bluuebunny/crossref_metadata_2025_split huggingface dataset:
Down-Regulation of the Tumor Suppressor Gene Retinoic Acid Receptor β2 through the Phosphoinositide 3-Kinase/Akt Signaling Pathway
Authors: Lefebvre Bruno , Brand Céline , Flajollet Sébastien , Lefebvre Philippe 
Published: April 2006

AbstractThe retinoic acid receptor β2 (RARβ2) is a potent, retinoid-inducible tumor suppressor gene, which is a critical molecular relay for retinoid actions in cells. Its down-regulation, or loss of expression, leads to resistance of cancer cells to retinoid treatment. Up to now, no primary mechanism underlying the repression of the RARβ2 gene expression, hence affecting cellular retinoid sensitivity, has been identified. Here, we demonstrate that the phosphoinositide 3-kinase/Akt signaling pathway affects cellular retinoid sensitivity, by regulating corepressor recruitment to the RARβ2 promoter. Through direct phosphorylation of the corepressor silencing mediator for retinoic and thyroid hormone receptors (SMRT), Akt stabilized RAR/SMRT interaction, leading to an increased tethering of SMRT to the RARβ2 promoter, decreased histone acetylation, down-regulation of the RARβ2 expression, and impaired cellular differentiation in response to retinoid. The phosphoinositide 3-kinase/Akt signaling pathway, an important modulator of cellular survival, has thus a direct impact on cellular retinoid sensitivity, and its deregulation may be the triggering event in retinoid resistance of cancer cells.
RAI-III and VI, Conformational Isomers of Antitumor Cyclic Hexapeptides, RA-III and VI from Rubia cordifolia
Authors: Itokawa Hideji , Morita Hiroshi , Takeya Koichi , Tomioka Nobuo , Itai Akiko 
Published: April 2006

Abstract
RAI-III and VI, conformational isomers of antitumor bicyclic hexapeptides, RA-III and VI, respectively, were isolated from Rubia cordifolia. By the conformational analysis of them using spectroscopic and computational chemical methods, they were shown to have γ-turn structures at residues 2,3, and 4, which were stabilized by a hydrogen bond between Ser-2-OH and D-Ala-1-CO.
Peroxyoxalate Chemiluminescent Assay of Ascorbic Acid Based on Autoxidation with Oxygen in Reversed Micelle
Authors: Kamidate Tamio , Katoh Masaki , Segawa Tadashi , Watanabe Hiroto 
Published: April 2006

Abstract
A highly sensitive chemiluminescence (CL) method was developed for the determination of ascorbic acid (AA) based on the conversion of AA to hydrogen peroxide (H2O2) in a cationic reverse micellar hexadecyltrimethylammonium chloride : chloroform medium. AA was indirectly determined by measuring the H2O2 generated by the peroxyoxalate CL method. The CL intensity was linearly correlated with AA concentration over the range from 5.0 × 10−8 to 1.0 × 10−6 M.
Inclusion Compounds of Cholic Acid with Various Hydrocarbons and the Crystal Structure of a 1 : 1 Complex of Cholic Acid and Benzene
Authors: Nakano Kazunori , Sada Kazuki , Miyata Mikiji 
Published: April 2006

Abstract
Cholic acid was found to form crystalline inclusion compounds with various hydrocarbons and related compounds. Some alcohols do not form inclusion crystals at all, but serve as solvents. The crystal structure of a 1 : 1 inclusion compound of cholic acid with benzene was determined. Comparative studies on inclusion behaviors of cholic acid and deoxycholic acid are now possible.
Construction of a Chiral Quaternary Carbon Center via 1,2-Acyl Migration of an Optically Active α,β-Epoxy Ketone
Authors: Okada Kunisuke , Katsura Toshiyuki , Tanino Hideo , Kakoi Hisae , Inoue Shoji 
Published: April 2006

Abstract
The construction of a chiral building block with a quaternary carbon center is described, based on the Lewis acid-catalyzed acyl migration of α,β-epoxy ketone with alkyl and alkenyl substituents.
Structural Change in Lithium Intercalation of Layered Perovskite LiLaNb2O7
Authors: Sato Mineo , Jin Tetsuro , Ueda Hirokazu 
Published: April 2006

