bluuebunny/crossref_metadata_2025_split huggingface dataset:
Polarized Raman and Infrared Spectra of 2-Amino- and 2-Amino-d2-pyrimidines
Authors: Maehara Masayoshi , Nakama Sekiichiro , Nibu Yoshinori , Shimada Hiroko , Shimada Ryoichi 
Published: July 2006

Abstract
An assignment of the normal vibrations of 2-aminopyrimidine was made through the vibrational analyses of the polarized Raman and infrared spectra and also through the normal coordinate calculation. The assignment was confirmed by the same study made on 2-amino-d2-pyrimidine.
Photochemical C–P Bond Cleavage of Nitrobenzylphosphonate Ions
Authors: Okamoto Yoshiki , Iwamoto Narimasa , Toki Susumu , Takamuku Setsuo 
Published: July 2006

Abstract
Upon UV-irradiation, the C–P bond of p-nitrobenzylphosphonate ions cleaved with a quantum yield of about 0.7 in an aqueous alcohol solution to give 1,2-bis(4-nitrophenyl)ethane, p-nitrotoluene, orthophosphate, and alkyl dihydrogenphosphate. Whereas in an aqueous solution 1,2-bis(4-nitrophenyl)ethane was produced as a main product, in an alcohol solution only p-nitrotoluene was produced. This photolysis may proceed via intramolecular electron transfer from PO32− group to nitro aromatic moiety to form an excited state, which undergoes C–P bond cleavage to give p-nitrobenzyl anion and monomeric metaphosphate anion as intermediates. The C–P bond cleavage of p-nitrobenzylphosphonate ion occurred more readily than those of o- and m-nitrobenzylphosphonate ions.
Effect of an Ionic Surfactant on the Kinetic Properties of an Aqueous Nonelectrolyte Solution Studied by Ultrasonic Methods
Authors: Nishikawa Sadakatsu 
Published: July 2006

Abstract
In order to investigate the effect of ionic surfactant on the dynamic properties of nonelectrolyte aqueous solutions, the ultrasonic absorption, velocity and the conductivity have been measured for aqueous solutions of triethylene glycol monobutyl ether (TGBE) in the presence of sodium dodecyl sulfate (SDS) at 25 °C. In aqueous solution of TGBE, a clear single relaxational ultrasonic absorption is observed in the MHz frequency range. When SDS is added the relaxation process is observed in the more dilute solutions, the relaxation frequency shifts to lower frequency and the amplitude of the excess absorption increases in the TGBE concentration range of less than 1.0 mol dm−3. Further, for TGBE concentration greater than 1.0 mol dm−3, the relaxation frequency is found to be almost independent of SDS concentration and the amplitude of the excess absorption decreases with increasing SDS concentration. The observed relaxation is well accounted for by a kinetic scheme involving the interaction between the nonelectrolyte and water. From the concentration dependence of TGBE, the rate and thermodynamic parameters have been determined as a function of SDS concentration. The obtained data have been interpreted in terms of the structural changes of the solvent water by SDS molecules. As the results, it has been proposed that the hydrophobic parts of SDS have a considerable effect on water structure.
A Novel Method for Determining the Chelation Ability of the Cysteine-Containing Peptides with 3,4-Toluenedithiol. Application to [2Fe–2S]-Ferredoxin Model Systems
Authors: Ueyama Norikazu , Ueno Satoru , Nakamura Akira 
Published: July 2006

Abstract
The chelating ability of a bidentate ligand, Cys–X–Y–Cys (X, Y=amino acid residue), in 2Fe–2S peptide model complexes was examined by a ligand-exchange method using 3,4-toluenedithiol (tdt-H2) or o-xylene-α,α′-dithiol. The addition of tdt-H2 to an N,N-dimethylformamide solution of [Fe2S2(Z–cys–Ala–Ala–cys–OMe)2]2− results in the cleavage pf Fe–S* (S*=inorganic sulfur) bond and in the formation of hydrogen sulfide and mononuclear Fe(III) peptide thiolate complex, [Fe(Z–cys–Ala–Ala–cys–OMe)(tdt)]1−. In the case of [Fe2S2(Z–Ala–cys–OMe)4]2−, [Fe2S2(tdt)2]2− was obtained by the substitution of Z–Ala–Cys–OMe with the chelating reagent. On the other hand, o-xylene-α,α′-dithiol expels both Z–Cys–Ala–Ala–Cys–OMe and Z–Ala–Cys–OMe ligands from these complexes.
Preparation and Metal-Adsorption Properties of the Polymer-Coated Silica Gel Having Iminodiacetate Functional Group
Authors: Suzuki Toshishige M , Itabashi Osamu , Goto Tomio , Yokoyama Toshiro , Kimura Tetsuo 
Published: July 2006

