bluuebunny/crossref_metadata_2025_split huggingface dataset:
Friedel-Crafts Benzylation of Toluene with Benzyl Chloride Catalyzed by Metal Oxides
Authors: Arata Kazushi , Azumi Norio , Sawamura Hiromitsu 
Published: July 2006

Abstract
Metal oxides were found to catalyze significantly the Friedel-Crafts type benzylation of toluene with benzyl chloride with a selectivity similar to that occurring with metal sulfates.
The Crystal and Molecular Structure of Emericellin, A Metabolite of Aspergillus nidulans
Authors: Fukuyama Keiichi , Tsukihara Tomitake , Kishida Shunji , Katsube Yukiteru , Ishida Masayoshi , Hamasaki Takashi , Hatsuda Yuichi 
Published: July 2006

Abstract
The crystal and molecular structure of emericellin has been determined by the X-ray diffraction method. The compound crystallizes in the space group P\bar1, with a=8.667, b=14.665, c=9.157 Å, α=88.29, β=113.10, and γ=91.61°. The structure was refined to an R value of 0.086 for 2151 non-zero reflections. There are two intramolecular hydrogen bonds.
The Apparent Solvent Effect on the Fluorescence Efficiency of 9-Methyl-10-(chloromethyl)anthracene
Authors: Tanaka Fujio , Osugi Jiro 
Published: July 2006

Abstract
9-Methyl-10-(chloromethyl)anthracene (I) is immediately transformed into 9-methyl-10-(ethoxymethyl)-anthracene (II) in ethanol, and a very strong fluorescence of II is observed. While I is practically nonfluorescent, II fluoresces strongly in all solvents. These facts explain well a phenomenon misinterpreted by Melhuish as a remarkable solvent effect on the fluorescence efficiency of I.
The Reaction of Water Vapor and Carbon Vapor Produced by Laser Irradiation
Authors: Kim Pil Hyon , Taki Ko , Namba Susumu 
Published: July 2006

Abstract
The carbon vapor produced by laser irradiation was found to react with the water vapor. The main products were carbon monoxide, hydrogen, and acetylene, the last of which is not found in the water-gas. Acetylene is considered to be formed by the reaction of the C2 species of the carbon vapor.
The Redox Acidity Function, Ro(H) in Glycols and Their Aqueous Mixtures
Authors: Srinivas Rao V , Kalidas G 
Published: July 2006

Abstract
The variation of the redox acidity function, R0(H) , based on ferrocene redox couple has been studied at 25 °C as a function of solvent composition in diethylene glycol–water and ethylene glycol–water mixtures and compared with the H0 variation in these solvents. Further, the redox function for sulfuric acid has been reported upto 6 molal in 50 wt% diethylene glycol–water mixture as the solvent.
An Equilibrium Study of the Formation of Mixed-Ligand Nickel(II)-Aminopolycarboxylate Complexes
Authors: Kodama Mutsuo 
Published: July 2006

Abstract
The equilibria for the formation of 1 : 1 : 1 ratio mixed-ligand complexes of nickel (II)–NTA, HIDA, and –emylenediamine-N,N′-diacetate (EDDA) complexes with the glycinate (Gly), glutamate (Glut), and aspartate (Asp) anions were studied by determining the effects of the Gly, Glut, and Asp anions on the rates of the substitution reactions of nickel(II)–NTA, –HIDA, and –EDDA complexes with EDTA-OH or DTPA.
Kinetic Studies of the Electron Transfer Reaction in Iron(II) and Iron(III) Systems. VII. The Electron Transfer Reaction in Solid Dimethyl Sulfoxide
Authors: Wada Goro , Tabira Mikiko 
Published: July 2006

Abstract
The electron transfer reaction between Fe(II) and Fe(III) in dimethyl sulfoxide (DMSO) was investigated in the solid phase, and compared with the case in the liquid. In the temperature range between the freezing point (TM) and the eutectic point (TE), the reaction actually proceeds in the liquid phase where the reactants are concentrated due to the partial separation of pure DMSO solid, while below TE the reaction occurs in the solid phase at considerable reaction rates, with a lower activation energy, 4 kcal/mol, than that in the liquid. This indicates a different probable mechanism in solid DMSO.
Kinetics and Mechanism of the Reaction of Copper(II) with Hydroxylamine in the Presence of Bathocuproine Disulfonate
Authors: Imamura Taira , Fujimoto Masatoshi 
Published: July 2006

