , Suhartiningsih  , Schmidt F.
Published: September 2010

Kraftfahrzeug‐Innenraumfilter scheiden gasförmige Schadstoffe, z. B. Stickstoffdioxid, durch Adsorption an Aktivkohle ab. Ihre Effizienz wird durch Vergleichstests gemäß DIN 71460, Teil 2, geprüft. Der Durchbruch des Testschadgases NO2 durch den Kfz‐Innenraumfilter wird erfasst. NO2 wird entweder direkt durch Dosierung von NO2 aus einer Vorratsflasche oder indirekt durch Oxidation von NO mit Luft oder Ozon bereitgestellt. Der Einfluss der Dosierungsart auf die Ergebnisse wird untersucht.
Synthesis and Crystal Structure of a New 2D Honeycomb‐like Cadmium (II) Complex with Tripodal Ligand
Authors: Sun Wei‐Yin , Fan Jian , Tang Wen‐Xia , Okamura Taka‐Aki , Ueyama Norikazu
Published: September 2010

A new cadmium (II) coordination polymer, [Cd(TTTMB)2]‐(SO4) · 21H2O, where TTTMB =1,3, 5‐tris (imidazol‐1‐yl‐methyl)‐2,4,6‐trimethylbenzene, was obtained by self‐assembly of tripodal ligand TTTMB with CdSO4·2.7H2O in acetonitrile, and characterized by X‐ray crystallography. The crystal data belongs to monoclinic space group Cc with cell parameters a = 1.16891(4) nm, b=2.06671(6) nm, c = 2.48185(7) nm, β = 97.8560(10)°, R = 0.0487, wR = 0.1211. The results of structure analysis indicate that each TTTMB ligand coordinates three metal atoms and in turn each Cd(II) atom with octahedral coordination geometry connects six nitrogen atoms of imidazole group from six different TTTMB ligands to produce a 2D honeycomb network structure. There are a lot of water molecules linked by hydrogen bonds and occupied the channels formed intra‐ and inter‐sheets.
Synthesis and Structure of Inclusion Complex of Cyclomaltoheptaose (β‐Cyclodextrin) with m‐ Aminophenol
Authors: Wang Jin‐Ling , Miao Fang‐Ming , Zhou Wei‐Hong , Ma Shi‐Kun
Published: September 2010

The supramolecular compound, β‐CD/m‐aminophenol [(C42H70O35)·(C6H7ON)·(H2O)7.5·CH3OH], was synthesized and characterized by X‐ray diffraction analysis. It crystallizes in monoclinic system, P21 space group, with a = 1.5122(4) nm, b=1.0335(4) nm, c=2.0915(3) nm, β=109.58(2)°, V = 3.0798(3) nm3 and final R = 0.0598. The system belongs to “shallow inclusion” which is rarely found. In this supramolecule, the guest is located over the narrow rim of the host There are so many hydrogen bonds that they build a dense hydrogen bond net. The hydrogen‐bond interactions are the main force to form the whole system and keep the stability.
Synthesis, Characterization and Crystal Structure of (2, 2′‐Bipyridine) (μ‐maleato) copper (II) Dihydrate
Authors: Li Zhen‐Yu , Xu Duan‐Jun , Shi Wei‐Liang , Chen De‐Yu , Wu Jing‐Yun , Chiang Michael Y.
Published: September 2010

The title polymeric complex [Cu(C4H2O4)(C10H8N2)]n·2nH2O was prepared and its crystal structure was determined by X‐ray diffraction methods. The crystal belongs to space group P21/c with cell dimensions of a = 1.0104(1), b = 1.9952(2), c = 0.7357(2) nm, β= 98.38(2)° and Z = 4. The complex forms zig‐zag chains along crystallographic axis c via Cu—O (carboxyl) bond in the apical direction. Each repeated unit consists of a square pyramidal Cu(II) centre with one maleate dianion and one 2,2′‐bipyridine forming a basal plane. Adjacent chains link to each other by H‐bonding between carboxyl groups and crystalline water. The distance of 0.3482 nm between parallel bipyridine rings shows a π‐π stacking interaction. The title complex was also characterized by IR, UV and ESR spectra.
Synthesis and Characterization of β‐Cyclodextrin Bonded Metal Porphyrins
Authors: Li Zao‐Ying , Li Cong , Li Jia‐Feng
Published: September 2010

Reactions of 5‐(p‐aminophenyl)‐10,15,20‐triphenyl porphyrin (1) with Ru3(CO)12 or M(OCOCH3)2 (M= Ni, Mn) afforded metalloporphyrins (4–6), respectively. 6‐Deoxy‐6‐iodo‐β‐cyclodextrin (2) and mono(6‐O‐trifluoromethanesulfonyl) permethylated β‐cyclodextrin (3) reacted with complexes 4–6 to give β‐cyclodextrin bonded metal porphyrins (7–9) and permethylated β‐cydodextrin bonded metal porphyrins (10–12) respectively. These new complexes were identified by MS, IR, UV‐visible and 1H NMR spectra, and elemental analysis.
Mechanism of the Deaquation of Aquopentaaminocobalt(III) Bromide
Authors: Ma Li‐Dun , Cheng Guang‐Hui , Wu Hong‐Xiang , Lin Han‐Yi , Shen Xiao‐Liang , Shi Gno‐Shun
Published: September 2010

There are two theories, SN1 and SN2, for the mechanism of the deaquation of aquopentaamincobalt (III) bromide (AAC‐B). Both of the theories are supported by some experimental and calculated data. But there are not any experiments to determine directly the structure of the intermediates at different reaction tune. In this paper the structures of the intermediates at different reaction time in deaquation‐anation of AACB were determined by extended X‐ray absorption fine structure (EXAFS) and the reaction process was studied by the combination of X‐ray powder diffraction and EXAFS. It was demonstrated that the deaquation‐anation of AACB obeys the SN2 theory.
One‐Pot Syntheses of 3,4‐Dihydropyrimidine‐2 (1H)‐thiones Catalyzed by La(OTf)3
Authors: Chen Rui‐Fang , Qian Chang‐Tao
Published: September 2010