Abstract
A new adsorbent containing an iminodiacetate group has been prepared by the surface modification of a polymer-coated silica gel. The obtained beads (SG–IDA) are porous and have a high specific surface area (≈350 m2 g−1). The adsorption properties of SG-IDA, including the adsorption capacities, equilibrium distribution coefficients (Kd) and adsorption rates, have been examined for divalent metal ions. The selectivity order of SG–IDA is Cu(II)&gt;Pb(II)&gt;Ni(II)&gt;Zn(II)&gt;&gt;Ca(II)&gt;Mg(II). The SG–IDA shows appreciably high Kd values and rapid kinetics toward the adsorption of heavy metal ions. The concentration of 10 ppb level of metal ions [Cu(II), Zn(II), and Cd(II)] has been demonstrated using the SG-IDA column.
Magnetic Properties of Dimeric Copper(II) Trichloroacetate Adducts with 3-Substituted Pyridines
Authors: Muto Yoneichiro , Nakashima Michio , Tokii Tadashi , Kato Michinobu , Suzuki Ikuo 
Published: July 2006

Abstract
Dimeric copper(II) trichloroacetate adducts with 3-substituted pyridines, [Cu(Cl3CCOO)2(3-Xpy)]2 where X=Cl, Br, H, CN, and CH3, have been prepared. Magnetic susceptibility and ESR data show that both the singlet–triplet separation (−2J) and the zero field splitting (D) decrease in the order: 3-Clpy adduct (193 and 0.397 cm−1)≈3-Brpy adduct (191 and 0.399 cm−1)&gt;py adduct (188 and 0.385 cm−1)&gt;3-CNpy adduct (138 and 0.216 cm−1)&gt;3-CH3py adduct (83 and 0.182 cm−1). Electronic spectra indicate that the adducts with X=Cl, Br, and H have a distorted square-pyramidal copper(II) geometry and that those X=CN and CH3 have a distorted trigonalbipyramidal geometry. Form these results, it is concluded that the strength of antiferromagnetic interaction in [Cu(Cl3CCOO)2(3-Xpy)]2 complexes decreases as the distortion of copper(II) geometry increases from squarepyramid toward trigonal-bipyramid.
Control of the Impregnation Profile of Co in an Al2O3 Sphere
Authors: Otsuka Masashi , Fujiyama Takeshi , Tsukamoto Yoshikazu , Tsuiki Hideyasu , Ueno Akifumi 
Published: July 2006

Abstract
A radial distribution of cobalt metal particles in an alumina sphere was controlled by impregnation of the spheres with a solution composed of cobalt nitrate dissolved in ethylene glycol, ethyl silicate, and a small amount of nitric acid. The radial position of cobalt narrow band in the sphere was varied with the impregnation time and the cobalt loading was controlled by the concentration of cobalt nitrate in the impregnation solution. It was also found that porous SiO2 film resulted from the gelling of ethyl silicate covered whole external surface of the sphere.
Liquid Crystalline Compounds Bearing Pyridine Ring: Azoxy Compounds with Alkyl Substituents
Authors: Kamogawa Hiroyoshi , Kasai Tsuneharu , Andoh Toshio , Nakamura Tomoyuki 
Published: July 2006

Abstract
Azoxy compounds bearing a 2,5-disubstituted pyridine ring as a principal constituent and at least one alkyl group at a molecular end were synthesized and their mesomorphic (nematic) ranges were examined. As for azoxy compounds containing an alkyl and an alkoxy group at both ends, respectively, mesomorphic ranges appeared with lower alkyl groups than those for azo compounds, their precursors. The ranges were also lower than those with both alkoxy ends. As regards an azoxy compound containing alkyl groups at both ends, no mesomorphic phenomenon appeared within the scope of this study.
Synthesis of Opically Active 3-Morpholinecarboxylic Acid and Tetrahydro-2H-1,4-thiazine-3-carboxylic Acid
Authors: Kogami Yuji , Okawa Kenji 
Published: July 2006