Abstract
The stoichiometry and the mechanism of the electron-transfer reaction of Cu(II) with hydroxylamine are investigated by measuring a fast complex formation of Cu(II) with bathocuproine disulfonate. The data are evaluated for the rate-determining step involving a radical species.
Organische Metallkomplexe. VIII. Notiz über die Kupfer(II)- raid Nickel(II)chelate der N,N′-Bis(2-phenylhydrazono-1-methyläthyliden)-α,ω-alkandiamine
Authors: Ohta Hiroshi , Kodera Yasushi , Mori Fumie , Koyama Mitsue , Ishibashi Sumie 
Published: July 2006

Abstract
Es wurden die Synthesen der neuen Ghelatbildner, N,N′-Bis (2-phenylhydrazono-1-methyläthyliden)-1,2-äthandiamin und -1,3-propandiamin sowie ihrer Kupfer(II)- und Nickel (II) chelate beschrieben.
A Convenient Method for the Preparation of Aryl and Alkyl Isothiocyanates Using Amines, Carbon Bisulfide, and a Grignard Reagent
Authors: Sakai Shizuyoshi , Fujinami Tatsuo , Aizawa Toshiyuki 
Published: July 2006

Abstract
The thermal decomposition of bromomagnesium N-aryl- or N-alkyl-N-bromomagnesio-dithiocarbamate (3), prepared in situ from amines, carbon disulfide, and a Grignard reagent, is a new and convenient method for the preparation of aryl or alkyl isothiocyanate.
Derivatives of 1,2-Dithiole-3-thione. XI. A Kinetic Study of the Reduction of N-Phenylsulfonyl Thione S-Imide with Halide
Authors: Tamagaki Seizo , Sakaki Keishi , Oae Shigeru 
Published: July 2006

Abstract
N-Phenylsulfonyl thione S-imide(I) was reduced with tetra-n-butylammonium bromide and iodide in the presence of trichloroacetic acid to yield benzotrithione and the sulfonamide in good yields. The kinetics of the reaction was performed, and the mechanism was discussed in detailed.
The Volatilization of Cadmium from Polyvinyl Chloride–Cadmium Mixtures on Heating
Authors: Tsunoda Ryoichi 
Published: July 2006

Abstract
The volatilization of cadmium from a PVC–cadmium stearate mixture on heating was studied by the X-ray diffraction analysis of the products volatilized, which were identified as CdCl2 in air metal Cd and CdCl2 in N2.
Trans-Gauche Equilibrium of 1,2-Dibromoethane and Dipole-interactions in Solutions
Authors: Kakimoto Masao , Fujiyama Tsunetake 
Published: July 2006

Abstract
The relative absorption intensities of the scissoring vibration bands of trans- and gauche-1,2-dibromoethanes were measured in pure liquid and in solutions of cis-1,2-dichloroethylene or tetrachloroethylene at various concentrations. The relative populations of the rotational isomers were determined from the intensity data. An attempt was made to describe quantitatively the observed concentration-dependence of the relative population on the basis of a semi-molecular theory of dipole-interaction. An equation is proposed for the averaged interaction energy of a molecule with its surrounding molecules, which is expressed in terms of the dipole moments and the polarizabilities of the solute and the solvent molecules.
Coagulation-dispersion and Precipitation-flotation Behavior of Bentonite and Cadmium-ion Flotation
Authors: Inakazu Toyono , Kobayashi Koichi , Sasaki Tsunetaka 
Published: July 2006

Abstract
The states of dispersion and the precipitation-flotation behavior of bentonite particles in an aqueous solution of hexadecyltrimethylammonium chloride (HTAC) were studied, and the effect of the HTAC on the coagulation and dispersion was discussed in connection with its adsorption on bentonite. The coagulation precipitation of bentonite began to occur at the ratio of the adsorbed amount to an exchange capacity, A⁄T, of about 0.05. It changed to coagulation flotation in the vicinity of A⁄T=1.2. The change was very sharp. The results suggest that the change from precipitation to flotation is produced by the adsorption of HTAC a little in excess of the first-layer formation, where a slight hydrophilization begins. It seems likely that, in the above state, the bubbles are easily accessible to bentonite particles because the agglomerates assume an open structure. The redispersion occurred near the point of sufficient hydrophilization of bentonite particles because of the adsorption of the second layer of cationic surfactant molecules.
The cis-trans Isomerization of 2-Butenes Photosensitized by Adsorbed Acetone
Authors: Otsuka Kiyoshi , Morikawa Akira 
Published: July 2006