Abstract
The chemical lithium intercalation of a layered perovskite LiLaNb2O7 compound has been performed by using n-butyllithium. The content of inserted lithium ions was found to be ca. 1 mol per unit formula. The crystal structure of the intercalated compound was determined by the powder X-ray diffraction pattern. An unusual contraction of the cell volume inherent in the intercalation reaction was observed.
Synthesis of a Cyclodextrin Heterodimer Having α- and β-Cyclodextrin Units and Its Cooperative and Site-Specific Binding
Authors: Wang Yong , Ueno Akihiko , Toda Fujio 
Published: April 2006

Abstract
A cyclodextrin heterodimer, which has α- and β-cyclodextrin units as two different receptor sites, was prepared. It showed cooperative and site-specific binding to isoamyl p-dimethylaminobenzoate with the alkyl group included in the β-cyclodextrin cavity while dimethylaminobenzene moiety partially included in the α-cyclodextrin cavity. This binding mode was substantiated by the fact that the TICT emission of this guest is greatly enhanced by the cyclodextrin heterodimer.
Helical Chirality and Enantiotopomerization Process of a Photochromic Furylfulgide
Authors: Yokoyama Yayoi , Iwai Takeshi , Yokoyama Yasushi , Kurita Yukio 
Published: April 2006

Abstract
A photochromic furylfulgide, (E)-2-[1-(2,5-dimethyl-3-furyl)-2-methylpropylidene]-3-isopropylidenesuccinic anhydride, was shown to be chiral. Its enantiotopomerization process was observed by variable temperature 1H NMR measurement, and ΔH≠(obs) was 52.9 ± 8.1 kJ mol−1. AM1 calculation showed ΔH≠(calc) to be 51.5 kJ mol−1.
In-situ EXAFS Observation of the Molecular Reaction Intermediate for NO–H2 Reaction on Highly Active Rh–Sn/SiO2 Catalysts
Authors: Tomishige Keiichi , Asakura Kiyotaka , Iwasawa Yasuhiro 
Published: April 2006

Abstract
In-situ EXAFS technique was successful by applied for the first time to observe the molecular reaction intermediate for NO–H2 reaction on highly active Rh–Sn/SiO2 catalysts. The EXAFS data, with the aid of FTIR, revealed the existence the bent-type NO with the bond distance of 0.256 nm with Sn atoms (Rh–NO···Sn) on the bimetallic surface in the steady-state reaction conditions. The tilted NO was dissociated to form Sn–O bond at 0.205 nm.
Spectral Cosensitization in Organic Solar Cell with Mixed Film of Zinc Porphyrin and Merocyanine
Authors: Takahashi Kohshin , Hashimoto Kei , Komura Teruhisa , Murata Kazuhiko 
Published: April 2006

Abstract
The Al/dye/Au sandwich-type photovoltaic cell with a mixed solid of 5,10,15,20-tetraphenylporphyrinatozinc (Zntpp) and 3-ethyl-5-[(3-ethyl-2(3H)-benzothiazolylidene)ethylidene]-2-thioxo-4-thiazolidinone (MC) exhibits a remarkably large energy conversion yield and a better spectral match with a solar spectrum, compared with a pure Zntpp or a MC solid.
Chiral Discrimination of Monosaccharides through Gel Formation
Authors: James Tony D , Murata Kazutaka , Harada Takaaki , Ueda Keiko , Shinkai Seiji 
Published: April 2006

Abstract
The cholesterylphenylboronic acid (1) and its complexes with mono saccharides (2 : 1; 1/monosaccharide) were prepared. Many of the isolated complexes form gels in a variety of solvents, some of which display D vs L chiral discrimination. This is the first example of chiral discrimination in a saccharide based gel system.
Study on the Nuclear Reactions of 93Nb, 181Ta, and 197Au Induced by Secondary Neutrons in 40 MeV/nucleon 40Ar Ion Collisions
Authors: Li Wenxin , Ohkubo Yoshitaka , Ambe Shizuko , Kobayashi Yoshio , Iwamoto Masako , Maeda Haruka , Ambe Fumitoshi 
Published: April 2006

Abstract
Nuclear reactions of 93Nb, 181Ta, and 197Au induced by secondary neutrons produced by irradiation of a thick stainless steel target with 40 MeV/nucleon 40Ar ions were investigated by off-line γ-ray spectroscopy. Yields of the radioactive products have been determined relative to that of 24Na produced by the 27Al(n,α)24Na reaction. The slopes of the mass distributions deduced from the experimental data are independent of the target species. Up to 7 nucleons were removed from the target nuclei, indicating significant presence of the neutrons with energies higher than 70 MeV.
Complex Formation between Iron(III) and Tartaric and Citric Acids in a Wide pH Range 1 to 13 as Studied by Magnetic Susceptibility Measurements
Authors: Yokoi Hiroshi , Mitani Tsuyoshi , Mori Yasuyoshi , Kawata Satoshi 
Published: April 2006

