bluuebunny/crossref_metadata_2025_split huggingface dataset:
Catalytic Functions of Artificial Enzyme Composed of Simple Vitamin B12 Model and Synthetic Bilayer Membrane
Authors: Murakami Yukito , Hisaeda Yoshio , Song Xi-Ming , Fan Sheng-Di , Ohno Teruhisa 
Published: July 2006

Abstract
An artificial enzyme was constructed with a combination of the single-walled vesicle of N,N-dihexadecyl-Nα-[6-(trimethylammonio)hexanoyl]-l-alaninamide bromide (N+C5Ala2C16) and a simple vitamin Bi12 model; (11-hydroxyimino-4,10-dipropyl-5,9-diazatrideca-4,9-dien-3-one oximato)cobalt, [Co(C2C3)(DO)(DOH)pn], or [N-(2-hydroxyiminocyclohexylidene)-N′-(cyclohexyliden-2-one oximato)-1,3-diaminopropane]cobalt, [Co(ch)(DO)(DOH)pn]. Carbon-skeleton rearrangement reactions of alkyl ligands bound to the cobalt complex were markedly favored in the single-walled vesicle, relative to the reactions in methanol and benzene, under anaerobic photolysis conditions at ordinary temperatures. The cobalt complex incorporated into the intramembrane domain is subjected to significant repression of its molecular motion and to desolvation as confirmed by fluorescence and fluorescence polarization measurements. The 1,2-migration of cyano and carboxylic ester groups involved in the alkyl ligands is plausibly enhanced by such effects.
Substituent Effect in o-Nitroperbenzoic Acid Oxidation of m- and p-Substituted Acetophenones
Authors: Token Katsuo , Hirano Kenji , Yokoyama Tai , Goto Katsumi 
Published: July 2006

Abstract
The Baeyer–Villiger reaction of m- and p-substituted acetophenones (substituents: H, p-MeO, p-t-Bu, p-i-Pr, p-Et, p-Me, p-Cl, p-Br, m-MeO, m-Me, m-Cl) with o-nitroperbenzoic acid was studied in chloroform at 30°C. The rate constants for the general acid catalysis were measured at several concentrations of o-nitrobenzoic acid which acted as an acid catalyst. The uncatalyzed and acid-catalyzed rate constants obtained afforded ρ values of −2.16 and −4.11 with σ, respectively. The results indicated that the rate-determining step is the migration of the phenyl group in the peroxy acid-carbonyl adduct for all the substituents studied, whether the reaction is acid-catalyzed or not, and that the acid catalyst intervenes only in the formation of the acid-ketone adduct in the initial state and not in the migration step. The variation of the leaving group abilities required the variation of the substituent constants applied, whereas the acid intervention in the addition step was reflected only in the variation of the ρ value, not in the substituent constants to be applied. The smaller resonance demand for o-nitroperbenzoic acid indicated that the structure of the transition state in the migration step was looser and that the position of the transition state was earlier than those for m-chloroperbenzoic acid.
Molecular Structures of Trichlorovinyl(p-tolyl)nickel(II) Complex, and Its Thermal and Photo Isomerization Products
Authors: Chen Jie , Kai Yasushi , Kasai Nobutami , Wada Masanori , Kumazoe Makoto 
Published: July 2006

Abstract
The molecular structure of the trichlorovinyl(p-tolyl)nickel(II) complex (trans-[Ni(CCl=CCl2)(C6H4Me-4)(PMe3)2] (1)), its thermal isomerization product (trans-[NiCl{C(C6H4Me-4)=CCl2}(PMe3)2] (2)) and one of its photolysis products (trans-[NiCl{CCl=CCl(C6H4Me-4)}(PMe3)2] (3)) have been determined by an X-ray diffraction method. Crystal data: 1; triclinic, space group P\bar1, a=8.768(1), b=9.347(1), c=13.029(2) Å, α=103.79(2), β=96.23(2), γ=86.90(3)°, V=1030.4(3) Å3, Z=2, Dc=1.393 g cm−3, 2; orthorhombic, space group P212121, a=13.884(2), b=14.505(3), c=10.272(2) Å, V=2068.6(6) Å3, Z=4, Dc=1.388 g cm−3, 3; triclinic, space group P\bar1, a=11.628(4), b=8.975(3), c=10.437(4) Å, α=102.91(3), β=99.45(3), γ=89.91(4)°, V=1046.6(7) Å3, Z=2, Dc=1.377 g cm−3. Molecules 2 and 3 were found to contain p-totly group on the α-carbon and β-carbon atoms of the vinyl ligand, respectively. Intersting structural deformations were found in 1.
Synthesis, Structure, and NMR Spectra of [Cu2(phen)2(μ-(C6H5)2PCH2P(C6H5)2)2](PF6)2 and Its Derivatives
Authors: Kitagawa Susumu , Maruyama Hideki , Wada Shigetoshi , Munakata Megumu , Nakamura Masaki , Masuda Hideki 
Published: July 2006