Abstract
The anomalous acceleration of the rate of the cis-trans isomerization of 2-butenes is observed in the photosensitization of acetone adsorbed on porous Vycor glass. The anomaly is explained by means of a chain mechanism which is compatible with the triplet-triplet energy transfer mechanism. The chain carrier may be radicals formed by the dissociation of the lowest triplet acetone, resulting from the less efficient quenching of the triplet acetone by butenes at lower butene pressures. The preferential quenching of the acetone by the cis isomer to by the trans isomer of 2-butenes suggests that the geometrical factor plays a significant role in the reaction in the adsorption phase.
CNDO/2 Difference Electron Density Contours in Saturated Three-membered Rings
Authors: Ito Tetsuzo 
Published: July 2006

Abstract
Theoretical difference electron density contours in the NCC, CCC, and OCC ring planes of ethyleneimine quinone, cis-1,2,3-tricyanocyclopropane and tetracyanoethylene oxide molecules, respectively, were calculated by the CNDO/2 molecular orbital method. They are qualitatively in good agreement with the experimental contours, and have reproduced the most characteristic features of the observed electron distributions in the bent bonds in the three-membered rings. The theoretical difference contours in the three-membered ring planes of aziridine, cyclopropane and oxirane molecules have shown essentially the same bonding electron distributions as the corresponding contours in the more complex molecules mentioned above.
Electron Scavenging by Bromobenzene in the Radiolysis of Heptane, 1-Hexene and Their Mixtures
Authors: Baba Masatoshi , Fueki Kenji 
Published: July 2006

Abstract
A quantitative study has been made of electron scavenging by bromobenzene in the radiolysis of heptane, 1-hexene and their mixtures. Experimental data were analyzed using Schuler’s scavenging function. It has been found that the total ion yields are 4–5 G units in these liquids and the value of the reactivity parameter decreases with increasing fraction of 1-hexene. Further analysis of the data was made in terms of the exponential spatial distribution function for the electrons. A discussion is given to physical parameters derived from such analysis.
Chemical Reaction of Electron Donor–Acceptor System: A New Mechanism for the Tricyanovinylation Reaction of Some Aromatic Amines with Tetracyanoethylene
Authors: Nogami Takashi , Hasegawa Yoshiki , Shirota Yasuhiko , Mikawa Hiroshi 
Published: July 2006

Abstract
The tricyanovinylation reactions of several aromatic amines with tetracyanoethylene (TCNE) were investigated kinetically by observing the change of the absorbance of the charge-transfer (CT) band in 1,2-dichloroethane. The pseudo first order rate coefficient of the decay of the CT-complex (kobsd) was found to obey the relation, kobsd=kKDn⁄(1+KD) (K: association constant of CT-complex; D: initial concentration of donor molecule), where n=1 in N,N-diethylaniline (DEA)–TCNE and N,N-di-n-butylaniline (DBA)–TCNE systems and n=2 in N-methyl-N-ethylaniline (MEA)–TCNE system. Since the currently accepted mechanism for the tricyanovinylation reaction cannot explain the case of n=1, we have proposed a new reaction mechanism which can explain all the kinetic data reported hitherto. Two characteristic points are involved in the new mechanism, i.e., one is the unimolecular reaction of the CT-complex or the bimolecular reaction between reactants to form the σ-complex, and the other the decomposition of the σ-complex back to the component molecules. The reactions of MEA, DEA, and DBA with TCNE were discussed based on the new mechanism.
Pulse Radiolysis of Hg(CN)2 in Aqueous Solutions
Authors: Fujita Shin-ichi , Horii Hideo , Mori Toshiaki , Taniguchi Setzuo 
Published: July 2006