Abstract
Computer simulation analysis of the experimental plots of effective magnetic moment against pH for aqueous solutions of iron(III) and either l-tartaric acid or citric acid at different concentration ratios has first given the whole aspect of complex formation in a wide pH range 1 to 13 at room temperature. Formation of various kinds of poly- and mono-nuclear complexes has been elucidated in these solutions.
Synthesis and Properties of Germylene-Bridged Diiron Complexes Using t-Butylgermane as a Precursor of Ligands
Authors: Kawano Yasuro , Sugawara Keiko , Tobita Hiromi , Ogino Hiroshi 
Published: April 2006

Abstract
Photolysis of CpFe(CO)2SiMe3 (Cp = η-C5H5) in the presence of a new alkylgermane tBuGeH3 afforded a mono(μ-germylene)diiron complex Cp2Fe2(CO)3(μ-GeHtBu) (4) and a bis(μ-germylene)diiron complex Cp2Fe2(CO)2(μ-GeHtBu)2 (5). The structure of 4 was determined by X-ray crystallography.
The Stereoselective Synthesis of Trisubstituted Olefins by the Reaction of (2-Phenylthiocyclobutyl)methyl Benzoates and Methyl Ethers with Silyl Nucleophiles
Authors: Fujiwara Tooru , Iwasaki Toshiaki , Miyagawa Jun , Takeda Takeshi 
Published: April 2006

Abstract
The Lewis acid-promoted reaction of 2-phenylthiocyclobutanemethanol derivatives with silyl nucleophiles gave the corresponding trisubstituted olefins with high stereoselectivity in good yields. It is suggested that the reaction proceeds via the thionium ion intermediate.
New Intramolecular Five-Endo-Mode Cyclization of Allenyl Aryl Ketones
Authors: Nagao Yoshimitsu , Lee Woo-Song , Kim Kweon 
Published: April 2006

Abstract
A convenient preparation of allenyl aryl ketones was achieved by the Weinreb-modified Grignard reaction of N-methoxy-N-methylamides with propargylmagnesium bromide. On treatment with BF3·OEt2, the allenyl aryl ketones were converted to methylenebenzocyclopetenones via a new 5-endo-mode cyclization.
Stabilized Zirconia Based CO2 Sensors Combined with Carbonate Auxiliary Phase
Authors: Miura Norio , Yan Yongtie , Sato Masaki , Yao Sheng , Shimizu Youichi , Yamazoe Noboru 
Published: April 2006

Abstract
A solid-state electrochemical CO2 sensor was fabricated by combining an MgO-stabilized zirconia (MSZ) tube and Li2CO3 auxiliary phase. The sensor responded very well to 100–1000 ppm CO2 in air at 400–600 °C, with its EMF responses following the Nernst’s equation for the 2-electron reduction of CO2. It was also possible to fabricate an MSZ-based planar-type sensor, which gave stable EMF responses to CO2 regardless of variations in O2 concentration. The CO2 sensing mechanism of these sensors was briefly discussed.
Poly(thiophene-2,5-diyl) Having Crown Ethereal Subunit. Preparation, Stable n-Doped State, and Light Emitting Diode
Authors: Miyazaki Yuichi , Yamamoto Takakazu 
Published: April 2006

Abstract
π-Conjugated polythiophene having crown ethereal subunit, PCT5, reacts with metallic Na to afford a Na-doped or n-doped semiconducting material, which shows good stability against O2 in air presumably due to strong interaction between Na+ and the crown ethereal subunit. An ITO | PCT5 | Al electric junction serves as a light emitting diode, which starts to emit light at 6 V.
Hydrogenation of Biphenyls over the Hydrogen Storage Alloy MmNi3.5Co0.7Al0.8H4
Authors: Nakagawa Shin-ichi , Murata Satoru , Sakai Tetsuo , Nomura Masakatsu 
Published: April 2006

Abstract
Hydrogenation of biphenyl with the activated hydrogen storage alloy, MmNi3.5Co0.7Al0.8H4 (Mm: La, 30; Ce, 52; Pr, 5; Nd, 13 wt%), as a stoichiometric reductant proceeded effectively at 160 °C for 3 h under nitrogen to give either phenylcyclohexane or bicyclohexyl selectively, according to the ratio of the alloy to biphenyl.
Tin(II) Chloride Catalyzed Synthesis of Ribofuranosides
Authors: Shimomura Naoyuki , Saitoh Masahiro , Mukaiyama Teruaki 
Published: April 2006