Abstract
The bis(diphenylphosphino)methane(dppm) compounds of copper(I), [Cu2(μ-dppm)2(biL)2](PF6)2 (biL=1,10-phenanthroline and its derivatives), have been synthesized and characterized by 1H and 31P NMR spectroscopy and X-ray crystallography. The molecules are found to contain a [Cu2(dppm)2]2+ framework with the two copper atoms bridged by two dppm ligands to give eight-membered C2P4C2 rings. This framework shows a staggered conformation subject to the coordination of additional ligands, biL. The coordination 1H and 31P shifts of the dppm are well-correlated with the basicity of the nitrogen donor atom of biL, sensitive to variations in the copper-ligand binding as well as their metal-to-ligand charge-transfer band. Crystallographic data of [Cu2(dppm)2(phen)2] are as follows, monoclinic space group P21⁄c, a=11.515(2) Å, b=27.922(4) Å, c=12.493(2) Å, β=107.68(1)°, U=3827(1) Å3, and Z=2.
Five- and Six-Coordinated Nitrosyl Iron(II) Complexes of Tetrakis (p-substituted phenyl)porphyrins. Substituent Effects on the EPR Parameters and the NO Stretching Frequencies
Authors: Yoshimura Tetsuhiko 
Published: July 2006

Abstract
Five- and six-coordinated nitrosyl iron(II) complexes of a series of tetrakis(p-substituted phenyl)porphyrins have been prepared. Their EPR and IR spectra have been measured and analyzed in order to elucidate the cis-effect of substituents on the axial nitrosyl ligand. As the first redox potentials of the free base porphyrins in the complexes became positive, the NO stretching frequencies increased in both five-coordinated and six-coordinated nitrosyl(porphyrinato)iron(II) complexes with a nitrogenous base at an axial site trans to the NO group. The positive shift of the redox potentials led to an increase in the EPR g values and hyperfine coupling constants at room temperature and at 77 K for the five-coordinated complexes, while it led to a decrease in g values and to a slight increase in hyperfine coupling constants for the six-coordinated complexes. These results are rationalized by invoking that, as the electron-withdrawing power of porphyrin peripheral substituents is enhanced, the iron-to-NO bond in both the five- and six-coordinated complexes is weakened and the iron-to-nitrogenous base bond in the six-coordinated complexes is strengthened. The difference in the cis- and trans-effects on the EPR parameters and NO stretching frequencies is also discussed.
Studies of Zone Melting. VII. Distribution Coefficients of the p-Nitrophenol–Naphthalene Eutectic System
Authors: Nojima Hidemoto 
Published: July 2006

Abstract
In a zone-melting experiment the effective and equilibrium distribution coefficients of p-nitrophenol in naphthalene have been determined by a method based on a determination of the solute concentration in the terminal one zone length after a single zone pass. The effective distribution coefficient (Ke) is determined by
K e=\frac2Z*+1\left{1−\frac1Z*−1(\fracCs*C0−1)\ight},
where C0 is the initial solute concentration; Cs* is the solute concentration described above and Z*=L⁄l−1⁄2; L and l denote the specimen and zone lengths, respectively. Further, the equilibrium distribution coefficient (Ko) is obtained as
K o=\frac2(Z*−B)Z*2−1
The constant (B) is related to the equation Cs*⁄C0=−AV+B, where V is the zone travel rate and A is also a constant. The obtained values of Ke and Ko agree with those determined by a method reported previously by the author.
Copper(II)-Rare Earth(III) (Ln=La, Gd, Lu) Binuclear Complexes of Bis[2-(3-carboxysalicylidene)aminoethyl]amine: Characterization and Specific Binding of Amino Alcohols
Authors: Sakamoto Masatomi , Hashimura Masayuki , Matsuki Kimihiro , Tajima Kunihiko , Ishizu Kazuhiko , Okawa Hisashi 
Published: July 2006

