bluuebunny/crossref_metadata_2025_split huggingface dataset:
Kemp’s Acid Imides as Uphill Transport Carriers for Alkaline Earth Metal Ions
Authors: Hirose Takuji , Baldwin Bruce W , Uchimaru Tadafumi , Tsuzuki Seiji , Uebayashi Masami , Taira Kazunari 
Published: March 2006

Abstract
N-Substituted-1,3,5-trimethylcyclohexane-3,5-imido-1-carboxylic acids efficiently transported CaII and MgII from alkaline earth metal ion mixtures against their concentration gradient through a chloroform liquid membrane.
Photocatalytic Decomposition of Trichlorobenzene Using TiO2 Supported on Nickel-Poly(tetrafluoroethylene) Composite Plate
Authors: Uchida Hiroyuki , Katoh Shinobu , Watanabe Masahiro 
Published: March 2006

Abstract
Using TiO2 photocatalysts supported on nickel-poly(tetrafluoroethylene), Ni-PTFE, composite plate, a rapid and complete degradation of trichlorobenzene in dilute aqueous solution was performed. The Ni-PTFE substrate enhanced the decomposition rate of pollutants, since electrons photogenerated in TiO2 were efficiently consumed in the reduction of dissolved oxygen as a reaction coupled with the oxidative degradation.
Preparation of Various Azulenequinone Derivatives by a Nucleophilic Substitution of 3-Bromoazulenequinone Synthones
Authors: Nozoe Tetsuo , Wakabayashi Hidetsugu , Shindo Kimio , Ishikawa Sumio 
Published: March 2006

Abstract
3-Bromo derivatives of 1,5- and 1,7-azulenequinones easily react with various nucleophiles to give 3-methoxy, phenoxy, p-nitrophenoxy, butylthio, butylamino, p-tolylamino, dimethylamino, 2-hydroxyethylamino, azulenyl, and guaiazulenyl derivatives of the respective azulenequinones almost quantitatively. 3-Bromo-1,5- and -1,7-azulenequinones afford the 2,3-bisbutylthio derivatives under basic conditions.
An NMR Study on Complexation of p-tert-Butylcalix[6]arene Ester Derivatives with Ethylammonium Picrate
Authors: Ahn Sangdoo , Chang Suk-Kyu , Kim Taehoon , Lee Jo Woong 
Published: March 2006

Abstract
Complexation of p-tert-butylcalix[6]arene ester derivatives with ethylammonium ion was investigated via measurement of their proton relaxation times and chemical shifts in CDCl3. The results suggest that the endo-type complexes are formed and the overall rotation of these complexes is more rapid than that of the corresponding free hosts.
Effect of Triamine Ligands (L) on the Acidity of L-Zn-OH2 as a Model Compound of CA and AP
Authors: Fujii Yuki , Itoh Toyofumi , Onodera Kazuhiko , Tada Toshiji 
Published: March 2006

Abstract
The acid dissociation constants of coordinated water of L-Zn-OH2 (L = diethylenetriamine (1),N-(2-aminoethyl)-1,3-propanediamine (2), dipropylenetriamine (3), 1,3,5-triaminocyclohexane (4), and 1,5,9-triazacyclododecane (5)) and the hydrolysis rate constants of diphenyl 4-nitrophenyl phosphate (6) promoted by L-Zn-OH were found to correlate linearly with the enthalpy change (ΔH) for the formation of L-Zn-OH2, which corresponds to the binding energy of Zn-L: the smaller the binding energy is, the stronger the Lewis acidity of zinc ion is and the faster the hydrolysis is.
In Vivo Electron Paramagnetic Resonance Imaging of NO-Bound Iron Complex in a Rat Head
Authors: Yoshimura Tetsuhiko , Fujii Satoshi , Yokoyama Hidekatsu , Kamada Hitoshi 
Published: March 2006

