bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and Surface Acidity of MeAPO‐5 Molecular Sieves
Authors: Yang Sze‐Ming , Wu Shiaw‐Tzong , Lin Shiow‐Shyong 
Published: June 2015

AbstractMetal substituted aluminum phosphate molecular sieves, MeAPO‐5 (Me = Co, Mn, Fe(II), Fe(III), and Mg) were synthesized and characterized with X‐ray diffraction and scanning electron microscopy. The acidity was determined by temperature programmed desorption of ammonia, Desorption peaks at around 200°C were observed for all the MeAPO samples studied. Additional desorption peaks at around 300°C were found in MnAPO‐5, CoAPO‐5, and MAPO‐5. MnAPO‐5, CoAPO‐5, and MAPO‐5 also show good activities toward the cracking reaction of cumene at 350°C, while Fe(II)APO‐5 and Fe(III)APO‐5 show some activity at 500°C. The order of the cracking activity correlates with the presence of strong acidic sites in MnAPO‐5, CoAPO‐5, and MAPO‐5 as indicated by the TPD of ammonia.
Synthesis of Furanoid Natural Products
Authors: Liu Wan‐Hwa , Wu Hsien‐Jen 
Published: June 2015

AbstractFuranoid natural products, 1‐ipomeanol(17), 4‐ipomeanol(7), 1,4‐ipomeadiol(10) and ipomeanin (9) were synthesized from the intermediate compound (5) which was obtained by the photoaddition of furan with cyclopentanone followed by isomerization of the photoadduct(3).
The Alkaloid of Cananga Odorata (I), Isolation of A New Base, Ushinsunine N‐Oxide
Authors: Yang Tsang‐Hsiung , Huang Wen‐Yen 
Published: June 2015

AbstractA new aporphine alkaloid was isolated from the stem bark of Cananga odorata Hook. f. et Thomson (Annonaceae). The structure of this alkaloid has been established as ushinsunine N‐oxide (6aS, 7R) (1) on the basis of spectroscopic evidences and by chemical transformation.
Preliminary Results on the Crystal and Molecular Structure of Native and Mutant Aspartate Carbamoyltransferase at Neutral pH
Authors: Lu Tian‐Huey , Young Ti‐Sheng , Schachman Howard , Kim Sung‐Hou 
Published: June 2015

AbstractThe cell dimensions are a=b=131.2, c=198.5 Å, and α= β =90°, γ = 120° for both the wild and the mutant types of aspartate transcarbamoylase (ATCase) crystallized at pH=7.0. The space group is R32. Although the mutant and wild forms of ATCase show large differences in enzyme activity and chemical reactivity, yet they are isomorphous in structure.One asymmetric unit of ATCase contains a catalytic subunit, molecular weight 34,000 daltons, and a regulatory subunit, molecular weight 17,000. There are 310 amino acids in the catalytic subunit and 162 amino acids plus zinc in the regulatory subunit. The whole ATCase is a hexamer and consists of six molecules of catalytic and regulatory subunits. The primary structure study of this enzyme shows that the mutant form has a single substitution of aspartic acid in place of glycine at position 128 in the amino acid sequence of the catalytic chains. In most part of the sequence, the regulatory and catalytic chains of mutant and wild forms of ATCase are in similar conformations.(2Fo‐Fc) syntheses displayed with computer graphics using the FRODO program, were applied to the reflection data from both mutant and wild types. A stereoview of certain regions displayed on PS300 graphics shows significant differences between the wild and mutant types of ATCase.
Thermodynamics of Ion‐Association of NaClO4 in Aqueous‐Methanol and Aqueous‐Glycerol Using Conductance Measurements
Authors: Emara Mostafa M. , Shehata Hassan A. , El Nkhaily Sayed H. 
Published: June 2015