A general and practical procedure for the syntheses of 3,4‐di‐hydropyrimidine‐2(1H)‐thiones by a one‐pot condensation of aldehyde, β‐ketoester or β‐diketone and thiourea using La‐(OTf)3 as the catalyst is described. Mild reaction conditions, excellent yields as well as the environmentally friendly character of La(OTf)3 make it an important alternative to the classic acid‐catalyzed Biginelli's reaction.
Amplified Immunoassay of Human IgG Using Real‐time Biomolecular Interaction Analysis (BIA) Technology
Authors: Pei Ren‐Jun , Cui Xiao‐Qiang , Yang Xiu‐Rong , Wang Er‐Kang
Published: September 2010

An automated biomolecular interaction analysis instrument (BI‐Acore) based on surface plasmon resonance (SPR) has been used to determine human immunoglobulin G (IgG) in real time. Polyclonal and‐human IgG antibody was covalently immobilized to a carboxymethyldextran‐modified gold film surface. The samples of human IgG prepared in HBS buffer were poured over the immobilized surface. The signal amplification antibody was applied to amplify the response signal. After each measurement, the surface was regenerated with 0.1 mol/L H3PO4. The assay was rapid, requiring only 30 min for antibody immobilization and 20 min for each subsequent process of immune binding, antibody amplification and regeneration. The antibody immobilized surface had good response to human IgG in the range of 0.12–60 nmol/L with a detection limit of 60 pmol/L. The same antibody immobilized surface could be used for more than 110 cycles of binding, amplification and regeneration. The results demonstrate that the sensitivity, specificity and reproducibility of amplified immunoassay using real‐time BIA technology are satisfactory.
Synthesis, Characterization and in vitro Antitumour Activity of the Di‐n‐butyltin(IV) Complexes of Some Arylhydroxamates
Authors: Wei Chun‐Ying , Yang Pin , Wang Lian‐Hong , Wang Li
Published: September 2010

Fourteen new di‐n‐butyltin(IV) complexes of hydroxamic acids of the formula Bu2SnL2HL = hydroxamic acids) were synthesized by the reaction of Bu2SnO and hydroxamic acids in dry toluene and ethanol media. The compounds were characterized by elemental analyses, molecular weight, IR and 1H NMR spectroscopy. The results indicate that n‐Bu2SnL2 have distorted trans‐octahedral structure. The antitumor activity in vitro against human A‐549 tumor cells and P388 leukemia was presented, and their structure‐activity relationship was discussed.
Syntheses and Anti‐inflammatory Action of (η‐C5H5)2Ti(Cin)2 and (η‐C5H5)2Ti(Tzea)2
Authors: Zeng Zheng‐Zhi
Published: September 2010

Two new complexes (Cp)2Ti (Cin)2 and (Cp)2Ti (Tzea)2 (Cp= Cyclopentadienyl η5‐C5H5) have been synthesized in THF by the reaction of HCin (Cincofen, 2‐phenylquinoline‐4‐carboxylic add) or HTzea (5‐phenyltetrazolyl‐2‐ethanoic acid) with (Cp)2TiCl2, and characterized by elemental analyses, IR, 1H NMR and 13C NMR, UV spectra, molar conductivity, TGDTA. In the complexes the carboxyl groups are coordinated to Ti(IV) in a monodentate manner. The inhibitory actions of the complexes on mice ear tumefaction caused by croton oil and the rat foot granulation growth produced by cotton wool are higher than those of the corresponding ligands HCin, HTzea and [(Cp)2TiCl2], while their toxicities are lower than those of the free ligands.
Theoretical Study on the Kinetics of Electron Transfer for Bond‐breaking Reaction
Authors: Xing Yu‐Mei , Zhou Zheng‐Yu , Gao Hong‐Wei
Published: September 2010

To test the theory of dissociative electron transfer, a simple model describing the kinetics of electron transfer bond‐breaking reactions was used. The Hamiltonian of the system was given. The homogeneous and heterogeneous kinetic data fit reasonably well with an activation‐driving force relationship derived from the Marcus quadratic theory. In the heterogeneous case, there is a good agreement between the theoretical calculation and the experimental result, while in the homogeneous case, a good agreement is only observed for the tertiary halides. This is due to the stability of tertiary radical resulting from the sterical effect.
Extraction Kinetics of Rare Earth Elements with sec‐Octylphenoxy Acetic Acid
Authors: Yue Shan‐Tang , Liao Wu‐Ping , Li De‐Qian , Su Qiang
Published: September 2010

The kinetics of RE (La, Gd, Er, Yb and Y) extraction with sec‐octylphenoxy acetic acid was investigated using a constant interfacial area cell with laminar flow at 303 K. The natures of the extracted complexes have some effect on the extraction rate which is controlled by the reaction rate of M(III) and extractant molecules at two‐phase interface for Er(III), Yb(III) and Y(III), by a mixed chemical reaction‐diffusion for Gd (III) and a diffusion for La(III). The extractant molecules tend to adsorb at the interface. So an interfacial extraction reaction model was derived.
Synthesis, Structure and Noncovalent Interactions of Palladium(II) Complexes with N‐Benzoyl‐β‐phenylalaninate Dianion and Aromatic Diimine
Authors: Chen Yao‐Feng , Gong Yu‐Qiu , Zhang Hua‐Song
Published: September 2010