Abstract
Electron paramagnetic resonance (EPR) imaging of NO-bound iron complex in the head of the living rat has been carried out by L-band EPR imaging system. The NO-bound iron complex used as an imaging reagent was a nitrosyl iron complex with N-(dithiocarboxy)sarcosine. Intraperitoneal administration of the imaging reagent to a living rat has provided a clear EPR image derived from the paramagnetic complex in the rat head.
Nucleophilic Substitution Reaction of Optically Pure Chloroselenurane with Active Methylene Compounds. Formation of Optically Pure Selenonium Ylides
Authors: Takahashi Tamiko , Kurose Noriyuki , Kawanami Saburo , Nojiri Atsuko , Arai Yoshitsugu , Koizumi Toru , Shiro Motoo 
Published: March 2006

Abstract
Nucleophilic substitution reaction of (RSe)-chloroselenurane 1 with active methylene compounds proceeded in highly stereoselective manner with retention of configuration to give (SSe)-selenonium ylides 2. (SSe)- and (RSe)-Ylides, 2 and 3, were stereospecifically formed from the reaction of (RSe)- and (SSe)-selenoxides, 4 and 5, with active methylene compounds.
Hydrogen-bonded Charge-Transfer Complex of Ethylenediaminoglyoxime Transition Metal Complex with Tetracyanoquinodimethane
Authors: Itoh Tetsuji , Toyoda Jiro , Tadokoro Makoto , Kitagawa Hiroshi , Mitani Tadaoki , Nakasuji Kazuhiro 
Published: March 2006

Abstract
We prepared the hydrogen-bonded charge-transfer complex containing a transition metal, (ethylenediaminoglyoximato)(ethylenediaminoglyoxime)palladium(II), with TCNQ, which showed a segregated stacking mode of crystal structure and contained H-bonds between the anionic and cationic columns and between the cationic columns. The high electrical conductivity (90 Scm−1) was observed.
Structural Determination and Thin Film Preparation of LiYSiO4 by Sol-Gel Method
Authors: Sato Mineo , Ueda Hirokazu , Kono Yasuhisa 
Published: March 2006

Abstract
LiYSiO4 was synthesized by sol-gel method and its crystal structure was determined by the Rietveld analysis. The structure was found to be an olivine-type structure with orthorhombic Pnma space group. The thin film deposited on an quartz substrate could be prepared by a dip-coating method using sol solutions consisting of lithium i-propoxides, silicon tetraethoxide and yttrium acetate.
Kinetics and Mechanism of Ozone Decomposition on a Manganese Oxide Catalyst
Authors: Dhandapani Balamurugan , Oyama Shigeo Ted 
Published: March 2006

Abstract
The ozone decomposition reaction to molecular oxygen was studied in a flow reactor on a MnO2 / γ-Al2O3 / cordierite catalyst. The rate expression is found to depend on ozone concentration, rO3 = k(O3)0.68, but not on O2 or H2O partial pressure. A reaction sequence based on an ionic type intermediate with superoxide (O2−) or peroxide (O22−) character is proposed to explain the kinetics.
Artificial Cell Wall for Plant Protoplast. Coating of Plasma Membrane with Hydrophobized Polysaccharides
Authors: Guo Ze-jian , Kallus Stefan , Akiyoshi Kazunari , Sunamoto Junzo 
Published: March 2006

Abstract
Protoplasts of Daucus carota were coated by a hydrophobized polysaccharide, such as cholesterol-bearing modified pullulan (CHP) or cholesterol-bearing xyloglucan phosphate (CHXP), that provided an artificial cell wall to the protoplast. The polysaccharide-coating was confirmed directly by a confocal laser microscopy using FITC-labeled polysaccharide derivative. The artificial cell wall certainly increased the viability of the protoplasts even in the presence of cellulase.
Ln(OTf)3- or Sc(OTf)3-Catalyzed Three Components Coupling Reactions between Aldehydes, Amines, and Dienes or Alkenes. Efficient Syntheses of Pyridine and Quinoline Derivatives
Authors: Kobayashi Shu , Ishitani Haruro , Nagayama Satoshi 
Published: March 2006