Abstract
Heterometal complexes, [CuLn(fsadien)(NO3)(H2O)n]·(H2O)5−n (Ln=La, Gd, or Lu), have been synthesized and characterized, where H4 fsadien denotes bis[2-(3-carboxysalicylidene)aminoethyl]amine. Based on electronic absorption and CD spectra, it was suggested that amino alcohols were specifically bound to the Cu(II)–Ln(III) heterometal center, through the nitrogen to the copper(II) ion and through the oxygen to the rare earth(III) ion.
A Pd(II)–Cu(II) Catalyst for the Kjeldahl Analysis of Nitrogen in Pyridines
Authors: Oishi Shigero , Komatsuzaki Hiroshi 
Published: July 2006

Abstract
A serious drawback of the Kjeldahl analysis of organic nitrogen, that pyridine derivatives were difficult to degrade to ammonia, was overcome by use of a Pd(II)–Cu(II) catalyst. Three hours of digestion at approximately 320°C using the catalyst were found to be sufficient for quantitative liberation of ammonia from pyridines.
17O NMR Study of Aqueous Electrolyte Solutions; Effect of KCl and NaCl on the 17O NMR Parameters of Water
Authors: Higashiyama Akira , Yamamoto Yasuhiko , Ch\={u}j\={o} Riichir\={o} 
Published: July 2006

Abstract
The aqueous solutions containing KCl or NaCl at various concentrations have been studied by 17O NMR. The line width of the signal increases and decreases with an addition of KCl above and below 55 °C, respectivly, and these results indicate that the effect of KCl on the water structure depends on temperature.
Conversion of (+)-8,11,13-Abietatriene into (15R)-16-Hydroxyferruginol and Its (15S)-Epimer
Authors: Matsumoto Takashi , Terao Hiromitsu , Imai Sachihiko 
Published: July 2006

Abstract
(+)-8,11,13-Abietatriene was converted into (15R)-16-hydroxyferruginol (1a) and its (15S)-epimer (1b) by the introduction of hydroxyl groups at the C-12 and C-16 positions.
Mercury(63P1)- and Cadmium(53P1)-Photosensitized Decompositions of Tetramethyltin
Authors: Yamamoto Shunzo , Inoue Satomi , Sueishi Yoshimi , Nishimura Norio 
Published: July 2006

Abstract
The mercury(63P1)-photosensitized decomposition of tetramethyltin (TMT) has been studied at 120 and 250°C and at pressures from 10 to 20000 Pa. The gaseous products detected were ethane, methane, and hydrogen. The yields of these products increased linearly with increasing reaction time and light intensity. From the effects of O2, NO, and H2 on the yield of ethane, the major primary reactions of the mercury-photosensitized decomposition of TMT were concluded to be processes with an Sn–C bond cleavage. The quantum yields of these products were independent of the TMT pressure at higher pressures than 200 Pa at 120°C. The quantum yield of ethane was also independent of the TMT pressure, while that of methane increased upon increasing the pressure at 250°C. The cadmium (53P1)-photosensitized decomposition of TMT has been studied at 280°C. The detected products were the same as those from the mercury-photosensitized decomposition, although the yield of hydrogen was very small. The pressure dependence of the yields of ethane and methane in the cadmium-photosensitized decomposition was very similar to those in the mercury-photosensitized decomposition of TMT at 250°C.
Hydration of Cyclic Oligo(oxyethylene) Compounds. Ultrasonic Velocities and Compressibilities of Binary Systems of Water with 12-Crown-4, 15-Crown-5, and 18-Crown-6
Authors: Miyazaki Yoshio , Matsuura Hiroatsu 
Published: July 2006

Abstract
Ultrasonic velocities of binary systems of water with 12-crown-4, 15-crown-5, and 18-crown-6 were measured and the adiabatic compressibilities were evaluated therefrom. The results indicate that the most compacted hydration structure is formed at the mole ratio, approximately 2:1, of water to oxyethylene monomer unit and that the poly(oxyethylene) chain enhances structuring of the liquid water network.
Miscibility of 2-(Octylsulfinyl)ethanol and Decylammonium Chloride in the Adsorbed Film and Micelle
Authors: Abe Koji , Matsukiyo Hidetsugu , Ikeda Norihiro , Aratono Makoto , Motomura Kinsi 
Published: July 2006