Two palladium(II) complexes, [Pd(bipy)(BzPhe‐N,O)] and [Pd(phen)(BzPhe‐N,O)]·4H2O were synthesized by reactions between Pd(bipy)Cl2 and BzPheH2 (N‐benzoyl‐β‐phenylalanine), Pd(phen) Cl2 and BzPheH2 in water at pH‐9, with their structures determined by X‐ray diffraction analysis. The Pd atom is coordinated by two nitrogen atoms of bipy (or phen), the deprotonated amido type nitrogen atom and one of the carboxylic oxygens of BzPhe (BzPhe = N‐benzoyl‐β‐phenylalaninate dianion). In the complex [Pd(phen) (BzFne‐N,O)] · 4H2O, the side chain of phenylalanine is located above and approximately parallels to the coordination plane. Both the aromatic‐aromatic stacking interaction between the phenyl ring of phenylalanine and phen, and the metal ion‐aromatic interaction between the phenyl ring of phenylalanine and Pd(II) were observed. [Pd(bipy)(BzPhe‐N,O)] has the phenylalanyl side chain oriented outwards from the coordination plane, which is mainly due to the interaction between the carbonyl oxygen atom of the amido group and the phenyl ring of phenylalanine. The reason for the different orientation of phenylalanyl side chain in the complexes was suggested.
Oxygen‐evolving Activity in Photosystem II Core Complex of Photosynthetic Membrane in the Presence of Native Lipid
Authors: Yang Zhen‐Le , Wang Ze‐Neng , Li Liang‐Bi , Kuang Ting‐Yun
Published: September 2010

The techniques of oxygen electrode polarography and Fourier transform infrared (FT‐IR) spectroscopy were employed to explore the involvement of digalactosyl diacylglycerol (DGDG) in functional and structural roles in the photosystem II core complex (PSIICC). It was shown that DGDG exhibited the ability to stimulate the oxygen evolution in PSIICC, which was accompanied by the changes in the structures of PSIICC proteins. The results revealed that there existed hydrogen‐bonding interactions between DGDG molecules and PSIICC proteins. It is most likely that the sites of PSIICC interaction with DGDG are in the extrinsic protein of 33 kDa.
New Chiral Ligand N‐Toluenesulfonyl‐2,2′‐dimethoxy‐6, 6′‐di‐aminobiphenyl for Catalytic Asymmetric Transfer Hydrogenation of Ketones
Authors: Chen Yi‐Xin , Li Yue‐Ming , Lam Kim‐Hung , Sun‐Chi Albert Chan
Published: September 2010

A new chiral ligand N‐p‐toluenesulfonyl‐2,2′‐dimethoxy‐6,6′‐diaminobiphenyl (Ts‐DMBDPPA) was prepared from 2,2′‐dimethoxy‐6,6′‐diaminobiphenyl via N‐tosylation. Its Ru(II) complex was effective catalysts for catalytic asymmetric transfer hydrogenation of aromatic ketones (with ee's up to 69.3%).
Influences of Brönsted Acidic Sites in H[Al]ZSM‐5 on Polarization and Electronegativity of Ethene Studied by Molecular Dynamics
Authors: Fan Jian‐Fen , Xiao He‐Ming , van De Graaf B. , Wang Qiu‐Xia , Njo S. L. , Xia Qi‐Ying
Published: September 2010

Molecular dynamics simulation has been performed for studying the polarization and electronegativity of ethene molecules near Brönsted acidic sites in H[Al] ZSM‐5. The result shows that the molecules are polarized most at the edges of intersections and least at the segments of channels. On the contrary, the highest global molecular electronegativity is found at the centers of channel segments. Al substitution slightly increases the molecular dipole moment, but hardly affects the molecular electronegativity. Brönsted acidic proton decreases the dipole moment of guest molecule, but increases the molecular electronegativity.
One‐dimensional Anion‐chain Containing [Mo2O6(pic)2]2‐ Unit Connected by Unclassical Hydrogen Bond
Authors: Liang Hong , Chen Xiong‐Bin , Chen Zhen‐Feng , Hu Rui‐Xiang , Yu Kai‐Bei
Published: September 2010

The reaction of picolinic acid (Hpic) and (n‐Bu4N)4[Mo8O26] in the presence of CH3CN gave a supramolecular compound (n‐Bu4N)2[Mo2O6(pic)2] (1), and its structure was characterized by elemental analysis, IR spectra and single crystal X‐ray diffraction analysis. The single crystal X‐ray diffraction study shows that the crystal is in monoclinic crystal system, P21/c space group with cell parameters a =0.9941(2), b = 1.3719(2), c = 1.8824(2) nm, β = 100.840(10)°, Mr = 508.50, V = 2.5214(9) nm3, F(000)=1072. Compound 1 is a dimer through two μ2‐O bridging to two MoO3(pic)− unit, then connected one‐dimensional anion‐chain by unclassical hydrogen bonding, and the anion‐chain across the channels formed via (n‐Bu4N)+ cations. By means of unclassical hydrogen bonding, the anion‐chain and cation‐channels assemble into three‐dimensional supramolecular networks.
CoCl2·6H2O or LaCl3·7H2O Catalyzed Biginelli Reaction. One‐Pot Synthesis of 3,4‐Dihydropyrimidin‐2(1H)‐ones
Authors: Lu Jun , Bai Yin‐Juan , Guo Yan‐Hong , Wang Zhen‐Jun , Ma Huai‐Rang
Published: September 2010

An efficient synthesis of 3,4‐dihydropyrimidinones from aldehyde, β‐keto ester and urea in ethanol using cobalt chloride hexahydrate or lanthanum chloride heptahydrate as a catalyst was described. Compared to the classical Biginelli reaction, this new method consistently has the advantage of good yields (56%‐99%) as well as short reaction time (4–5 h).
Dramatic Solvent Effect in the Reduction of 2,3‐Allenoic Acid Esters. A Simple Synthesis of 2,3‐Allenols from 2,3‐Allenoates
Authors: Yin Shao‐Hu , Ma Sheng‐Ming , Jiao Ning , Tao Feng‐Gang
Published: September 2010