Abstract
A convenient synthesis of optically active 3-morpholinecarboxylic acid and its thio analogue, tetrahydro-2H-1,4-thiazine-3-carboxylic acid, has been developed. These intermediates were obtained by reaction of benzyl (S)-N-benzyloxycarbonyl-2-aziridinecarboxylate and its enantiomer with 2-chloroethanol or 2-chloroethanethiol, respectively.
In Situ Trapping of NO: Application of S-Nitroso Derivatives for Metal Nitrosyls Synthesis
Authors: Pandey Daya Shankar , Saini S K , Agarwala Umesh Chandra 
Published: July 2006

Abstract
Several known nitrosyl complexes of Ru, Rh, and Co have been synthesized using S-nitroso organic compound (S-nitrosocysteine). Physicochemical methods such as IR, magnetic measurements, conductance measurements, and elemental analysis were used for characterization of the reaction products.
Photochemical Behavior of Aluminum–Ethyl Complex with Tetraaza Macrocyclic Ligand, Al(C22H22N4(C2H5)
Authors: Oshio Hiroki , Tero-Kubota Shozo , Ito Tasuku 
Published: July 2006

Abstract
Homolytic photocleavage of an aluminum carbon bond in ethyl(1,8-dehydro-5,7,12,14-tetramethyldibenzo[b,i][1,4,8,11]tetraazacyclotetradecinato)aluminum was confirmed by using EPR technique. The photochemistry of this aluminum carbon bond was also studied by NMR and emission spectroscopic experiments.
Polymers as Reagents and Catalysts. XI. Stereospecific Iodofluorination of Alkenes in the Presence of Polymer Supported Hydrogen Fluoride
Authors: Gregorcic Ana , Zupan Marko 
Published: July 2006

Abstract
N-Iodosuccinimide reacted with phenyl substituted alkenes in the presence of insoluble polymer supported hydrogen fluoride, which was prepared by reaction of hydrogen fluoride with crosslinked poly(styrene-co-4-vinylpyridine) containing 40–45 mol% of 4-vinylpyridine, thus forming vicinal iodofluorides in high yields. Reactions proceeded with Markovnikov type regioselectivity, and in the case of (Z)- and (E)-stilbene, (Z)- and (E)-1-phenylpropene and indene anti stereospecificity was also observed. Iodofluorinations of phenyl substituted acetylenes occurred regio and stereospecifically, forming (Z)-1-fluoro-2-iodo-1-phenylalkenes, with lower yields than those observed in the case of alkenes.
The Liquid-Junction Potential at the Contact of Two Immiscible Electrolyte Solutions in the Absence of Supporting Electrolytes Reference Electrodes Reversible to Alkylammonium Ions and Tetraphenylborate Ion in Nitrobenzene
Authors: Kakiuchi Takashi , Senda Mitsugi 
Published: July 2006

Abstract
The liquid-junction potentials between two immiscible electrolyte solutions have been studied for the interface: R1+TPB−(nitrobenzene)/R1+X−(water) and R1+TPB− (nitrobenzene)/Li+TPB−(water), where R1+ is a tetraalkylammonium ion, TPB− is tetraphenylborate ion, and X− is a halide ion. These interfaces may be seen as a simplest form of either a liquid ion-exchange membrane ion-selective electrode sensing the activity of the ion in the aqueous phase or a reference electrode of a liquid membrane type reversible to the ion in the nonaqueous phase. The effects of the cationic species(R1+), the anionic species(X−) and the concentration of the electrolytes on the electrical potential difference developed at the interface have been studied. These properties of the interfaces were compared with a simplified theoretical treatment of the liquid-junction potential between the two immiscible solutions. The theory can predict the basic features of the system by knowing the standard ion-transfer potentials and the diffusion coefficients of the relevant ions as well as its concentration. In the concentration range where a significant deviation from the Nernstian response of the liquid-junction potential occurred, the diffusion potential has been demonstrated to contribute significantly to the liquid-junction potential.
Electrical Conductivities of Tetrakis(alkylthio)tetrathiafulvalene (TTCn–TTF) and Tetrakis(alkyltelluro)tetrathiafulvalene (TTeCn–TTF)
Authors: Imaeda Kenichi , Enoki Toshiaki , Shi Zurong , Wu Peiji , Okada Naoko , Yamochi Hideki , Saito Gunzi , Inokuchi Hiroo 
Published: July 2006