Abstract
The surface tension of the aqueous solution of 2-(octylsulfinyl)ethanol (OSE) and decylammonium chloride (DeAC) mixture was measured as a function of total molality and composition of surfactants at 298.15 K under atmospheric pressure. The total surface density and compositions in the adsorbed film and micelle of the mixture were evaluated by applying thermodynamic relations to experimental results. It was found that the phase diagrams obtained for the adsorption and micelle formation of the mixture are different in shape from those of 2-(decylsulfinyl)ethanol (DeSE)–OSE and dodecylammonium chloride (DAC)–DeAC mixtures which are assumed to mix ideally in the adsorbed film and micelle. Such a nonideal behavior was attributed to the attractive interaction between OSE and DeAC molecules. Further, the interaction is concluded to be more attractive in the micelle than in the adsorbed film.
Investigation of Ion and Solvent Transport Accompanying Redox Reactions of Polyvmylferrocene Films Using an in situ Electrochemical Quartz Crystal Microbalance Technique
Authors: Mizunuma Masaya , Ohsaka Takeo , Miyamoto Hirohisa , Oyama Noboru 
Published: July 2006

Abstract
The in situ electrochemical quartz crystal microbalance (in situ EQCM) technique has been applied to study ion and solvent transport accompanying the redox reaction of polyvmylferrocene (PVF) film coated on quartz crystal electrodes in aqueous and acetonitrile media. The dependence of apparent formal potentials (Epolyf)app of the Fc°/Fc+ redox couple (Fc° and Fc+ represent the reduced and oxidized sites, respectively, in the PVF film) upon the concentration of supporting electrolyte has been also examined in comparison with those of solution-phase ferrocene derivatives. The PVF film is ideally permselective to ClO4− anion in both aqueous and acetonitrile media. The PVF oxidation (or reduction of polyvinylferricenium ion) in aqueous media is accompanied by the ingress (or egress) of one ClO4− ion per redox site and some solvent (ca. one H2O per redox site). In LiClO4 acetonitrile media, during the oxidation process ClO4− ion with some solvent inserts into the film and the reverse phenomenon occurs during the reduction process. The results demonstrate that a combination of the in situ EQCM measurement and the measurement of the dependence of (Epolyf)app on the concentration of supporting electrolyte makes possible to elucidate quantitatively the ion and/or solvent transport process across the polymer film/ solution interface during the redox reaction.
Synthesis and Characterization of Directly Linked Salen–Porphyrin System with Constrained Geometries
Authors: Maruyama Kazuhiro , Kobayashi Fumikazu , Osuka Atsuhiro 
Published: July 2006

Abstract
Novel heterobinucleating porphyrin complexes, in which porphyrin and salen [N, N′-disalicylidene-ethylenediamine] subunits were directly linked with restricted geometries, were synthesized. These complexes showed a small change in their UV-vis spectra and oxidation potentials, but the fluorescence of porphyrin was effectively quenched by the linked nickel–salen subunit.
Surface Active Properties of Heptyl β-d-Xyloside Synthesized by Utilizing the Transxylosyl Activity of β-Xylosidase
Authors: Shinoyama Hirofumi , Gama Yasuo , Nakahara Hisae , Ishigami Yutaka , Yasui Tsuneo 
Published: July 2006

Abstract
The surface-active properties of heptyl β-d-xyloside were investigated. The critical micelle concentration of this surfactant was determined to be 30 mM (M=mol dm−3). The corresponding molecular area at saturation adsorption, the micellar weight and the aggregation number were 43 Å, 20700 and 78, respectively. This surfactant was found to have a surface activity similar to that of octyl β-d-glucoside.
Preparation and Crystal Structure of a New Barium Niobium Sulfide, Ba9Nb4S21
Authors: Saeki Masanobu , Onoda Mitsuko 
Published: July 2006

Abstract
A new barium niobium sulfide, Ba9Nb4S21, was prepared by the reaction of CS2 with a mixture of BaCO3 and Nb2O5. Powder X-ray diffraction peaks and electron diffraction spots for the compound were indexable on the basis of a hexagonal cell with lattice parameters of a=6.9743(6) and c=21.599(2) Å. Refinement based on powder X-ray diffraction data suggested that the crystal structure belongs to the same series with those of Ba16.5Nb9S42 and Ba2NbS5 reported by Swinnea et al.
Ozone Fading of 2,2′-Dihydro Azo Copper Complex Dyes
Authors: Matsui Masaki , Tsubota Kenjiro , Shibata Katsuyoshi , Muramatsu Hiroshige 
Published: July 2006