2,3‐Allenols were prepared conveniently from the reduction reaction of 2, 3‐allenoates with DIBAL‐H (Diisobutylaluminum hydride) in toluene. A dramatic solvent effect was observed for this reaction.
Stable Tetrahedral Aluminum Sites in Hexagonal Mesoporous Aluminosilicates
Authors: Han Yu , Yu Yi , Xu Xian‐Zhu , Xiao Feng‐Shou , Liu Xian‐Chun , Han Xiu‐Wen , Bao Xin‐He
Published: September 2010

A unique templating approach for the synthesis of hexagonal mesoporous aluminosilicates via self‐assembly of pre‐formed aluminosilicate nanoclusters with the templating micella formed by cetyltrimethylammonium bromide (CTAB) is described. The obtained materials of MAS‐5 are hydrothermally stable, which is shown by X‐ray diffraction (XRD) analysis. Furthermore, as characterized by NMR technique, MAS‐5 has stable tetrahedral aluminum sites that is the major contributions to the acidity of aluminosilicate molecular sieve, and on non‐framework aluminium species in the samples was observed.
Microcalorimetric Study of the Biological Effects of Zn2+ on Bacillus thuringiensis Growth
Authors: Yao Jun , Liu Yi , Gao Zhen‐Ting , Liu Peng , Sun Ming , Zou Xue , Qu Song‐Sheng , Yu Zi‐Niu
Published: September 2010

A microcalorimetric technique was used to investigate the influence of Zn2+ on the growth metabolism of Bacillus thuringiensis. LKB‐2277 Bioactivity Monitor was employed to obtain the power‐time curves, from which the maximum peak‐heat output power (Pmax) in the log phase, the growth rate constants (k), the inhibitory ratios (I), the generational time (tG) and the total heat effect (Qtotal) in 23 h for the growth metabolism of Bacillus thuringiensis at 28 °C can be evaluated. The results indicate that the concentration of Zn2+ affects its growth obviously. Low concentration (0–50 μg/mL) of Zn2+ promotes the growth of Bacillus thuringiensis while high concentration (50–500 μg/mL) of Zn2+ inhibits its growth. When the concentration reached up to 600 μg/mL, it can not grow at all.
Preparation of 6,6′‐Bisperfluoroalkylated BINOLs and Their Application in Asymmetric Alkylation of Benzaldehyde
Authors: Yin Yue‐Yan , Zhao Gang , Yang Gao‐Sheng , Yin Wei‐Xing
Published: September 2010

6,6′‐Bis (1H, 1H, 2H, 2H‐perfluorooctyl)‐BINOL and 6,6′‐bis (1H, 1H, 2H, 2H‐perfluorooctyl)‐BINOL were synthesized through Suzuki coupling reaction and used in fluorous biphase asymmetric alkylation of benzaldehyde. Good enantioselectivity was obtained and the catalysts could be recovered by liquid‐liquid extraction.
New Chiral N, 5‐Ligands with Thiophenyl at Benzylic Position. Palladium (II)‐catalyzed Enantioselective Allylic Alkylation
Authors: Wu Hao , Wu Xun‐Wei , Hou Xue‐Long , Dai Li‐Xin , Wang Quan‐Rui
Published: September 2010

New chiral N, S‐ligands with oxazoline and thiophenyl substituents at benzene ring and benzylic position have been prepared and applied in palladium‐catalyzed asymmetric allylic alkylation reaction to provide the product with high yield and entantioselectivity (82%–93% ee).
Syntheses and Crystal Structures of Three Palladium (II) Complexes with Isonitrosobenzoylacetoneimine Ligand
Authors: Feng Yun‐Long , Liu Shi‐Xiong
Published: September 2010

Three palladium (II) complexes with the isonitrosobenzoylacetoneimine (HIBI) ligand, Pd (p‐CH3C6H4IBI)2 (1), Pd (C6H5IBI)2 (2) and Pd2Cl2 (C6H5CH2IBI)2 · CHCl3 (3), were prepared and characterized by IR, Raman and X‐ray diffraction studies. The geometries around the palladium atoms in the complexes 1 and 2 are distorted trans‐PdN4 square planes, and the Schiff base ligands RIBI− are coordinated through their oximo‐nitrogen atoms and imino‐nitrogen atoms. The week Pd…HC agostic interactions [Pd…H = 0.2764 nm] complete the hexacoordinate environment around palladium in the complex 1. The octahedral deformation of the classical square planar environment of the Pd atom is due to the week Pd…O (1b) interactions [PdO (1b) = 0.3157 (9) nm] in the complex 2. The complex 3 is a first example of binuclear complex with isonitrosoketoimine ligands, in which one of oximo groups is coordinated through oximo‐nitrogen and oximo‐oxygen atoms.
Preparation, Structural Characterization and Luminescent Property of Binuclear Silver (I) Complex Formed by Benzotriazole and 1‐Hydroxymethyl Benzotriazole
Authors: Liu Qing‐Xiang , Xu Feng‐Bo , Li Qing‐Shan , Zeng Xian‐Shun , Leng Xue‐Bing , Zhang Zheng‐Zhi
Published: September 2010

Dinuclear silver (I) six‐membered ring complex [Ag2 (bta)2 ‐(hmbta)2] (ClO4)2 (3) has been synthesized by the reaction of benzotriazole (bta) (1) and 1‐hydroxymethyl benzotriazole (hmbta) (2) with Ag (CH3CN)4ClO4. The structures of compound 2 and Complex 3 have been studied by single crystal X‐ray diffraction analysis. The change of luminescent intensity of 1, 2 and 3 was reported. Compound 2 crystallizes in the monoclinic system with space group P2 (1)/c, a = 0.7655 (10) nm, b = 1.0126 (14) nm, c =0.9502 (13) nm, β = 95.07 (2)°, V = 0.7337 (17) nm3 and Z = 4. Complex 3 crystallizes in the triclinic system with space group P1, a = 0.73611 (18) nm, b = 0.9152 (2) nm, c = 1.2277 (3) nm, β = 87.170 (5)°, V = 0.8221 (3) nm3 and Z = 1. The main structural feature of complex 3 is a symmetric dinuclear six‐membered ring formed by two silver (I) atoms and four N‐atoms from two benzotriazoles. The second structural feature of complex 3 is the τ‐τ stacking interaction between two adjacent molecular planes, which forms the two‐dimentional layer structure. Besides, compared with 2, the luminescent intensity of complex 3 shows a remarkable enhancement.
A Novel Asymmetric ent‐Kauranoid Dimer from Isodon enanderianus
Authors: Na Zhi , Li Sheng‐Hong , Xiang Wei , Zhao Ai‐Hua , Li Chao‐Ming , Sun Han‐Dong
Published: September 2010