AbstractThe conductance of NaClO4 at (25–45)°C in methanol‐H2O, and glycerol‐H2O mixtures in a concentration range up to 10−2 M has been measured. The association constant, KA, values have been determined, where the conductometric data were analysed by a M S X computer using the Fuoss‐Aprano method. The KA values for NaClO4 in methanol‐H2O are higher than in glycerel‐H2O mixtures, Also KA values increase as the proportional of methanol or glycerol increases in mixture. The thermodynamic parameters ΔH°, ΔG°, and ΔS° were also calculated. It is obvious that the entire process of the ionic association in those systems are endothermic ones. The Walden products, Λoη were calculated for all systems investigated.
Cyclic Voltammetric and Morphological Studies of Polyaniline
Authors: Yang Sze‐Ming , Lin Tsair‐Sheng 
Published: June 2015

AbstractCyclic voltammograms and morphology of polyaniline were studied under various synthetic conditions and in various protonic acid media. The effect of protonic acid is not remarkable. The cyclic voltammogram and morphology depend on the synthetic conditions. The anodic peak potential at 0.14 V versus SCE in the cyclic voltammogram is pH independent. The anodic peak potential at 0.7 V versus SCE (pH=1) is pH dependent. By comparing the range of pH and oxidation potential of the conductive form, we propose that the conductive species which exists in the potential range between the first and the second peak in cyclic voltammogram is the radical cation.
The Diels‐Alder Reaction of Dienes Derived from Substituted 3‐(Phenyl‐Thio)‐3‐Sulfolenes
Authors: Chou Shang‐Shing P. , Liou Shy‐Yeon , Tsai Chung‐Ying 
Published: June 2015

AbstractSubstituted 3‐(phenylthio)‐3‐sulfolenes (3) and (4) are good precursors for 2‐(phenylthio)‐1,3‐butadienes (5) and (6). The Diels‐Alder reaction of the dienes derived from (3) and (4) with various dienophiles was studied. It was found that heating of sulfolenes (3) with methyl propiolate and N‐phenylmaleimide afforded the Diels‐Alder adducts of (5) directly and with complete regio‐ and stereospecificity. The same reaction with methyl vinyl ketone gave a mixture of endo and exo addition products. If sulfolenes (3) were first converted to the dienes (5) using lithium aluminum hydride and then reacted with methyl vinyl ketone in the presence of anhydrous zinc chloride, the stereoselectivity could be improved. Sulfolenes (4) also underwent cycloreversion/cycloaddition with methyl acrylate, methyl vinyl ketone, and N‐phenylmaleimide, but gave mostly the double bond‐isomerized cycloaddition products. The regiochemistry of cycloaddition was delicately dependent on the dienophiles used.
Synthesis of Certain S‐Triazole and s‐Triazolo[3,4‐B] 1,3,4‐Thiadiazole Derivatives of Expected Pharmacological Activity
Authors: Eisa H. M. , El‐Emam A. A. , Moustafa M. A. , El‐Kerdawy M. M. 
Published: June 2015

AbstractReaction of the newly prepared 3‐(2‐thienyl)‐4‐amino‐s‐triazole‐5‐thione (I) with different alkyl kalides and aromatic aldehydes afforded the corresponding thioethers and arylidene derivatives (II and III), respectively. Attempt ring closure of (I) with acetic anhydride produced the unexpected triacetyl derivative (IV). The synthesis of certain 3‐(2‐thienyl)‐6‐substituted‐s‐triazolo[3,4‐b] 1,3,4‐thiadiazoles (V and VII) was described. IR, NMR and mass spectral analyses of the prepared compounds were discussed.
Preparation and Characterization of High‐Tc YBa2Cu3O7‐X Superconductors by Means of Gelation of Metal Dicarboxylate Complexes
Authors: Liu Ru‐Sie , Chang Chau‐Ting , Wu Pin‐Tien 
Published: June 2015