Abstract
Three components coupling reactions between aldehydes, amines, and dienes or alkenes were catalyzed by lanthanide or scandium triflate to afford pyridine and quinoline derivatives in high yields. The Lewis acid catalysts were stable and kept their activity even in the presence of water and amines.
One-Pot Condensation/Hydrosilylation System for IPN Formation
Authors: Iwahara Takahisa , Kotani Jun , Ando Kiyoshi , Yonezawa Kazuya 
Published: March 2006

Abstract
A one-pot low-molecular model reaction system of condensation (1) and hydrosilylation (2) was proposed and studied for preparation of a silicon-based IPN. To make the both reactions proceed selectively, selection of catalysts and hydrosilanes were of importance. Effects of homogeneity of the system were also considered.
Totally Synthetic Voltage Dependent Ion Channel
Authors: Kobuke Yoshiaki , Ueda Ken , Sokabe Masahiro 
Published: March 2006

Abstract
Phosphate monoester of tetra(butylene 1,4-glycol) monobutyl ether was combined with dioctadecyldimetylammonium cation to make an ion pair. When inserted into planar lipid bilayers, it afforded stable and constant single ion channel currents. The open probabilities varied depending on the applied voltage while keeping the conductance constant, giving rise to a mimic of the voltage dependence.
High Efficient Catalytic Oxidation of Steroidal Olefins by Metalloporphyrin-Reductant-Molecular Oxygen Biomimetic Systems
Authors: Solovieva Anna B , Borovkov Victor V , Lukashova Ekaterina A , Grinenko Galina S 
Published: March 2006

Abstract
Catalytic oxidation of steroidal olefins by metalloporphyrin-reductant-molecular oxygen systems produces stereoselectively corresponding 5-α-hydroxy derivatives with high yields and the manganese complexes show higher efficiency in comparison with the iron complex due to the difference in metal-porphyrin orbital interactions.
A Convenient Synthesis of Methyl 2-[2-(1-Amino)ethenyl-bithiazolyl] thiazoline-4-carboxylate, an Important Skeleton of Cyclothiazomycin
Authors: Shin Chung-gi , Ito Akio , Okumura Kazuo , Nakamura Yutaka 
Published: March 2006

Abstract
The convenient syntheses of a few methyl 2-(1-amino)alkenyl thiazoline-4-carboxylates and methyl 2-[2-(1-amino)ethenyl-bithiazolyl] thiazoline-4-carboxylate have been accomplished. The latter is an important partial skeleton of macrobicyclic peptide antibiotic cyclothiazomycin.
Synthesis and Properties of Poly(methylphenylsilane) Containing Anthracene Units
Authors: Suzuki Hiroshi , Satoh Shin , Kimata Yoshinori , Kuriyama Akira 
Published: March 2006

Abstract
A poly(methylphenylsilane) containing anthracene units in the polymer backbone was synthesized by the Wrutz-type reaction of 9,10-bis(methylpropylchlorosilyl)anthracene and methylphenyldichlorosilane. This polymer exhibited light blue photoluminescence with 87% quantum efficiency. The excitation spectrum suggested that energy transfer occurred intramolecularly from the polysilane chain to anthracene in the excited state.
Catalytic Decomposition of N2O over Rhodium-Loaded Metal Oxides
Authors: Oi Junko , Obuchi Akira , Ogata Atsushi , Yagita Hiroshi , Bamwenda Gratian R , Mizuno Koichi 
Published: March 2006