Abstract
Catalytic synthesis of several d-ribofuranosides from 2,3,5-tri-O-benzyl-1-O-iodoacetyl-d-ribofuranose and trimethylsilylated nucleophiles such as 3β-cholestanyl trimethylsilyl ether and phenyl trimethylsilyl sulfide is efficiently promoted by tin(II) chloride under mild conditions. When allyltrimethylsilane, azidotrimethylsilane, etc., are used as nucleophiles, combined use of catalytic amounts of SnCl2 and SiCl4 also afforded the corresponding ribofuranosides in good yields.
A New Thermo-Sensitive Fatty Acid Complex. The Mechanism and Its Applicability to a Drug Delivery System
Authors: Yokoyama Shoko , Sunohara Masaaki , Fujie Tadao , Hasegawa Makoto , Abe Masahiko 
Published: April 2006

Abstract
A thermo-sensitive fatty acid-drug crystalline complex was prepared. The mechanism for the thermo-sensitivity was investigated by the powder X-ray diffractometry and the infrared spectroscopy, and its applicability to a thermo-responsive drug delivery system was discussed.
Synthesis of Higher-nuclearity Clusters by Use of Small Cluster Units as Building Blocks. Syntheses and X-Ray Analyses of p-[Co3(CO)9C]2C6H4 and [CH3CCo3(CO)8]2(μ-dppfe)
Authors: Onaka Satoru , Otsuka Mayumi , Mizuno Atushi , Takagi Shigeru , Sako Katsuya , Otomo Makoto 
Published: April 2006

Abstract
Two units of -CCo3 trinuclear cluster are systematically incorporated into various spacer molecules such as p-C6H4- and 1,1′-bis(diphenylphosphino)ferrocene, dppfe. X-Ray structure analysis has been made for p-[Co3(CO)9C]2-C6H4 (1) and [CH3CCo3(CO)8]2(μ-dppfe). Electronic interaction between two cluster units in 1 has been asserted by X-ray and absorption data.
Amination of o-Alkenylphenols with Alkylamines via Photoinduced Proton Transfer
Authors: Yasuda Masahide , Sone Tatsuya , Tanabe Kimiko , Shima Kensuke 
Published: April 2006

Abstract
Irradiation of o-alkenylphenols with alkylamines resulted in Markovnikov-type amination to give o-(1-alkylaminoalkyl)phenols in relatively good yields. The photoamination was initiated by a proton transfer from the ammonium ion to the alkenyl group of o-alkenylphenolate anion in the excited state in the ion pair formed between the phenols and the amines. The resulting zwitter ion allowed the nucleophilic addition of the amine at the benzylic cation center.
Regioselective Synthesis of 1,2- and 1,3-Bridged Calix[4]crowns. What Are the Factors Controlling the Regioselectivity?
Authors: Yamamoto Hiromasa , Sakaki Toru , Shinkai Seiji 
Published: April 2006

Abstract
The product distribution in the synthesis of calix[4]crowns from calix[4]arene-25,26,27,28-tetrol and 3,6-dioxaoctane-1,8-ditosylate was investigated in detail. It was shown that the 1,2- vs. 1,3-bridging regioselectivity is governed by the basicity and the metal cation of the used base. The findings enable us to regioselectively synthesize desired calix[4]crowns in good yields, which has been believed to be too difficult to control.
Improvement of CAPCIUS Cell Using SrCe0.95Yb0.05O3−α as a Solid Electrolyte
Authors: Hibino Takashi , Asano Koichi , Iwahara Hiroyasu 
Published: April 2006

Abstract
The CAPCIUS cell was improved using SrCe0.95Yb0.05O3−α as a solid electrolyte. When the operating temperature was 950 °C and the thickness of SrCe0.95Yb0.05O3−α ceramic was 0.5 mm, the maximum power density was 21 mW cm−2, which was about 10 times value observed in the CAPCIUS cell using YSZ with the same thickness as a solid electrolyte. The mechanism for the improvement was studied by various electrochemical techniques.
A New Type of Kinetic Equation for Crystal Growth Which Can be Applicable to the Second Step of a Two-Step Crystallization of Calcium Hypochlorite Dihydrate
Authors: Murakami Tsugio , Tsuchiya Susumu 
Published: April 2006