AbstractThe superconductors YBa2Cu3C7‐x have been prepared via gelation of metal dicarboxylate complexes. Physical measurements such as XRD, Tc, and Xac on these ceramics indicate consistently that a better superconducting behaviors were found than that obtained from previously reported oxalate process.
Preparation of Poly(p‐Phenylene), Poly(m‐Phenylene), and Poly(2,5‐Thienylene) Via Electron Transfer from Aryl Grignard Reagents to 2,3‐Dichloropropene
Authors: Luo Fen‐Tair 
Published: June 2015

AbstractThree polymers including poly(p‐phenylene), poly(m‐phenylene), and poly(2,5‐thienylene) were synthesized in good yields from the corresponding aryldimagnesium bromide with two equiv of 2,3‐dichloropropene. The polymerization process involving electron transfer from the Grignard reagent to 2,3‐dichloropropene is proposed.
The Diels‐Alder Reaction of 2,3‐Disulfur‐Substituted 1,3‐Butadienes
Authors: Chou Shang‐Shing P. , Sun Der‐Jen 
Published: June 2015

AbstractThe 2,3‐disulfur‐substituted 1,3‐dienes (1) can be readily prepared from their stable 3‐sulfolene precursors (2) by thermal extrusion of SO2. The Diels‐Alder reaction of diene (1) with several dienophiles has been studied. The substituent effect on the reactivity and regioselectivity follows the order of PhS >PhSO >PhSO2. Lewis acid can greatly increase the regioselectivity of this reaction. The diene (1c), bearing a strong electron‐withdrawing sulfonyl group, also reacted as a dienophile.
The 1,3‐Dipolar Cycloadditions of 3‐Arylsydnone‐4‐Carbonitrile Oxides with Nitriles
Authors: Yeh Mou‐Yung , Pan I‐Horng , Chuang Che‐Ping , Tien Hsien‐Ju 
Published: June 2015

Abstract3‐Arylsydnone‐4‐carbonitrile oxides (2), which are generated in situ by thermal dehydrochlorination of the corresponding hydroximic acid chlorides (1), undergo 1,3‐dipolar cycloadditions with sydnone‐4‐carbonitriles (6) to give 3‐aryl‐4‐[5‐(3‐arylsydnonyl)‐1,2, 4‐oxadiazol‐3‐yl] sydnones (9). These nitrile oxides (2) also react with alkyl‐ and arylnitriles to give 1,3‐dipolar cycloaddition products.
A Convenient Method for the Preparation of Nitriles from Aldehydes and Aldoximes
Authors: Yeh Mou‐Yung , Tien Hsien‐Ju , Tung Ching‐Hsuan , Hwang Chi‐Ching , Wu Tian‐Shung 
Published: June 2015

AbstractNitriles were prepared from their corresponding aldehydes or aldoximes with the Vilsmeier reagent in a one‐pot reaction or without another solvent at room temperature in 74‐98% yields.
Encapsulation and Prolonged Release Behaviour of W/O/W Type Multiple Emulsions
Authors: Lin Tsui‐Hua , Lin Shan‐Yang 
Published: June 2015

AbstractW/O/W type multiple emulsions were prepared by two step emulsification procedures using an oily lymphographic agent, lipiodol, as an inner oil phase and Pluronic F‐68 as a hydrophilic emulsifier contained in the outer aqueous phase. Span 80, Pluronic L‐64 and HCO‐60 were used as emulsifiers incorporating them into the inner oil phase. The phase volume of the inner and outer aqueous phases and the yield of the w/o/w type multiple emulsions were studied. The dissolution behaviour of the w/o/w type multiple emulsions were determined by a dialysis method employing cellulose tubing. The effect of emulsifier type and the amount of HCO‐60 on the stability and prolonged release behavior of the w/o/w type multiple emulsions with or without lecithin, was also examined. The results indicate the HCO‐60 is a better emulsifier than Span 80 or Pluronic L‐64. Its use improves the stability and the prolonged release behavior of w/o/w type multiple emulsions.
Spectrophotometric Determination of Iron and Cobalt in Super Alloys
Authors: Tsai Suh‐Jen J. , Jong Yih‐Ling 
Published: June 2015