Abstract
The catalytic decomposition of dinitrogen oxide to nitrogen and oxygen was studied over various rhodium-loaded metal oxides. Rh/ZnO was found to have the highest activity. The effects of metal loading and calcination conditions upon the catalytic performance were also examined. An air-pretreated 0.5 wt% Rh/ZnO was found to be the most active catalyst with a reaction rate of 4.0 × 104 μmol (N2O) · g−1 · h−1 under conditions of 950 ppm of N2O and 5% of O2 at 300 °C.
Stereoselective Synthesis of N-Acetyl-α-neuraminosyl-galactose Disaccharide
Authors: Mukaiyama Teruaki , Sasaki Takenori , Iwashita Eiichiro , Matsubara Koki 
Published: March 2006

Abstract
The glycosylation of N-acetylneuraminic acid (Neu5Ac) donor having an easily accessible acetoxy or phenoxycarbonyloxy leaving group at an anomeric position with the 6-OH position of d-galactose in propionitrile is effectively promoted by the catalyst generated from dichlorodimethylsilane and silver perchlorate to afford the corresponding α-sialosides in good yield with good stereoselectivity.
X-Ray Crystal Structure of Guaiazulenequinone and the Structures of Two New Guaiazulenone Derivatives
Authors: Takekuma Hideko , Takekuma Shin-ichi , Matsubara Yoshiharu , Yamamoto Hiroshi , Nozoe Tetsuo 
Published: March 2006

Abstract
The first X-ray crystallographic analysis on azulenequinones is reported for 3,5-guaiazulenedione. Two unique azulenone derivatives, 3a-hydroxy-3(3aH)-guaiazulenone and 2,2′-bi-3,5-guaiazulenedione, are obtained by the autoxidation of 5,5′-biguaiazulene-3,3′(5H,5′H)-dione in pyridine at 25 °C. The possible reaction pathways for these azulenone formation are discussed.
Electroreduction of a Chlorofluoroethane on a Solid Polymer Electrolyte Composite Electrode
Authors: Inaba Minoru , Sawai Ken , Ogumi Zempachi , Takehara Zen-ichiro 
Published: March 2006

Abstract
The dechlorination of 2-chloro-1,1,1,2,-tetrafluoroethane (HCFC-124) was carried out electrochemically on a solid polymer electrolyte composite electrode (Pd-Neosepta). As the sole product 1,1,1,2-tetrafluoroethane (HFC-134a) was obtained. Irradiation with light of a xenon arc lamp enhanced the dissociation of C–Cl bond of the reactant adsorbed on Pd, resulting in an increase in the rate for HFC-134a formation.
Synthesis and Evaluation as a Gene Transfer Agent of a 1,2-Dimyristoyl-sn-glycero-3-pentalysine Salt
Authors: Weibel Jean-Marc , Kichler Antoine , Remy Jean-Serge , Gaiddon Christian , Loeffler Jean-Philippe , Duportail Guy , Heissler Denis 
Published: March 2006

Abstract
1,2-Dimyristoyl-sn-glycero-3-pentalysine hexakis(trifluoroacetate) 1 has been synthesized and its transfection efficiency has been compared with that of the commercially available lipid DOTAP (3T3 mouse fibroblast cells; CMV-Luc plasmid). When the positive (lipid) / negative (DNA) charge ratio was 6, the lipid 1 was 1.7 times more efficient than DOTAP.
Synthesis and Dynamic Stereochemistry of Bis(3-methyl-1-azulenyl)(1-naphthyl)methyl Hexafluorophosphate. Clear Evidence of the One-Ring Flip Mechanism of Molecular Propeller by Controlling the Flipping Ring
Authors: Ito Shunji , Fujita Miwako , Morita Noboru , Asao Toyonobu 
Published: March 2006

Abstract
Stable carbocation, bis(3-methyl-1-azulenyl)(1-naphthyl)methyl hexafluorophosphate was synthesized by the hydride abstraction reaction of the corresponding hydrocarbon. The cation showed extremely high stability with pKR+ value (11.0). The low temperature 1H NMR spectra showed that the flipping ring was controlled by 1-naphthyl group.
Cyclic Fulgenates. Enlargement of Quantum Yield of Coloring Reaction of Photochromic Fulgenates
Authors: Yokoyama Yasushi , Miyasaka Masahiro , Uchida Soichi , Yokoyama Yayoi 
Published: March 2006