Abstract
Electrical conductivities have been measured for TTCn–TTF and TTeCn–TTF. In the case of TTCn–TTF, the compounds with short alkyl chains (n=1–3) show the high resistivities above 1010 Ω cm, while the resistivities of the compounds with long alkyl chains (n≥4) decrease to 105–107 Ω cm. The relatively low resistivities of the compounds with long alkyl chains are attributed to the considerable reduction in intermolecular distance between adjacent TTF skeletons caused by intermolecular interactions through alkyl chain groups taking into account the results of their crystal structures, thermal properties and densities. As for TTeCn–TTF compounds, the carbon number dependence of resistivity is almost similar to that of TTCn–TTF in the range of large n (n≥8). Exceptionally, TTeC1–TTF exhibits noticeably low resistivity of 6.9×104 Ω cm. X-Ray diffraction study confirms that the high conductivity of TTeC1–TTF is caused by the formation of zigzag Te chains due to the presence of strong intermolecular Te–Te atomic contacts.
Photo-Excitable Membranes. Photoinduced Potential Changes across Poly(vinyl chloride)/Spirobenzopyran Membranes Doped with Valinomycin and Nonactin
Authors: Anzai Jun-ichi , Hasebe Yasushi , Ueno Akihiko , Osa Tetsuo 
Published: July 2006

Abstract
Poly(vinyl chloride)/spirobenzopyran membranes doped with valinomycin or nonactin were prepared to study the photoresponse of the membrane potential in the presence of K+ or NH4+ ion. Ultraviolet (UV) light irradiation induced more than 100 mV of potential change across the membrane doped with valinomycin in the presence of 10−8–10−6 M KCl, whereas the potential change was extremely suppressed in the presence of higher KCl concentration (&gt;10−3 M). The photoresponse of the membrane potential depended upon the direction from which the membrane was irradiated. The nonactin-doped membranes showed a similar tendency in photoresponse in the presence of NH4Cl to that observed for the valinomycin-doped membrane in the presence of KCl. The results were explained in terms of surface potential changes at the irradiated surface of the membrane, associated with the photochemical reaction of spirobenzopyran and the specific adsorption of cations to the surface of the membrane.
Fluorescence Reactions of “Crowned” Benzothiazolylphenols with Alkali and Alkaline Earth Metal Ions and Their Analytical Applications
Authors: Nakashima Kenichiro , Nagaoka Yukari , Nakatsuji Shin’ichi , Kaneda Takahiro , Tanigawa Isamu , Hirose Keiji , Misumi Soichi , Akiyama Shuzo 
Published: July 2006

Abstract
The fluorescence behavior by a complexation of “crowned” benzothiazolylphenols (CBTP and CBBTP) with alkali and alkaline earth metal ions in the presence of triethylamine was examined in various organic solvents. The fluorescence spectra of these CBTP– and CBBTP–metal ion complexes were measured in order to compare mutually both their excitation and emission maxima together with the relative fluorescence intensities (RFI). Both the Li–CBTP and Li–CBBTP complexes showed considerably higher RFI than the other metal complexes. The stability of the fluorescence intensity and various conditions for the determination of Li+ or Ca2+ were fully examined. On the basis of these experiments, fluorometric methods were developed for a sensitive determination of trace amounts of Li or Ca by using the crown compounds (CBTP and/or CBBTP). Moreover, a thin-layer chromatographic method for the separation of Li from other metal ions was examined in order to selectively determine Li by using CBBTP.
Estimation of Salt and Temperature Effects on Ion Product of Water in Aqueous Solution
Authors: Maeda Masunobu , Hisada Osamu , Kinjo Yoshiaki , Ito Kaname 
Published: July 2006

Abstract
The ion product of water at 298.15 K was evaluated according to the Pitzer ionic interaction theory in LiCl, NaCl, KCl, KNO3, LiClO4, and NaClO4 media of different concentrations (0.1–5 mol kg−1) and in artificial seawaters at different salinities (20–44%). The Pitzer approach was also applied to the estimation of the ion products of water in NaCl media at temperatures (288–373 K) different from 298.15 K. The theoretically evaluated values showed reasonable agreement with experimental ones.
Mössbauer Study of Iron Oxide Surface Layers Formed on Fine Iron Particles
Authors: Maeda Yonezo , Aramaki Masaaki , Takashima Yoshimasa , Oogai Michiharu , Goto Takeshi 
Published: July 2006