AbstractThe quantitative analysis of iron and cobalt in super alloys has been studied. 1,‐10‐Phenanthroline and nitroso‐R salt provide the chromophores for iron(II) and cobalt(II), respectively. The possibility of applying these photometric methods to a relatively complex substance, such as a super alloy, has been evaluated on the bases of precision and accuracy. The absorbance characteristics of metal complexes and the possible interference from foreign ions have also been carefully investigated. The presence of a high concentration of Ni results in a reducation of the amount of 1,10‐phenanthroline available for the formation of ferroin complexes while Mo does not have this effect. The analytical methods have been applied to the super alloys, Inconel 718, Hastelloy X, and Inconel X‐750. The modified 1,10‐phenanthroline photometric method and the standard nitroso‐R salt photometric method give high accuracy and good precision. This illustrates the analytical applicability of these reagents to super alloys.
Voltammetric Study of Ferrocene/Ferricinium Ion Redox Reactions in Acetonitrile
Authors: Fann Yang‐Cheng , Hao Hsieh‐Sui , Kapoor R.C. 
Published: June 2015

AbstractCyclic voltammetric and differential pulse voltammetric characteristics of the oxidation reaction of ferrocene in acetonitrile solvent have been evaluated using a glassy carbon indicator electrode. The redox couple ferrocene/ferricinium ion approaches thermodynamic reversibility in acetonitrile medium in only a low concentration range.
Organotransition‐Metal Complexes of Multidentate Ligands 6. Electronic and Steric Influences on the Formation of η2‐Acyl Complexes
Authors: Shiu Kom‐Bei , Lee Li‐Yun 
Published: June 2015

AbstractThree new η2‐acyl complexes, TMo(CO)2(η2‐COR) (T = Tp', Tp'; R= Me, Bun; Tp' = hydridotris(3,5‐dimethyl‐pyrazol‐1‐yl)borate; Tp' = hydridotris(3,4,5‐trimethylpyrazol‐l‐yl)borate) prepared from the corresponding alkyl iodides, RI, and the anions, TMo(CO)−3. The preparation of Et4N+Tp Mo(CO)3− is also described. Using solution IR spectra to monitor the reactions between RI and TMo(CO)3−, it was found that Tp'Mo(CO)2(η2‐COMe) was formed more readily than Tp'Mo(CO)2(η2‐COMe) which was obtained more easily than Tp'Mo(CO)2(η2‐COBun). This finding suggests that the mechanism is probably an ionic substitution rather than a radical mechanism. The different times required for the complete conversion from the anions to TMo(CO)2(η2‐COR) is rationalized in terms of the electronic and steric influences of T and RI.
Preparation and Conductivity of Benzophenone‐Iodine‐Alkali Iodide Crystals Grown from Methanol
Authors: Wang Chi‐Ming , Wang Su‐Fen , Chang Hua 
Published: June 2015

AbstractPolyiodide complexes of benzophenone (B) with iodine (I) and alkali iodide (MI, M = Na, K, Rb or Cs) have been prepared from methanol for the first time. The crystals of these complexes (abbreviated BIMI) are in the shape of hexagonal prisms with golden luster sides and black cross sections. BIMI complexes exhibit semiconductive behavior from 250 to 310 K with activation energies of 0.6 to 0.8 eV. Under an applied dc field at room temperature, the longitudinal conductivity of BIMI crystals is in the order of 10−6 Scm−1 and does not decrease over a period of half an hour, indicating no ionic conductivity in these complexes. In contrast, significant ionic conductivity is observed for benzophenone complexes grown from chloroform. It is concluded that the solvent molecules play an important role in determining the electrical behavior of the resulting benzophenone complexes. The results of conductivity and resonance Raman spectroscopic studies on the entire methanol series of BIMI complexes suggest that a common conduction pathway is probably provided by the polyiodide chains in this new series of benzophenone complexes.
Angular Distribution of the Multipole and Multiphoton Photofragmentation of Molecules
Authors: Chiu Ying‐Nan 
Published: June 2015