Abstract
Four cyclic indolylfulgenates, derivatives of fulgenates with 1,4-butane-, 1,5-pentane-, and 1,10-decanediols and 1,2-bis(hydroxymethyl)benzene, were synthesized and their photochromic properties were compared with those of dimethyl indolyfulgenate. The most notable feature of cyclic fulgenates with relatively short alkyl chains is that the coloring quantum yield of UV-light irradiation is much larger than that of the acyclic fulgenate and that of the cyclic fulgenate with a long alkyl chain.
Structures of Four Novel Highly Oxygenated Labdane-Type Diterpenoids, Ptychantins F-I, from the Liverwort Ptychanthus striatus
Authors: Hashimoto Toshihiro , Horie Miho , Takaoka Shigeru , Tori Motoo , Asakawa Yoshinori 
Published: March 2006

Abstract
Four novel highly oxygenated labdane-type diterpenoids, named ptychantins F-I (1–4) have been isolated from the liverwort Ptychanthus striatus, and their structures including their absolute configurations established by a combination of high resolution NMR and CD spectra, X-ray crystallographic analysis, and chemical degradations.
New Type of C-Pivot Tripode Ligands for Complexation towards Alkali Metal Cations
Authors: Nakatsuji Yohji , Kita Kohji , Masuyama Araki , Kida Toshiyuki 
Published: March 2006

Abstract
A series of C-pivot tripode ligands containing a 2-methylglycerol unit were newly prepared and their complexation properties towards alkali metal cations were examined by the solvent extraction method and UV spectroscopy. These types of compounds possessed a higher extractability than the other type of tripode ligand derived from trimethylolethane. This finding clearly shows that the proper selection of the basic skeletal structure is important for the molecular design of C-pivot tripode ligands.
A New System for Alkane Oxidation. Modification of Gif-type Reactions Using O2/H2 with a Pd Catalyst
Authors: Kim Sang-Bum , Jun Ki-Won , Kim Seong-Bo , Lee Kyu-Wan 
Published: March 2006

Abstract
We have investigated the modification of Gif-type reactions using hydrogen peroxide formed in situ by the palladium catalyzed combining of oxygen and hydrogen. The oxidation of cyclohexane in the solvent mixture, acetone-acetic acid, gives cyclohexanol and cyclohexanone with rather high yields, but any solvent containing pyridine is not suitable for the modified system.
A Novel Concept of Acid Proliferation. Autocatalytic Fragmentation of an Acetoacetate Derivative as an Acid Amplifier
Authors: Ichimura Kunihiro , Arimitsu Koji , Kudo Kazuaki 
Published: March 2006

Abstract
tert-Butyl 2-methyl-2-(p-toluenesulfonyloxymethyl)acetoacetate was designed to be subjected to the acid-catalyzed fragmentation to liberate p-toluenesulfonic acid which can act as the autocatalyst to lead to the increment of the acid concentration in geometric progression.
Synthesis of an Upper-rim-connected Biscalix[4]arene and Its Improved Inclusion Ability Based on the Cooperative Action
Authors: Araki Koji , Hisaichi Katsuya , Kanai Toshio , Shinkai Seiji 
Published: March 2006

Abstract
Conformationally-immobile biscalix[4]arene made by connecting the upper rims showed the high inclusion ability for N-methylpyridimium and homologous cationic guest molecules. Comparison with reference compounds established that the enhanced inclusion ability is due to the cooperative action of two upper-rim-confronted calix[4]arenes.
Charge Separation in Zinc Diporphyrin-Zinc Porphyrin-Pyromellitimide-Quinone Tetrads
Authors: Osuka Atsuhiro , Yamada Hiroko , Maruyama Kazuhiro , Ohno Takeshi , Nozaki Koichi , Okada Tadashi , Tanaka Yoshinori , Mataga Noboru 
Published: March 2006