Abstract
The reactivities of dyes with ozone were in the following order, Acid Blue 74&gt;disodium 1-(2-hydroxyphenylazo)-2-naphthol-3,6-disulfonate&gt;Direct Yellow 12&gt;Acid Orange 7&gt;disodium 1-phenylazonaphthalene-3,6-disulfonate-2,2′-diolatocopper(II)&gt;Mordant Red 3&gt;Basic Green 4. The reaction of disodium 1-phenyl-azonaphthalene-3,6-disulfonate-2,2′-diolatocopper(II) with ozone was retarded by the introduction of electron-withdrawing groups and 8-sulfonato group. The potassium sulfonate dye was less reactive than the sodium one. Ozonization of l-phenylazonaphthalene-2,2′-diolatocopper(II) gave phenol, 2-naphthol, and phthalic anhydride.
Preparation and Reactivities of (η3-1- and 2-Trimethylsiloxyallyl)Fe(CO)2NO Complexes. Intermediates Functioning as Equivalents of β- and α-Acyl Carbocations and Acyl Carbanions
Authors: Itoh Keiji , Nakanishi Saburo , Otsuji Yoshio 
Published: July 2006

Abstract
(η3-1- and 2-Trimethylsiloxyallyl)Fe(CO)2NO complexes were prepared by the reaction of the corresponding siloxyallylic halides with Bu4N[Fe(CO)3NO]. These complexes reacted with both of carbon nucleophiles and carbon electrophiles preferentially at the less hindered sites of the allylic ligands. In these reactions, (η3-1-trimethylsiloxyallyl)Fe(CO)2NO complexes served as synthetically equivalent synthons for both of β-acyl carbocations and j8-acyl carbanions and (η3-2-trimethylsiloxyallyl)Fe(CO)2NO complexes as both of α-acyl carbocations and α-acyl carbanions. The stereochemical courses of the reactions are described.
Synthesis and Reaction of trans-Dichlorobis(o-phenylenediamine)rhodium(III) Perchlorate with Some Oxidizing Agents
Authors: Furuhashi Akiko , Endo Kunihiko , Takagi Shiro , Yoshino Yukichi 
Published: July 2006

Abstract
A new rhodium(III) complex with o-phenylenediamine, trans-[RhCl2{C6H4(NH2)2}2]ClO4 was synthesized and the reaction with oxidizing agents studied. Due to coordination with the rhodium(III) ion the o-phenylenediamine (opd) was greatly stabilized against oxidation and the complex was oxidized slowly by periodate via intermediate radical complex to bis(o-benzoquinone diimine)dichlororhodium(III) complex which decomposed to the final products.
Michael Addition of Acyclic Lithium 1,3-Dien-2-olates with α,β-Unsaturated Esters, Ketones, and Diesters
Authors: Kanemasa Shuji , Kumegawa Masahiro , Wada Eiji , Nomura Masafumi 
Published: July 2006

Abstract
The Michael addition of lithium 1,3-dien-2-olates with α,β-unsaturated carbonyl compounds is described. With α,β-unsaturated esters the reaction was reversible even at −78°C, while kinetically controlled with α,β-unsaturated ketones or alkylidenemalonates. At room temperature, the initially formed Michael adducts undergo subsequent intramolecular Michael addition to give substituted cyclohexanone derivatives in a highly stereoselective manner. Mostly anti-selectivity has been observed for the initial Michael addition, and the intramolecular cyclization was cis-selective.
Preparation and Magnetic Properties of the Copper(II) Mixed Carboxylates with Haloacetate and Ammonioacetate
Authors: Emori Shuji , Yoshidzu Kayoko 
Published: July 2006

Abstract
Copper(II) mixed carboxylate compounds, CuX(X′CH2COO)(R3NCH2COO)·mH2O (X=C1, Br; X′=F, Cl; R=, CH3), were prepared, and then characterized by means of magnetic susceptibility and IR-spectroscopy. The mixed carboxylates with betaine have the copper(II) acetate-type dinuclear structures. The amount of spin-exchange coupling through betaine bridges was estimated.
Complex Formation of Poly(Acrylic Acid) with Lead(II) Ion
Authors: Hayashi Hiromichi , Komatsu Tsuyoshi 
Published: July 2006