AbstractThe effect of higher‐order photo‐excitation on the angular distribution of photo‐dissociated molecular fragments is studied. A general formalism is derived that will cover non‐linear as well as linear polyatomic molecules and will permit comparison of the processes of different orders. Some of the higher‐order processes, e.g., magnetic dipole and electric quadrupole, will give rise to azimuthal‐angle (Φ) besides polar‐angle (θ) dependence of the fragments. Using a molecule of D3h, Symmetry as an example, a comprehensive study is made of all possible excitations allowed by symmetry in this point group for one‐photon electric/magnetic dipole and three‐photon electric‐dipole transitions. Plane wave approximation is used for the relative motion of the random and non‐rotating molecules which dissociate instantaneously with a velocity large compared with thermal motion. These basic angular factors may be used in future extensions to rotating and vibrating molecules and to time‐delayed dissociations and to vibronically excited fragment states, etc.
Transition Metal Complexes of Azo‐8‐Hydroxyquinoline Derivatives as Antimicrobial Agents
Authors: Awad Ibrahim M.A. , Aly Aref A.M. , Abdel Hafez Aly A. , Hassan Kh. M. 
Published: June 2015

AbstractSome New azo sulphonamide derivatives containing 8‐hydroxyquinoline moiety and their complexes with some transition metal ions vz. Fe+3, Co+2, Ni+2, Cu+2, and Hg+2 have been prepared and characterised. The stereochemistry as well as the type of bonding around the metal ions were determined on the basis of microanalysis, IR and UV‐VIS spectra, conductivity and magnetic moment measurements; the thermal behaviour of the complexes was also studied. The metal ions coordinate exclusively to the 8‐hydroxyquinoline moiety. The biological activity of the complexes was tested against a number of bacteria. Chelation of the metal ions to the ligands induces a remarkable increase in their antimicrobial activity.
Selective Synthesis of 1‐Alkyl‐2‐(Phenylsulfonyl)‐1,3‐Butadienes
Authors: Chou Shang‐Shing P. , Tsai Chung‐Ying , Sun Chung‐Ming 
Published: June 2015

AbstractSelective synthesis of the title compounds from the corresponding sulfenyldienes is described.
Additional Constituents of Hypericum Subalatum
Authors: Chen Ming‐Tyan , Kuoh Yu‐Ping , Wang Chao‐Hsiung , Chen Chiu‐Ming , Kuoh Chang‐Sheng 
Published: June 2015

AbstractThe whole herb of Hypericum subalatum Hayata contains three flavonoids, caffeic acid esters, a pyranoxanthone, and three xanthines, in addition to the previously reported xanthonolignoids. Among these compounds, 2,7‐dihydroxy‐3,4‐dimethoxyxanthone has not been described in the literature before. The co‐occurrence of xanthone derivatives and flavonoids in this plant is of chemotaxonomic significance.
Analysis of Triorganotin Compounds by High‐Performance Liquid Chromatography with Reverse‐Pulse Amperometric Detection
Authors: Whang Chen‐Wen , Tsai Wen‐Li 
Published: June 2015

AbstractHigh‐performance liquid chromatography (HPLC) coupled with the reverse‐pulse amperometric (RPA) detection method has been developed for the analysis of triorganotin compounds in aqueous solutions. The major advantage of RPA vs. conventional amperometric detection is its ‘in situ’ elimination of interference from dissolved oxygen in the chromatographic eluent; therefore, no extra chemicals or apparatus are required for oxygen removal. With a Partisil‐10 SCX column and an eluent of methanol/0.01 M sodium acetate buffer (70:30, pH 5.5), the four triorganotins, viz., trimethyl‐, triethyl‐, tripropyl‐, and tributyltin, can be totally separated. Detection by RPA was performed with a static dropping mercury electrode with an initial potential of −1.15 V and a final potential of +0.15 V. The absolute detection limit (S/N = 3) ranged from 12 ng of tributyltin (as tin) to 0.3 μg of trimethyltin (as tin). Applications of the method to the analysis of trace tributyltin in marine antifoulant leachate and sea water are described.
Preparation and Superconductivity of a Series of Bi2CaSr2‐XBaxCu2O8+δ
Authors: Wang Men‐Hour , Kao Huey‐Chuen I. 
Published: June 2015