Abstract
The equation, dla/dt = k Cs exp (−b la), newly proposed can well express the rate of crystal growth in the second step of two-step crystallization of calcium hypochlorite dihydrate.
Magnetic Field Effects on Hydrogen Abstraction of Triplet Benzophenone with Thiophenol in an SDS Micellar Solution
Authors: Wakasa Masanobu , Sakaguchi Yoshio , Hayashi Hisaharu 
Published: April 2006

Abstract
The photoreduction of benzophenone with thiophenol was studied by a laser flash photolysis under the magnetic fields of 0–10 T. The escape yields of the benzophenone ketyl and phenylthiyl radicals decreased with increasing magnetic field strength. The observed magnetic field effect can be interpreted by the Δg mechanism in the case of a triplet radical pair.
Palladium-Catalyzed Aminocarbonylation of Cinnamyl N,N-Dialkylcarbamates. An Intriguing Crossover with p-Methylcinnamylamines
Authors: Miyazawa Masahiro , Yamamoto Keiji 
Published: April 2006

Abstract
Competition experiments in the palladium-catalyzed aminocarbonylation of cinnamyl N,N-dialkylcarbamates with p-methylcinnamylamines revealed that the allylamine did not undergo oxidative addition but attacked extensively a π-allylpalladium which arose from the allyl carbamate under the conditions employed, forming a mixture of the corresponding amides containing either cinnamyl moiety that incorporates a dialkylamino component originated only from the carbamate.
Synthesis of Dimethyl Garbonate by Electrolytic Carbonylation of Methanol in the Gas Phase
Authors: Otsuka Kiyoshi , Yagi Toshikazu , Yamanaka Ichiro 
Published: April 2006

Abstract
Electrolytic carbonylation of methanol has been attempted in the gas phase under atmospheric pressure at 343 K. The graphites added with PdCl2 and CuCl2 are favorable anodes for the synthesis of dimethyl carbonate (DMC). The formation of DMC occurs at a lower applied voltage than that for dimethoxy methane and methyl formate. However, a considerable CO2 formation accompanies the DMC formation.
Reactions and Kinetics of (2,4,6-Tri-tert-butylphenyl)phenylcarbene
Authors: Hirai Katsuyuki , Komatsu Kazunori , Tomioka Hideo 
Published: April 2006

Abstract
The title carbene generated by photolysis of the corresponding diazo compound at room temperature gave 4,6-di-tert-butyl-1,1-dimethyl-3-phenylindan quantitatively. Triplet states of the carbene were observed by laser flash photolysis of the diazo compound in the presence of benzophenone as a triplet sensitizer.
Preparation of Anti-Pyrenyl Antibody and Its Chiral Recognition against a Nonnatural Amino Acid Carrying Pyrenyl Group
Authors: Imaizumi Mitsuhiro , Sisido Masahiko 
Published: April 2006

Abstract
Monoclonal antibody was raised against a tetrapeptide containing l-pyrenylalanine. The antibody bound the tetrapeptide as well as l-pyrenylalanine methyl ester, indicating that it recognizes the pyrenyl group. The antibody, however, did not bind d-pyrenylalanine methyl ester. This finding suggests a potentiality of monoclonal antibodies for chiral separations.
A Useful Method for the Preparation of Carboxylic Esters from Free Carboxylic Acids and Alcohols
Authors: Shiina Isamu , Miyoshi So , Miyashita Mitsutomo , Mukaiyama Teruaki 
Published: April 2006

Abstract
Various carboxylic esters are prepared in excellent yields from nearly equimolar amounts of free carboxylic acids and alcohols at room temperature by combined use of 4-(trifluoromethyl)benzoic anhydride and a catalytic amount of active titanium(IV) salt together with chlorotrimethylsilane.
Dicarboxylic Acids in the Murchison and Yamato-791198 Carbonaceous Chondrites
Authors: Shimoyama Akira , Shigematsu Ryusuke 
Published: April 2006

Abstract
Dicarboxylic acids were recovered in the C2 to C9 range in concentration about 2000 to 0.1 nmol/g from the Murchison and Yamato-791198 carbonaceous chondrites. The molecular distributions of the saturated straight-chain acids suggest that they approximately show their original compositions when they were formed in the early solar system. Optical isomers of the acids were found to be racemic.
Oxidation of Diols with Sodium Bromite Trihydrate in Organic Solvents in the Presence of Alumina
Authors: Morimoto Takashi , Hirano Masao , Iwasaki Keiko , Ishikawa Takashi 
Published: April 2006