Abstract
The equilibrium constants of Poly(acrylic acid)–Pb(II) complex formation reactions were evaluated from stoichiometric equations by means of pH titration with a Pb(II) ion selective electrode. The thermodynamic parameters were obtained from the temperature dependence of the equilibrium constants. The Poly(acrylic acid)–Pb(II) complexes seem to be stable due to an exothermic process.
Syntheses and Spectral Properties of New Nitrosyl-[poly(1-pyrazolyl)borato]ruthenium Complexes
Authors: Onishi Masayoshi 
Published: July 2006

Abstract
Trichloro(nitrosyl)ruthenium(III) was treated with alkali-metal or thallium poly(1-pyrazolyl)borates M(BRPz3) (Pz=1-pyrazolyl) to give new nitrosyl[poly(1-pyrazolyl)borato]ruthenium(III) complexes [RuCl2(BRPz3)(NO)] (1, R=Pz; 2, R=H). A similar reaction with thallium tris(3,5-dimethyl-1-pyrazolyl)hydroborate TlBH(3,5-Me2Pz)3 (3,5-Me2Pz=3,5-dimethyl-1-pyrazolyl) afforded the complex [RuCl2{BH(3,5-Me2Pz)3}(NO)] (3) as the minor product and the 3,5-dimethylpyrazole complex [RuCl3(NO)(3,5-Me2PzH)2] as the major one. The observation of ν(NO) bands over the range 1870 to 1900 cm−1 determined the NO+ linear coordination mode in these complexes, rather than NO− bent one. The ν(NO) values of 1–3 were larger than those of the corresponding known π-cyclopentadienyl analogues by ca. 90 cm−1, indicating a smaller degree of π-back donation of metal–NO bonds in the former complexes. 1H, 13C, and 1B NMR data of the new complexes are described. In 1H NOE measurements of 1, irradiation at a chemical shift of 5-H protons in the coordinated pyrazolyl groups induced a positive NOE on the 5-H proton in the uncoordinated group, and individual assignments of the pyrazolyl protons were carried out with the help of 1H–1H and 13C–H COSY.
Extraction-Spectrophotometric Determination of Osmium Using 4-(2-Pyridylazo)resorcinol
Authors: Dadfarnia Shayessteh , Shamsipur Mojtaba 
Published: July 2006

Abstract
An extraction-spectrophotometric method for the determination of trace amounts of osmium(VIII) is described. Osmium is quantitatively extracted from aqueous solutions at pH 3.0–3.5 into a 10 : 1 chloroform–methyl isobutyl ketone mixture with tetrabutylammonium bromide, followed by spectrophotometric determination, using 4-(2-pyridylazo)resorcinol as a metallochromic indicator. The orange-red mixed complex of osmium absorbs light at λmax=530 nm with a molar absorptivity of 2.5×104 dm3 mol−1 cm−1. Beer’s law is obeyed over the range 0.5–18 μg cm−3. The method has a wide range and is sensitive and free from interferences from many anions and cations, including some platinum metals.
Catalytic Oxidation of Naphthalene on Palladium in Cooperation with Copper(I)/(II) Redox Couple
Authors: Kuroda Yasushi , Kunai Atsutaka , Hamada Michiyuki , Kitano Tomoyuki , Ito Sotaro , Sasaki Kazuo 
Published: July 2006

Abstract
Catalytic oxidation of naphthalene in moist acetic acid solutions has been studied. The catalyst used was a silica-supported palladium which works in cooperation with the Cu+/Cu2+ redox couple. Products were 1-naphthol, 1,4-naphthoquinone and (E)-2-formylcinnamaldehyde with a total yield of more than 78% in which naphthoquinone shared 40%. Reaction mechanism has been discussed in comparison with that of benzene.
Synthesis of 5′-[1-(Methoxycarbonyl)-2-(p-methoxyphenyl)ethyl]-and 5′-[2-(methoxyphenyl)-1-(p-methoxyphenyl)ethyl]-2′,3′,4,4′,6′-pentamethoxychalcone
Authors: Obara Heitaro , Onodera Jun-ichi , Tsuchiya Mitsuhiro , Matsueda Hiroyuki , Sato Shingo , Matsuba Shigeru 
Published: July 2006

Abstract
5′-[1-(Methoxycarbonyl)-2-(p-methoxyphenyl)ethyl]- and 5′-[2-(methoxycarbonyl)-1-(p-methoxypheny)ethyl]-2′,3′,4,4′,6′-pentamethoxychalcone were synthesized.
The latter compound was completely identical with the methylated derivative of aglycone of safflomin C, a constituent of safflower (Carthamus tinctorius L).