Abstract
Tetrads 3 and 5 consisting of 1,2-phenylene-bridged zinc diporphyrin (D), zinc porphyrin (M), pyromellitimide (I), and quinone (Q) were synthesized. Upon photoexcitation, these tetrads provide fully charge separated ion pair states (D)+—M—I—(Q)−, whose lifetimes are longer than those of corresponding Q-free triads.
Analysis of Ion Association Property of Aromatic Divalent Anions with Quaternary Ammonium Ions in Aqueous Solution through Mobility Change of Capillary Electrophoresis
Authors: Takayanagi Toshio , Motomizu Shoji 
Published: March 2006

Abstract
Formation of ion associate in an aqueous solution has been examined using some aromatic divalent anions and symmetric quaternary ammonium ions through the mobility change of capillary electrophoresis. The electrophoretic mobilities of the anions decreased with an increase in the concentrations of bulky quaternary ammonium ions. Ion association constants (Kass) of 2,6-naphthalenedicarboxylate, 1,5-naphthalenedisulfonate, and 2,6-naphthalenedisulfonate with tetrabutylammonium ion as a pairing ion were determined to be 101.4, 101.4, and 101.3, respectively, while mobility changes of 2,3-naphthalenedicarboxylate and phthalate ions were slight. Several quaternary ammonium ions were examined. The results suggest that the bulkiness of the pairing cations is related to the ion association in aqueous solutions.
Highly Enantioselective Imino Pinacol Coupling Leading to the Synthesis of 1,2-Diphenylethylenediamine Derivatives
Authors: Shimizu Makoto , Iida Toyoshi , Fujisawa Tamotsu 
Published: March 2006

Abstract
Enantioselective imino pinacol coupling of p-anisylbenzalimine was promoted by the use of Zn-Cu couple in the presence of (+)-camphorsulfonic acid to give (R,R)-1,2-diphenylethylenediamine derivative in high enantiomeric purity.
Pre-equilibrium Determining the Rate and Selectivity in the Ligand-exchange of Cu(II) Complex, Cu(II)(H−2Gly-Gly-X), with Cysteine to Yield a Ternary Complex, (Cys)N,SCu(II)(H−1Gly-Gly-X)
Authors: Hanaki Akira , Nagai Akiko , Ikota Nobuo 
Published: March 2006

Abstract
Equilibrium constant for the reaction of Cu(II)(H−2Gly-Gly-X) with N-acetyl-l-cysteine to yield a ternary complex, (AcCys)SCu(II)(H−2Gly-Gly-X), was determimed. A linear free energy relationship existed between this equilibrium constant and rate constant for the ligand-exchange with l-cysteine to form a ternary complex, (Cys)N,SCu(II)(H−1Gly-Gly-X), indicating the presence of pre-equilibrium state in the ligand-exchange reaction.
Synthesis of Model Compounds of the Precursor of Carthamin, a Colouring Matter of Safflower, and Their Conversion into Carthamin-Type Compounds
Authors: Kumazawa Toshihiro , Amano Yoshikazu , Haga Toyokazu , Matsuba Shigeru , Sato Shingo , Kawamoto Ken-ichi , Onodera Jun-ichi 
Published: March 2006