Further investigation on the aerial parts of Isodon enanderianus afforded a novel asymmetric ent‐kauranoid dimer, enanderinanin J (1). The structure of the dimer was elucidated by means of spectroscopic methods (including 2D NMR techniques). Enanderinanin J was a dimer of xerophilusin A and probably formed by [4 + 2] cycloaddition.
A General Two‐Step Procedure for the N‐Alkylation of Selenoamides
Authors: Zhao Hua‐Rong , Yu Qing‐Sen
Published: September 2010

Selenoamides are prepared via N‐alkylated in a two‐step procedure: Benzotriazole, aldehyde and primary selenoamide reacted together to yield an adduct which was then reduced to the N‐substituted selenoamide by NaBH4.
Studies on Hydroiodination and Deconjugation of 5‐Aryloxy‐(thiophenyl) −3‐pentyn‐2‐one
Authors: Liu Li‐Jun , Luo Fen‐Tair
Published: September 2010

One‐pot hydroiodination and deconjugation of 5‐aryloxy (or thiophenyl) −3‐pentyn‐2‐one with a reagent system of sodium iodide/trimethylsilyl chloride/water in acetonitrile at 25 °C have been described. The plausible mechanism was discussed. The reaction provided a simple and useful method for the preparation of (Z) ‐β‐substituted β, γ‐enones and (Z) ‐β‐substituted α, β‐unsaturated ketones.
High‐Speed Analyzing PCR Products of M. tuberculosis Genome Stained by Ethidium Bromide on Microchip Gel Electrophoresis
Authors: Jin Qing‐Hui , Chen Ji‐Feng , Jing Feng‐Xiang , Zhao Jian‐Long , Xu Yuan‐Sen
Published: September 2010

The technique of microchip gel electrophoresis (MCGE) was used to analyze the polymerase chain reaction (PCR) products of M. tuberculosis Genome stained by ethidium bromide. The electrophoretic process was completed within 3–4 min and the results show that the technique of microchip electrophoresis is a high‐speed and high‐sensitivity analyzing method.
Effects of Template Contents on the Physicochemical Sorption Properties of Zr‐Incorporated Mesoporous Titania Materials
Authors: Zheng Jin‐Yu , Qiu Kun‐Yuan , Wei Yen
Published: September 2010

Zr‐Incorporated mesoporous titania materials were prepared via nonsurfactant templated sol‐gel process of zirconium (IV) butoxide (ZBT) and titanium (IV) butoxide (TOT) in the presence of urea molecules as template or pore forming agent. The effects of template contents on the pore parameters of the materials synthesized with fixed Zr incorporation contents were investigated by nitrogen adsorption‐desorption measurements, powder X‐ray diffraction (XRD) study and transmission electron microscopy (TEM). The changes of template contents play significant roles on the pore parameters at low incorporation content of Zr. The pore diameters display a dear increase tendency with the increase of template contents. When high Zr incorporation content is used, the template contents have less effect on the pore diameters that almost keep unchanged with the increase of template contents. All the materials possess type IV isotherms with H2 hysteresis loops suggesting the formation of mesophase. The materials with low Zr incorporation content have anatase structures; however, it can not be found in the materials with high Zr incorporation content. TEM images show that some accumulated inter‐particulate pores and well‐distributed worm‐like pores are present in the Zr‐incorporated materials.
Internal Reorganization Energy Contributed by Torsional Motion in Electron Transfer Reaction between Biphenyl and Biphenyl Anion Radical
Authors: Min Wei , Sun Lin
Published: September 2010

Concerning the theoretical estimation of internal reorganization energy contributed by the tortional motion between biphenyl and biphenyl anion radical, direct calculation of self‐exchange electron transfer reaction was investigated. With the introduction of a proper average bond length and angle parameters (bond Bp), a multiple step relaxation Nelson method was developed to deal with the torsional reorganization energy. Based on the above model, an estimation of pure torsional reorganization energy λt.p with an approximation of λt.1 was achieved. The results of 0.140 and 0.125 eV of torsional reorganization energy for a cross‐reaction at the levels of 4‐31G and HP/DZP, respectively, are in good agreement with the value of 0.13 eV obtained by Miller et al. from the rate measurements. This implies the efficiency and validity of our method to estimate the reorganization energy contributed by pure torsional motion of Bp.
Hyperspherical Harmonic Expansions of Potential 1/rjt of Molecular Systems
Authors: Wu Ai‐Ling , Liu Cheng‐Bu , Zhao Xian , Bian Xiu‐Fang
Published: September 2010

The expansion coefficient CD|L| of Coulomb potential 1/rjt of molecular systems in hyperspherical harmonics is derived in detail, and the explicit expression is given.
Theoretical Study on Electron Transfer Matrix Element in Oxidation of α ‐ Amino Carbon‐Centered Radical by O2
Authors: Liu Ji‐Feng , Zhu Quan , Li Xiang‐Yuan , Yang Sheng‐Yong
Published: September 2010