Abstract
Mössbauer studies of iron oxides formed on the surface of fine iron particles (acicular type about 15 nm in diameter and 100 nm long) and of an oxidation process in air have been done in the temperature range from 4.2 to 298 K. The Mössbauer spectra indicate that the main component of the oxide layers 2.1–5.6 nm thick, except for a few oxide layers from the iron surface, is composed of fine particles of γ-Fe2O3, and that fine iron oxide particles are produced freshly during the oxidation process at 110 °C in air with the growth of iron oxide particles. It is concluded that an oxide layer 2.1 nm thick is formed on the iron surface if a fresh iron surface is exposed to air at room temperature.
Synthesis of Hexahydroindenones through a Diels–Alder Cycloaddition and Nazarov Cyclization Sequence of Triene Alcohols
Authors: Wada Eiji , Fujiwara Isamu , Kanemasa Shuji , Tsuge Otohiko 
Published: July 2006

Abstract
The Diels–Alder cycloaddition of 4-methylene-1,5-hexadien-3-ols with olefinic dienophiles such as dimethyl maleate, fumarate, and N-methylmaleimide produces 1-(1-cyclohexenyl)-2-propen-1-ols. These diene alcohols are oxidized with activated manganese(IV) oxide to give dienones, which are then treated with acid catalysts to undergo ready electrocyclization leading to hexahydroindenones with functional groups. Stereoselectivity at the electrocyclization step is found to depend upon the stereostructures of cyclohexene skeleton of the dienones as well as the reaction conditions.
Photochromic Behavior of Pyridoxal–α-Amino Acid–Zn(II) Complexes in Methanol
Authors: Ohga Kazuya , Kurauchi Yoshiaki 
Published: July 2006

Abstract
Zn(II) complexes of pyridoxal–α-amino acid Schiff bases showed photochromic behavior in methanol. Spectral studies revealed that intramolecular nucleophilic attack of 5′-hydroxyl group on imine linkage forms cyclic α-amino ether intermediates which thermally return to the original complexes. The photochromism was characteristic of complexes having a 1:1 ligand–metal ratio. Analogous photochromism was also observed with the Cd(II) complex of N-pyridoxylidenevaline having a fully occupied d-orbital like the Zn(II) complexes, whereas no photochromism was observed with other transition metal complexes such as Ni(II), Cu(II), Mn(II), and Co(II) complexes.
Michael Addition and Alkylation of 2-Azaallyl Anions Derived from N-(1-Cyanoalkyl)imines, and Stereoselective Cyclization of Imine Esters or Ketones Leading to 1-Pyrrolines
Authors: Tsuge Otohiko , Ueno Kazunori , Kanemasa Shuji , Yorozu Kiyotaka 
Published: July 2006

Abstract
The 2-azaallyl anions derived from N-(1-cyanoalkyl)imines and DBU undergo Michael addition or alkylation to produce N-(1-alkylated 1-cyanoalkyl)imines. The Michael addition of some aryl-substituted imines are highly diastereoselective. The alkylated Michael adducts are converted into lactams through a hydrolysis and recyclization sequence. Base-induced cyclization furnishes 1-pyrrolines through a cyclization and HCN elimination sequence. In the latter reaction, 4,5-cis-1-pyrrolines are selectively produced when the adducts are treated with LDA in the presence of lithium iodide.
Metallic Base-Induced Cycloadditions of N-(1-Cyanoalkyl)imines via N-Metalated Azomethine Ylides: Enhanced Reactivity and High Regio- and Stereoselectivity
Authors: Tsuge Otohiko , Kanemasa Shuji , Yorozu Kiyotaka , Ueno Kazunori 
Published: July 2006

Abstract
Lithiation of N-(1-cyanoalkyl)imines with LDA generates new N-lithiated azomethine ylide 1,3-dipoles which show enhanced reactivity toward dipolarophiles. They undergo exclusively regio- and stereoselective 3+2 cycloaddition reaction with α,β-unsaturated esters to give 1-pyrrolines after the elimination of LiCN. Metallic bases other than LDA can be also effective. Such high regio- and stereoselectivity is explained by the involvement of N-metalated azomethine ylides.
An Efficient Regeneration of Singlet Oxygen from 2,5-Diphenylfuran Endoperoxide Produced by a Dye-Sensitized Oxygenation
Authors: Usui Yoshiharu , Koike Hiroshi , Kurimura Yoshimi 
Published: July 2006