Abstract
The title oxidation of diols with two primary hydroxy groups (symmetrical diols) and those with both a primary and a secondary hydroxy group (unsymmetrical diols) gives the corresponding lactones or the hydroxy ketones, being dependent upon the types of diols.
Reversing-pulse Electric Birefringence of Montmorillonite Particles Suspended in Aqueous Media
Authors: Yamaoka Kiwamu , Sasai Ryo , Ikuta Natsuki 
Published: April 2006

Abstract
Reversing-pulse electric birefringence of montmorillonite was measured in aqueous media at 25 °C and at 633 nm. The counterion for this clay was either Na+ or Mg2+. The electric field orientation of the disk-shaped particle was due to ion-induced dipole moments but not due to permanent dipole moment.
Z- and threo-Selective 1-Methyl-2-butenylation of Aldehydes by 4-(Tributylstannyl)-2-pentene
Authors: Miyake Hideyoshi , Yamamura Kimiaki 
Published: April 2006

Abstract
Transmetallation of an E,Z-mixture of 4-(tributylstannyl)-2-pentene with BuSnCl3 proceeded stereoselectively to give (E)-4-(butyldichlorostannyl)-2-pentene (3). The subsequent addition of it to an aldehyde proceeded Z- and threo-selectively to give 1-methyl-2-butenylated product.
New Xanthic Acid Derivative as Selective Reagent for the Solvent Extraction of Palladium
Authors: Chowdhury Didarul Alam , Kamata Satsuo 
Published: April 2006

Abstract
Trimethylene-bis(n-butyl)xanthate (TrMBnBX) has been synthesized as a new sulfur-containing reagent for the extraction of precious metal ions. This compound exhibited high selectivity for extraction of Pd(II) and Ag(I) ions in dichloroethane, over Pt(IV), Au(III) and most of the base metal ions. A mixed aqueous system containing H2SO4 in presence of small amount of chloride ions provides the maximum extraction of Pd(II), where it forms a 1:1 complex with TrMBnBX.
New Six- to Eight-Membered-Ring Formation Based on the lntramolecular Endo-Mode Ring Closure of Allenyl (Substituted Phenyl)alkyl Ketones
Authors: Nagao Yoshimitsu , Lee Woo Song , Komaki Yoichi , Sano Shigeki , Shiro Motoo 
Published: April 2006

Abstract
Several allenyl ketones possessing an aryl group were submitted to a new intramolecular endo-mode cyclization with BF3·OEt2 or TiCl4 in CH2Cl2 to afford the corresponding 6-, 7-, and 8-membered carbocyclic products.
Facile Synthesis of 5-Substituted Arabinofuranosyluracil Derivatives
Authors: Sawai Hiroaki , Hayashi Hidekazu , Sekiguchi Sumie 
Published: April 2006

Abstract
Arabinoaminooxazoline reacted readily with α-(bromomethyl)acrylate derivatives to afford the corresponding adduct. Potassium tert-butoxide- or sodium methoxide-catalyzed cyclization of the adduct gave 5-substituted 2,2′-anhydroarabinofuranosyluracil derivatives.
Facile Syntheses of cis-Fused Carbobicycles via Combination of Claisen Rearrangement of Macrolactone and Nitrile Oxide Cycloaddition
Authors: Suh Young-Ger , Kim Soon-Ai , Cho Hyun-Uk , Cho Youn-Sang 
Published: April 2006

Abstract
cis-Bicyclo[3.3.0]octanone, cis-hydrindanone and cis-decalone skeletons have been efficiently constructed by intramolecular nitrile oxide-olefin cycloaddition of 1-ethenyl-2-nitroalkyl cycloalkanes or 1-ethenyl-2-hydroxyiminoalkyl cycloalkane which are readily derived from macrolactone by Funk’s Claisen rearrangement.
Syntheses, Structures, and Some Reactions of Di-μ-Hydroxo Dinuclear Complexes of Tungsten(IV) and Molybdenum(IV)
Authors: Ren Jian-Guo , Tomita Hideshi , Minato Makoto , Osakada Kohtaro , Ito Takashi 
Published: April 2006

Abstract
Novel dinuclear complexes [Cp2M(μ-OH)2MCp2]2+(OTs−)2 (M = Mo and W) were prepared by the reaction of Cp2MH2 with Cp2M(OTs)2 in aqueous acetone. Their structures were characterized by spectroscopic methods as well as by X-ray crystallography. The structure comprises a planar four membered ring consisting of alternating M and O atoms.