As a successive work of our previous paper,1 the electron transfer matrix element (Vrp) in the oxidation of the simplified model molecule of α‐amino carbon‐centered radical by O2 has been investigated with ab initio calculation at the level of UHF/6‐31 + + G*. Based on the optimized geometries of the reactant and the ion‐pair complex obtained previously, the reaction heat and the inner reorganization energy have been obtained by constructing the potential energy curves of reactant and product states considering the solvent effect with the conductor‐like screening model (COSMO). The solvent reorganization energy has been estimated using Lippert‐Mataga relationship. The calculated results show that the value of Vrp, is several times larger than that of RT, which means that the model reaction is an adiabatic one. Theoretical investigation indicates that the solvent effect on the direct electron transfer (ET) process of oxidation of α‐amino carbon‐centered radical by oxygen is remarkable.
Determination of Ascorbic Acid Using a New Oscillating Chemical System of Lactic Acid‐Acetone‐BrO3−‐Mn2+‐H2SO4
Authors: Yang Shu‐Tao , Lin Zhi‐Xin , Cai Ru‐Xiu , Gan Nan‐Qin
Published: September 2010

Analyte pulse perturbation (APP) technique was applied to the study of the perturbation of ascorbic add (AA) on the lactic add‐acetone‐BrO3−‐Mn2+‐H2SO4 oscillating reaction, and AA was determined using this new oscillating chemical system. Influence of experimental variables was investigated. The linear range lies between 5.0 × 10−7‐5.5 × 10−s mol/L, and the precision and throughput were quite good (2.43% as RSD, and 8–10 samples/h, respectively). This method was applied to the determination of real samples and the results were satisfactory. Some aspects of the potential mechanism of action of AA on the oscillating systems are discussed.
Detection of Tumor Necrosis Factor Gene by Piezoelectric Nucleic Acid Sensor
Authors: Hu Yi , Zhou Xtao‐Dong , Liu Li‐Jia , Hu Min , Pei Ren‐Jun , Hu Ji‐Ming
Published: September 2010

A piezoelectric nucleic acid sensor was constructed for detection of tumor necrosis factor gene. Two methods were employed for immobilization of nucleic add probe on gold electrode of piezoelectric crystal. The results show that polyethyleneimine adhesion and glutaraldehyde cross‐linking method has higher sensitivity, stability and selectivity than protein A method. The solid‐phase nucleic acid hybridization of oligo nucleotides and tumor necrosis factor target gene sequence were monitored using this sensor. Tumor necrosis factor gene sequence (580 bp) was detected by mis nucleic acid sensor for the first time.
Simultaneous Laser Thermal Lens Spectrometric Determination of Trace Platinum and Palladium in an Aqueous Solution
Authors: Zhang Xiao‐Ling , Yan Hong‐Tao
Published: September 2010

A selective and sensitive method for determination of platinum and palladium (II) in an aqueous solution simultaneously by laser thermal lens spectrometry, based on the complex reaction of 2‐(3,5‐dichlopyridylazo)‐5‐dimethylaminoamiline (3,5‐di‐O‐PADMA) with platinum and palladium, has been developed. It is shown that the palladium complex can be formed at room temperature, while the platinum complex can be only formed after being heated in a boiling water bath. By using this difference of reaction temperature and the characteristic of the complexes mentioned above, the method for simultaneous determination of platinum and palladium was established in an aqueous solution without a pre‐separation. The results show that the dynamic linear ranges of determination for platinum and palladium are 0.005–0.04 μg/mL and 0.005–0.25 μg/mL respectively, and that the detection limits are both 0.002 μg/mL. The method has been applied to the determination of platinum and palladium simultaneously in alloy and catalyst samples with satisfactory results.
Synthesis of New Spiropyrans With a Polyaromatic or Heteroaromatic Pendant and Their Photochromic Behaviors
Authors: Pang Mei‐Li , Nie Yun‐Tong , Wang Yong‐Mei , Meng Ji‐Ben , Wang Ji‐Tao
Published: September 2010

A series of spiropyrans with a polyaromatic or heteroaromatic pendant was synthesized conveniently. Their photochromic behaviors were investigated with the aid of absorption spectral measurements. The results indicated that the compounds with the same parent spiropyran but different aromatic pendant show significantly different photochromic properties. This may be due to the π‐π orbital interaction between the polyaromatic pendant and the open photomerocyanine form of spiropyran. The results obtained are very useful in the molecule design area.
Negative Feedback Effect of Microwave Irradiation in the Microwave‐assisted Hydrothermal Synthesis of Bi2S3 Nanorods
Authors: Tao Xiu‐Cheng , Shao Ming‐Wang
Published: September 2010

The microwave‐assisted hydrothermal synthesis of Bi2S3 nanorods was reported. The result showed that microwave irradiation can help to produce Bi2S3 nanorods in very short time. There is a negative feedback effect which increases the degree of crystallinity in the reaction.
Synthesis and Crystal Structure of a Novel Hydrogen‐Bonded Three‐Dimensional Polymer [Zn (1,4‐benzenedicarboxylate) ‐(pyridine)·H2O]n
Authors: Wang Rui‐Hu , Hong Mao‐Chun , Weng Jia‐Bao , Cao Rong , Luo Jun‐Hua
Published: September 2010

A zinc(II) complex [Zn(bdc)(py)·H2O]a (bdc=1,4‐benzenedicarboxylate, py=pyridine) has been prepared and characterized. Single crystal X‐ray diffraction analysis reveals that the complex crystallizes in the monoclinic space group P21/n with a = 0.84823(3), b = 0.91440(3), c = 1.65141(2) ran, β = 91.243(2)°, V= 1.28057(6) nm3, Z = 4. The coordination geometry at each Zn(II) center is a distorted tetrahedron. Two independent bdc ligands in a herringbone pattern link alternatively four‐coordinated Zn(II) centers into a one‐dimensional polymeric chain. Hydrogen bonds among coordinated water molecules and uncoordinated oxygen atoms of two independent bdc ligands from different polymeric chains extend one‐dimensional polymeric chains into a three‐dimensional structure.
A Versatile Approach for the Asymmetric Synthesis of 3‐Alkyl‐isoindolin‐1‐ones
Authors: Chen Ming‐De , He Ming‐Zhu , Huang Li‐Qiang , Ruan Yuan‐Ping , Huang Pei‐Qiang
Published: September 2010