Abstract
The maximum quantum yield of 4.5 was evaluated from the kinetic analysis for the Methylene Blue-sensitized oxygenation of 2,5-diphenylfuran, and the contribution of a chain process to produce the furan endoperoxide was suggested. After the photoreaction, the thermolysis of the endoperoxide occurred to regenerate 2,5-diphenylfuran and singlet oxygen and to produce cis-1,2-dibenzoylethylene simultaneously. The activation energy of singlet oxygen recovery was estimated to be 18.5 kcal mol−1. The reversible conversion of singlet oxygen took place efficiently with thiazine and xanthene dyes. A concerted dissociation of singlet oxygen from the endoperoxide was supposed from the negative value of activation enthropy (−9.8 e.u.) for the reaction.
Hydrogenation of Aromatic Nitro Compounds with A Pt/SiO2–AlPO4 Catalyst
Authors: Aramendía Lopidana M Angeles , Borau Bolos Victoriano , Jiménez Sanchi̊dri̊an Cesar , Marinas Rubio J María , Rodero Luque Francisco 
Published: July 2006

Abstract
In this work we have carried out the reduction of aromatic nitro compounds bearing different substituents with gaseous hydrogen, over a Pt catalyst (3% by weight) supported on a SiO2–AlPO4 system. The catalyst was obtained by impregnation, the impregnating metal salt being reduced with α-phellandrene. The kinetic data found allow us to describe the reduction of nitrobenzene as a Langmuir–Hinslwood kinetic. The sequence of reaction rates for the different nitro compounds assayed conforms to the Hammett–Taft equation, which allows relating the electron density of the aromatic ring to the reduction rate of the nitro group. Finally, we propose mechanism for the process, characterized by the absence of intermediates with net charges.
Irreversible Nature of the Stacked β-Pleated Sheets of a Model Polypeptide
Authors: Maeda Hiroshi 
Published: July 2006

Abstract
A mode of association of β-sheets, most probably the stacking of the pleated sheets, has been studied by circular dichroism and light scattering on the 5×10−2 mol dm−3 NaCl solutions of poly(S-carboxymethyl-l-cysteine). It was found that the association is highly irreversible with respect to concentration change at constant pH. Relevance of the study of synthetic polypeptides is discussed in relation to the association mode found in proteins.
Asymmetric Synthesis Using Chiral Piperazine. I. Asymmetric Synthesis of 2-Substituted Alcohol and Carboxylic Acid by Diastereoselective Alkylation of Chiral Diamides Derived from Piperazines
Authors: Soai Kenso , Hayashi Hiroshi , Shinozaki Akihiro , Umebayashi Hideaki , Yamada Yasuyuki 
Published: July 2006

Abstract
The diastereoselective alkylation of chiral diamides derived from chiral piperazines afforded optically active alcohols and acids in moderate enantiomeric excesses (up to 68% e.e.).
An Anion Radical Salt of a Quinone Fused with 1,3-Dithiole Units. Crystal and Molecular Structure of a Tetraethylammonium Salt of 2,6-Dithioxobenzo[1,2-d:4,5-d′]bis[1,3]dithiole-4,8-dione
Authors: Suzuki Takanori , Kabuto Chizuko , Yamashita Yoshiro , Miyashi Tsutomu 
Published: July 2006

Abstract
Crystal structure of the title salt was determined by the X-ray analysis. Segregated columnar stacks of anion radicals are formed along the c axis, in which quinone molecules are not spaced equally but forming dyads with short contacts between sulfur atoms.
Stereoselective Synthesis of Conjugated Dienones via the Palladium-Catalyzed Cross-Coupling Reaction of 1-Alkenylboronates with 3-Halo-2-alken-1-ones
Authors: Satoh Naoyuki , Ishiyama Tatsuo , Miyaura Norio , Suzuki Akira 
Published: July 2006

Abstract
The synthesis of conjugated dienones by means of palladium-catalyzed cross-coupling reaction between (E)-1-alkenyl-1,3,2-benzodioxaboroles or diisopropyl (Z)-1-hexenylboronate with 3-halo-2-alken-1-ones is described.