Abstract
Model compounds of the precursor of carthamin 3, 4, and 5 were prepared. And in analogy with the precursor of carthamin (PRE) 1, they were converted into carthamin-type compounds 13, 14, and 15, respectively, when sprayed with peroxidase-H2O2 solution. It was also found that these conversions proceeded quantitatively by treatment with phosphate buffer extract of a cultured safflower cell and this conversion reaction proceeded by oxidative decarboxylation.
The Methylene Adduct of Bis(1,2-diphenyl-1,2-ethylenedithiolato)nickel(II): A Nickel(II) Complex of cis-(Methylenethio)stilbenethiol Which Cyclodimerizes to 4,5,9,10-Tetraphenyl-1,3,6,8-tetrathia-4,9-cyclodecadiene
Authors: Sakurada Masami , Schlemper Elmer O , Schrauzer Gerhard N 
Published: March 2006

Abstract
The reaction of bis(1,2-diphenyl-1,2-ethylenedithiolato)nickel(II), Ni(S2C2Ph2)2, with diazomethane affords a 1:1 methylene adduct, Ni[CH2(S2C2Ph2)2] (2), which is identified as a nickel(II) complex of cis-(methylenethio)stilbenethiol (3). Ligand 3 cyclodimerizes, on decomposition of 2 or by reaction of 2 with 2,2′-bipyridyl, to yield 4,5,9,10-tetraphenyl-1,3,6,8-tetrathia-4,9-cyclodecadiene.
Novel S-Bridged Tetranuclear Cobalt(III) Complexes with 2-Aminoethanethiolate Formed by Ligand Transfer from Nickel(II) to Cobalt(III)
Authors: Konno Takumi , Okamoto Ken-ichi 
Published: March 2006

Abstract
The reaction of [CoCl(NH3)5]2+ with [Ni(aet)2] (aet = 2-aminoethanethiolate) in water gave two pairs of racemic isomers of a novel S-bridged tetracobalt(III) complex, [{Co2(aet)2}{Co(aet)3}2]4+, in which four chiral cobalt atoms are linked by one double and two triple sulfur-bridges to have a boat-type metal array.
Reaction of Guaiazulene with Bromine in Hexane and in Aqueous Tetrahydrofuran
Authors: Nozoe Tetsuo , Shindo Kimio , Wakabayashi Hidetsugu , Kurihara Teruo , Uzawa Jun 
Published: March 2006

Abstract
3-Bromoguaiazulenium bromide and 3,3-dibromo guaiazulenium bromide were obtained respectively from the reaction of guaiazulene and its 3-bromo compound with 1 equivalent of bromine in hexane at −20 °C. The former compound afforded in methanol a mixture of guaiazulene, 3,3′-biguaiazulene, and oligomers, and gave 3-bromoguaiazulene quantitatively with alkali. Dibromoguaiazulenium bromide afforded with further moles of bromine in aqueous THF a mixture of guaiazulenequinone, 3-bromo-1-hydroxyguaiazulen-5-one, and a dark blue solid A in different ratios depending on the reaction conditions.
The First Trigonal-bipyramidal Structure of Zinc(II) Complex of a Bleomycin Model
Authors: Kurosaki Hiromasa , Hayashi Kentarou , Ishikawa Yoshinobu , Goto Masafumi 
Published: March 2006

Abstract
A new bleomycin analogue 2-[((2-(imidazolyl)ethyl)amino)carbonyl]-6-[((2-amino-2-methylpropyl)amino)methyl]pyridine, L, was prepared and the coordination mode of L to Zn(II) was characterized in both solution and solid state as a Zn(II)-bleomycin model complex. With L, ZnII forms 4-coordinate, tetrahedral [ZnL]2+ at pH &lt; 6 and 5-coordinate [ZnH−1L]+ at pH &gt; 8. The [ZnH−1L]ClO4·H2O complex has a trigonal-bipyramidal complex structure by the X-ray crystal study.
New Xenia Diterpenoids from a Soft Coral, Xenia Species
Authors: Iwagawa Tetsuo , Amano Yasuhisa , Hase Tsunao , Shiro Motoo 
Published: March 2006

Abstract
Two new xenia diterpenoids, xeniatine A (1) and xeniaether A (2), the latter containing a tetrahydrofuran, have been isolated from a soft coral, Xenia sp.