Abstract
The reduction of Hg(CN)2 in deaerated aqueous solutions was studied by the pulse radiolysis technique. Hg(CN)2 reacts with the eaq with k(eaq+Hg(CN)2)=(1.3±0.1)×1010 M−1 s−1 to yield a transient species of HgCN having an absorption maximum at 285 nm. Hg(CN)2 is also reduced by CO2− with k(CO2−+Hg(CN)2)=(3.4±0.2)×109 M−1 s−1. The extinction coefficient of HgCN at 285 nm was determined as (3.8±0.1)×103 M−1 cm−1. HgCN recombines with 2k=(3.4±0.5)×109 M−1 s−1 to produce another absorption species, assigned as (HgCN)2, in an unstable state. The decay rate of the dimer was accelerated by some additives, such as alcohols and sodium formate. Making use of a proposed mechanism, (HgCN)2→Hg(aq)+Hg(CN)2, the absorption coefficient of atomic mercury in water was evaluated as (2.8±0.1)×103 M−1 cm−1.
Electron Scavenging by Benzene Derivatives in Alcohol Glasses
Authors: Namiki Akira , Noda Masato , Higashimura Takenobu 
Published: July 2006

Abstract
Electron scavenging efficiencies by benzene derivatives in alcohol glasses were studied by employing gamma radiolysis at 77 K. Scavenging efficiencies, 1/[S]1⁄2, were quasi-linear with the adiabatic electron affinities (EA) of the acceptors and they increased as the solvation time of the trapped electron became long. Electron scavenging was explained as a tunneleing of the unsolvated electron; the pre-exponential factor in the tunneling rate was calculated by employing the Morse function developed by Wentworth et al. in the gas phase, which gave an EA dependence in accordance with the experimental results.
The Catalytic Action of TiO2 for the Isomerization of Butenes
Authors: Morishige Kunimitsu , Hattori Hideshi , Tanabe Kozo 
Published: July 2006

Abstract
The isomerization of 1-butene or cis-2-butene and the co-isomerization of cis-2-C4H8 and cis-2-C4D8 were carried out at 120 °C over TiO2 calcined in air. It has been found that induction period appeared and the ratio of cis-2-butene to trans-2-butene in the isomerization of 1-butene was unusually high (5–20). The double bond migration and cis-trans isomerization occurred by an intramolecular hydrogen transfer reaction and the kinetic isotope effect (kH⁄kD) was 4–5. The activity was completely or almost lost by poisoning with pyridine or nitric oxide. The isomerization was concluded to proceed by a π-allyl anion mechanism, where the cis-trans interconversion is highly restricted and the C–H bond cleavage is involved in the rate-determining step of the double bond migration. Main active sites were suggested to consist of both Lewis acid sites and basic sites (surface oxygen ion, O2−).
The Radiation Synthesis of Hydrogen Cyanide from the Nitrogen–ethylene System. The Effect of Fission-fragment Irradiation
Authors: Ikezoe Yasumasa , Sato Shoichi 
Published: July 2006

Abstract
Upon irradiation by (FF+n+γ), the G(HCN) value from the nitrogen-ethylene system increased with the rise in the pressure, while upon y and (n+γ) radiations it decreased. This pressure effect was explained in terms of the high concentration of the active species in the FF tracks. At a high pressure, Reaction (5) is considered to take place in the tracks;
&N_2^++e^-→2N\ ag5
\intertextAt low pressures, Reaction (6) predominates, as in the γ-ray radiolysis, over Reaction (5) even in the FF tracks,
&N_2^++C_2H_4→N_2+C_2H_4^+\ ag6
and nitrogen molecule cations do not contribute to the formation of hydrogen cyanide.
The Preparation and Absorption Spectra of the Cyanocarbonatotriammine-and Cyanooxalatotriammine-type Complexes of Cobalt(III)
Authors: Nakashima Shoji , Shibata Muraji 
Published: July 2006

Abstract
The complexes of the [CoCN(O–O)(N)3] type (O–O represents CO32− or C2O42−, and (N)3 represents three NH3, one NH3 plus one en, or one dien) have been prepared starting from the [Co(CO3)3]3− complex, and their characterization has been achieved on the basis of the absorption and PMR spectra. Among these, each of the fac(N) isomers of the carbonato complexes shows a shoulder in the second absorption band and no shoulder in the first absorption band. In contrast, each of the corresponding fac(N) isomers of the oxalato complexes shows no such shoulder in the second absorption band, but does show a shoulder in the first absorption band. The same phenomena have been found in the spectra of the trans(N)-[Co(O–O)(mda)(NH3)]− complexes (mda stands for the methyliminodiacetate ion).
Syntheses of Indolo[2,3-b]tropones and Benzo[b]-1-azaazulenes from 2-Hydrazinotropones
Authors: Nozoe Tetsuo , Sin Je-Kyun , Yamane Kameji , Fujimori Kunihide 
Published: July 2006