A flexible approach to (R)‐3‐alkyl‐isoindolin‐1‐ones and (R)‐3‐aryl‐isoindolin‐l‐ones via a diastereoselective reductive‐alkylation is described. Present method is versatile in scope, allowing the easy introduction of various C‐3 substituents by Grignard addition to phthalimide derived from (R)‐phenylglycinol. 3‐Alkyl‐3‐hydroxy‐isoindolin‐1‐ones can also be obtained in the first step of the present method.
Multifunctional Molecular Material Combining Photocurrent Generation and Second‐Order Optical Nonlinearity in LB Monolayer Films†
Authors: Li Fu‐You , Huang Yan‐Yi , Huang Chun‐Hui , Jin Lin‐Pei , Zhao Xin‐Sheng , Liu Ting‐Ting
Published: September 2010

A novel amphiphilic stilbazolium dye, (E)‐N‐methyl‐4‐[2‐(4‐N‐methyl‐N‐hexadecylaminophenyl) ethenyl]‐2‐isoquinolinium iodide (MHIQ), was synthesized. The dye was successfully transferred onto ITO electrode or quartz by the Langmuir‐Blodgett (LB) technique. The second harmonic generation (SHG) and photocurrent generation properties of the LB film transferred under 35 mN/m of surface pressure were investigated. The broad absorption maximum of the LB monolayer of MHIQ at 434 nm is far away from the wavelength (532 nm) of resonant enhancement effect, and its second harmonic susceptibility x(2) is 167 pm/V, which means that the isoquinolinium is a good electron‐accepting group. The photocurrent generation experiment shows that the photocurrent generation properties are dependent on the experimental conditions including bias voltage, redox couples and light intensity. By a light irradiation at 440 nm, the photocurrent generation quantum yields of the dye LB monolayer are 0.50% in 0.5 mol/L KG electrolyte solution and 17.5% in 0.1 mol/L KI electrolyte solution with 0.01 mol/L I2, respectively, indicating that the dye MHIQ is a good photoelectric conversion material.
Kekulé‐based Valence Bond Model. I. The Ground‐state Properties of Conjugated 7ü‐Systems
Authors: Li Shu‐Hua , Ma Jing , Jiang Yuan‐Sheng
Published: September 2010

The Kekulé‐based valence bond (VB) method, in which the VB model is solved using covalent Kekulé structures as basis functions, is justified in the present work. This method is demonstrated to provide satisfactory descriptions for resonance energies and bond lengths of benzenoid hydrocarbons, being in good agreement with SCF‐MO and experimental results. In addition, an alternative way of discussing characters of localized substructures within a polycyclic benzenoid system is suggested based upon such simplified VB calculations. Finally, the symmetries of VB ground states for nonalternant conjugated systems are also illustrated to be obtainable through these calculations, presenting very useful information for understanding the chemical behaviors of some nonalternant conjugated molecules.
Kekulé‐based Valence Bond Model. II. Diels‐Alder Reactivity of Polycyclic Aromatic Hydrocarbons
Authors: Ma Jing , Li Shu‐Hua , Jiang Yuan‐Sheng
Published: September 2010

The Kekulé‐based valence bond (VB) method was employed to study the ground state properties of 52 polycyclic aromatic hydrocarbons. The reactivity indices defined upon our VB calculations were demonstrated to be capable of quantitatively interpreting the second order rate constants of the Diels‐Alder reactions. The qualitative trends of the reactivities of many homologous series can be also explained based on the local aromaticity index defined in this work.
Characterization and Dehydrogenation Activity of SBA‐15 and HMS Supported Chromia Catalysts†
Authors: Yue Hong‐Yong , Zheng Bo , Yue Ying‐Hong , Zhang Xue‐Zheng , Hua Wei‐Ming , Gao Zi
Published: September 2010

SBA‐15 and HMS supported chromia catalysts were prepared and characterized. Chromia is highly dispersed on the mesoporous supports when its loading is 7 wt%. The supported catalysts display high activity, selectivity and stability for dehydrogenation of ethylbenzene and propane. ESR measurement of the catalysts before and after reaction shows that the active species for dehydrogenation reaction might be Cr3+ species on the catalyst surface, and the activity of the catalyst is probably correlated with the dispersion of Cr3+ species.
Synthesis and Characterization of a Series of New Functional Poly(ferrocenylenesilanes) for Nonlinear Optics
Authors: Liu Yun‐Yang , Zhang Xuan , Tang Hong‐Ding , Wang Ting‐Juan , Qin Jin‐Gui , Liu Dao‐Yu , Li Shao‐Jnn , Ye Cheng
Published: September 2010

A series of new poly (ferrocenylenesilanes) containing carbazole as charge transporting agent and Dispersed Red 1 (DR‐1) as second‐order nonlinear optical (NLO) chromophore was synthesized. The resulting polymers represent the first example of NLO polymer with ferrocenyl groups in the backbone. This series of polymers was characterized with 1H NMR, LTV‐vis, IR spectroscopies, differential scanning calorimeter (DSC) and gel permeation chromatography (GPC). A preliminary measurement on NLO property of the polymers was carried out with in‐situ second‐harmonic generation (SHG) measurement.
Studies on the Intramolecular Inclusion Complexes of Functionalized Calix[4]arenes with CH3X (X = CN, NO2)
Authors: Zhou Zhi‐Xian , Shi Ya‐Lin , Du Chen‐Xia , Xing Yan‐Jun , Wu Yang‐Jie
Published: September 2010