Abstract
The application of Fischer’s indole synthesis to cyclohexanone 2-troponylhydrazone gave 1,2,3,4-tetrahydroindolo[2,3-b]tropone (II), which was then dehydrogenated to indolo[2,3-b]tropone (III). 8-, 10-Isopropyl-, and 7-bromoindolo[2,3-b]tropone (XIIa–c) were also obtained by a similar method. The treatment of 2-troponylhydrazones of cycloheptanone and N-benzylpiperidone with dilute sulfuric acid or PPA gave 2,3-pentamethylenepyrrolo[2,3-b]tropone (XIII) and 2-benzyl-1,2,3,4-tetrahydrocyclohept[b]pyrido[3,4-d]pyrrol-6(5H)-one (XIV) respectively. The reaction of III with phosphoryl chloride or thionyl chloride yielded 8-chlorobenzo[b]-1-azaazulene (XV), which was subsequently converted into a hydrazino derivative (XVI). The oxidative decomposition of XVI with copper sulfate in acetic acid afforded benzo[b]-1-azaazulene (XVII).
The Structure of Polyvanadotungstates. II. The Crystal Structure of K7V5W8O4·12H2O
Authors: Nishikawa Keiko , Kobayashi Akiko , Sasaki Yukiyoshi 
Published: July 2006

Abstract
Crystals of K7V5W8O40·12H2O are cubic, with the space group of P\bar43m and with the cell dimension of a=10.62(1) Å. The structure was determined by the single-crystal X-ray diffraction technique. All the non-hydrogen atoms were located, and the final R value was 0.057. The V5W8O407− anion has the Keggin structure, with a central VO4 tetrahedron. The twelve outer metal positions are randomly occupied by four vanadium and eight tungsten atoms. A detailed discussion of the configuration isomers is impossible because of the orientational disorder. The present work, and the former X-ray structure determination of V2W4O194− show that polyvanado-tungstates can be regarded as substituted homologues of isopolytungstates: VnW6−nO19(n+2)− (n=1,2) has a hexanipbate-type structure, and VtVnWn−12O40(n+3)− (n=2,3,4), the Keggin structure, where Vt represents the central vanadium atom.
Chemical Vapor Growth of Titanium Diboride Whisker
Authors: Motojima Seiji , Sugimori Fumio , Takahashi Yasutaka , Sugiyama Kohzo 
Published: July 2006

Abstract
Titanium diboride whisker was grown by chemical vapor deposition from a gaseous mixture of TiCl4, BCl3, H2, and Ar. The relations between the growth conditions and the crystal morphologies were investigated. The predominant factors for whisker growth were found to be the substrate temperature and the kind of impurities painted on the substrate. The optimum temperature was determined as 1050–1070 °C where whiskers grew up to 250 μm in length and 0.1 to 1 μm in diameter for 30 min. Au, Pt, and Pd were found to be promissing impurities for whisker growth. From an observation of the droplet on whisker tip, the growth mechanism for the whiskers was supposed to be VLS mechanism. The form of whisker grown was tetragonal and hexagonal pillar, and the growth direction was determined as [100]direction.
Studies of the Ruthenium Complexes. XI. The Reaction Mechanism of the Base Hydrolysis of Halogenopentaammineruthenium(III) Complexes
Authors: Ohyoshi Akira , Sakamoto Hiroyuki , Makino Haruo , Hamada Keijiro 
Published: July 2006

Abstract
The base hydrolysis of halogenopentaammineruthenium(III) complexes, [RuX(NH3)5]X, (X=Cl, Br, and I), has been studied in a solution with a 0.03–0.2 M hydroxide ion concentration in order to clarify the reaction mechanism. Some deviations from the first-order rate plots were observed early in the reaction. By the analysis of these results, it was proved that the concentration change with time for each species participating in the reaction was expressed by a linear combination of two exponential functions. The reaction can be well accounted for by a mechanism involving SN2 CB and SN2 processes:
& [RuX(NH_3)_5]^2++OH^-\oversetk_1\undersetk_-1\ightleftarrows[RuX(NH_3)_4(NH_2)]^++H_2O
& [RuX(NH_3)_4(NH_2)]^++OH^-\oversetk_2\undersetH_2O→[Ru(OH)(NH_3)_5]^2++X^-+OH^-
& [RuX(NH_3)_5]^2++OH^-\oversetk_3→[Ru(OH)(NH_3)_5]^2++X^-
The rate constants, k1, k−1, k2, and k3, at 15 °C were determined to be 9.29×10−2 M−1 s−1, 2.65×10−2 s−1, 6.78×10−1 M−1 s−1, and 1.13×10−1 M−1 s−1 respectively for the chloropentaammine complex.
Thermal Dehydration Reactions of Bivalent Transition Metal Malonate Dihydrates in Solid State
Authors: Nagase Kenzo , Muraishi Kazuo , Sone Kozo , Tanaka Nobuyuki 
Published: July 2006

Abstract
The kinetics of the thermal dehydration reactions of MC3H2O4·2H2O(M=Mn(II), Fe(II), Co(II), Ni(II), and Zn(II)) were studied by the Freeman-Carroll and Coats-Redfern methods on the basis of the TG and DTG in nitrogen. The most reasonable reaction order for all the salts was found to be 2/3, indicating that the rate is controlled by the chemical process at a phase-boundary. This was also confirmed by the microscopic observations. The values of activation energy and frequency factor were 70–90 kJ mol−1 and 107–1010 s−1, respectively. The enthalpy changes for all the salts were determined to be 60–80 kJ mol−1 by the DSC measurements. The X-ray powder diffractograms, infrared absorption and diffuse reflectance spectra of the hydrates and anhydrous salts were also examined to obtain informations on their crystal and bonding structures.
Reactions of Vinyloxyboranes with Carbonyl Compounds, Nitriles, and Formates
Authors: Muraki Masayoshi , Inomata Katsuhiko , Mukaiyama Teruaki 
Published: July 2006

Abstract
A new vinyloxyborane derivative, Id, was found to be formed in reaction of phenyl di-n-butylthioboronite (II) with methyl vinyl ketone. In order to explore its utilization in organic synthesis, the reactivity of Id and other known vinyloxyboranes was variously examined. Id and Ie gave β-hydroxyketones (IVa–c, Va–d) in fairly good yields when they were allowed to react with carbonyl compounds. The reaction of Ia′ and Ib with nitriles, followed by hydrolysis, afforded β-iminothioates (VIa–c) and β-ketoesters (VIIa–d) respectively. It was also found that the borane (Ib) reacted with formates or formamides at room temperature to give ethyl α-formylhexanoate.
The Reaction of Alkyl Halides with Mercuric Thiocyanate in Tetrahydrofuran. The Solvent Incorporation and the Intermediacy of O-Alkyltetrahydrofuranram Ions.
Authors: Watanabe Nanao , Uemura Sakae , Okano Masaya 
Published: July 2006

Abstract
The reaction of alkyl halides with mercuric thiocyanate in tetrahydrofuran (THF) affords mainly the THF-incorporated products, R[O(CH2)4]nNCS and R[O(CH2)4]nSCN (mostly n=1 and 2), where the isomer ratios (N/S ratios) are nearly 1. The reaction of EtO(CH2)mBr (m=2–5) with mercuric thiocyanate in THF or n-Bu2O proceeds rapidly only in the case of m=4 to give EtO(CH2)4NCS and EtO(CH2)4SCN, the N/S ratio being also nearly 1, and gives EtNCS and EtSCN when m=5, while the reaction with potassium thiocyanate in DMF affords a good yield of EtO(CH2)mSCN (m=2–5) as nearly the only product. It is suggested that the titled reaction involves the initial formation of a five-membered oxonium ion, O-alkyltetrahydrofuranium ion, and a subsequent attack by XHg(SCN)2−.
Synthesis of d-Ribofuranosylpyrazolecarboxamides
Authors: Makabe Osamu , Nakamura Masakazu , Umezawa Sumio 
Published: July 2006

Abstract
Several carbamoylpyrazole-nucleosides were synthesized by fusion of 1-O-acetyl derivatives of ribofuranoses with pyrazole derivatives in the presence of bis(p-nitrophenyl) hydrogen phosphate as an acidic catalyst. NMR and UV spectral studies revealed the orientation in N-glycosylation of the substituted pyrazoles.