Two functionalized calix[4]arenes in cone conformation L2–3 have been synthesized and their intramolecular inclusion complexes (1:1) with organic neutral molecules CH3CN and CH3NO2 have been prepared and characterized, respectively. The X‐ray crystallographic analysis shows that L2 in L2·CH3CN. C2H5OH has C4 symmestry and L3 in L3.CH3NO2 exhibits C2 symmestry. The CH‐π aromatic interactions between the CH group of the guest and the phenyl rings of the calix backbond have been proved to be able to stabilize the intramolecular inclusion complexes formed. The interaction is directional, but it is independent of the acidity of the guest. To gain information on CH‐s interactions, suitable geometrical parameters have been calculated from the crystal data of intramolecular inclusion complexes. The results show that L3.CH3NO2 with L3 in C2 symmestry can also be bound stably in the intramolecular inclusion complex, being consistent with the thermal analysis. The geometrical parameters and the results of the thermal analysis of L1.CH3CN and L1.CH3NO2 were also given and discussed.
Proline‐40 is Essential to Maintaining Cytochrome b5′ s Stability and Its Electron Transfer with Cytochrome c
Authors: Wang Zhi‐Qian , Wu Jian , Wang Yun‐Hua , Qian Wen , Xie Yi , Xia Zong‐Xiang , Huang Zhong‐Xian
Published: September 2010

In order to illustrate the roles played by Pro40 in the structure, properties and functions of Cytochrome b5, three mutated genes, P40V, P40Y, P40G were constructed in this work. Only the P40V gene was successfully expressed into holoprotein in E. coli JM83. According to the results of X‐ray crystallographic analysis and various kinds of spectroscopy studies, it is evident that substituting valine for Pro40 does not result in significant alterations in the protein′s overall structure; however, local conformational perturbations in the proximity of the heme do occur. The redox potential of the P40V mutant is 40 mV lower than that of the wild type protein. Its stability towards heat, urea, acid and ethanol were significantly decreased. The mutation leads to a decrease in the hydrophobicity of the heme pocket, which is probably the major factor contributing to the above changes. Binding constants and electron transfer rates between cytochrome bs and cytochrome c were determined using UV‐visible spectroscopy and stopped‐flow techniques for both the wild type and the mutant. The results showed that the substitution of Pro40 by valine does not influence the binding constant of cytochrome b5 to cytochrome c; however, the electron transfer rate between them decreased significantly. This indicates that proline‐40 is essential to maintaining cytochrome bss stability and its electron transfer with cytochrome c. These studies also provided a good example that property and functional changes of a protein do not necessarily require large overall structural alterations; in most cases, only perturbations on the local conformations are sufficient to induce significant changes in protein′s properties and functions.
Synthesis of Optically Active β ‐ Alkyl ‐ α ‐ methylene ‐ δ ‐ butyro ‐lactones from Enantioselective Biotransformation of Nitriles, an Unusual Inversion of Enantioselectivity†
Authors: Zhao Sheng‐Min , Wang Mei‐Xiang
Published: September 2010

A new approach to optically active β‐alkyl‐α‐methylene‐δ‐butyrolactone derivatives was reported from the Rhodococcus sp. AJ270‐catalyzed hydrolysis of appropriate nitriles. The inversion of enantioselectivity of the amidase has been observed when a methyl protection was introduced into the hydroxy group of the parent substrate.
Axially Dissymmetric Chiral (R)‐N, W‐Bis(2‐hydroxy‐3,5‐ditert‐butyl‐arylmethyl)‐1, 1′‐binaphthalene‐2,2′‐diamine as Chiral Ligands in the Reaction of Diethylzinc to Aldehydes†
Authors: Shi Min , Duan Wei‐Liang , Rong Guo‐Bin
Published: September 2010

Chiral ligand (A)‐N,N′‐Bis(2‐hydroxy‐3,5‐di‐tert‐butyl‐arylmethyl)‐1,1′‐binaphthalene‐2,2′‐diamine derived from the reduction of Schiff base (R)‐2,2′‐bis (3,5‐di‐tert‐butyl‐2‐hydroxybenzylideneamino)‐1, 1′‐binaphthyl with LiAlH4, is fairly effective in the asymmetric addition reaction of diethylzinc to aldehydes by which good yields (46%‐94%) of the corresponding sec‐alcohols can be obtained in moderate ee (51%‐79%) with R configuration for a variety of aldehydes.
A Convenient Synthesis of 2‐Aryl‐3‐per(poly) fluoroacylindoles
Authors: Liu Jin‐Tao , Liu He‐Jun
Published: September 2010

2‐Aryl‐3‐per(poly) fluoroacylindoles were synthesized in good yields by the 1,3‐dipolar cycloaddition reaction of C‐aryl‐N‐phenylnitrones with fluorine‐containing olefins and the subsequent rearrangement of the adducts. An ionic mechanism was proposed for the formation of the titled compounds.
Catalytic Cyclotrimerization of Arylnitriles Using the Novel Samarium (II) Complexes as Catalysts
Authors: Xu Fan , Zhu Xue‐Hua , Shen Qi , Lu Jun , Li Jiu‐Qin
Published: September 2010

Samarium(II) complexes or Samarium(II) complexes/n‐hexylamine systems were found to be efficient catalysts for cyclotrimerization of arylnitriles. A variety of nitrites can be converted into the corresponding substituted‐s‐triazines under mild conditions in good to high yields by using samarium (II) complexes/n‐hexylamine as catalysts. The same reaction catalyzed by samarium(II) complexes alone gives s‐triazines in moderate yields.
A Concise Approach to the Synthesis of L‐ and Z)‐Deoxyribose
Authors: Hu Shou‐Gang , Wu Yi‐Kang , Wu Yu‐Lin
Published: September 2010

D‐Deoxyribose, the basic structure unit of DNA, and its antipode L‐deoxyribose were concisely synthesized from easily available D‐ and L‐glyceralaldehydes using a known convenient diastereoselective propargylation as the key step.