AbstractBy means of the addition of Ba into the Bi‐Ca‐Sr‐Cu‐O 2122 system, a series of Bi2CaSr2‐xBaxCu2O8+δ (0 ≤ × ≤ 2) quinary metal oxides were prepared by the citrate route and by the conventional powder reaction method. The samples prepared by the former method have better properties than the latter. It was found that 5 was not equal to zero for all of them and that it increased with decreasing Tc. Two phases were indentified in the oxides containing all five metal elements. One is the Bi‐Ca‐Sr‐Cu‐O 2122 phase, the other is a new insulating phase which probably contains Bi‐Ca‐Ba‐Cu‐O with undetermined stoichiometry. Superconductivity was found in those samples for which × ≤ 1.50 with their Tc onsets between 93–78 K by resistivity measurements. Superconductivity decreased monotonically with increasing x. However, residual resistance was found in those samples for which 1.00 ≤ × ≤ 1.50, The Meissner effect appears in the samples where × ≤ 1.00 with Tc onsets between 88–80 K. For x = 1.75 and 2.00, the samples were semiconductors with resistivities of 6.66 × 102 and 6.96 × 103 Ω cm at 290 K, and activation energies of 0.109, and 0.298 eV, respectively.
Synthesis and Reactions of a Stable Precursor to Dienes Containing Both Silicon and Sulfur Substituents
Authors: Chou Shang‐Shing P. , Tsai Chung‐Ying , Sun Chung‐Ming 
Published: June 2015

Abstract3‐(Phenylthio)‐4‐(trimethylsilyl)‐3‐sulfolene (2) was readily prepared by chlorosulphenylation‐dehydrochlorination of 3‐(trimethylsilyl)‐3‐sulfolene (4b). Treatment of 2 with n‐butyllithium at −105 °C followed by an alkylating agent gave only C5 alkylation products 6 demonstrating the stronger carbanion stabilizing ability of phenylthio group than that of trimethylsilyl group. 2‐(Phenylthio)‐3(trimethylsilyl)‐1,3‐butadiene (3a) was readily prepared by thermal extrusion of sulfur dioxide from 2. Selective oxidation of 3a with MCPBA gave the sulfinyl (3b) and sulfonyl (3c) derivatives. The Diels‐Alder reactions of 3a‐c were studied, and the regiocontrolling power of the substituents follows the order PhS >PhSO ∼ PhSO2 >Me3Si.
Thermodynamics of Copper(II) Complexes of Diamino Diamides in Aqueous Solution
Authors: Chao Min‐Shiun , Chung Chung‐Sun 
Published: June 2015

AbstractThe equilibria occurring in aqueous solutions of N,N′‐bis(β‐carbamoylethyl)ethylenediamine, N,N′‐bis(β‐carbamoylethyl)trimethylenediamine, N,N′‐bis(β‐carbamoylethyl)‐1,2‐propylenediamine, and N,N′‐bis(β‐carbamoylethyl)‐2‐hydroxytrimethylenediamine with protons and copper(II) ions as well as the deprotonation reactions of the copper (II) complexes of these four ligands have been studied by calorimetry at T=25.0°C and I=0.10 mol dm−3 (NaClO4). The enthalpy changes and the entropy changes for these reactions are reported and discussed.
Fluorescence Probe Studies of Ionic Micelles in Concentrated Salt Solutions
Authors: Chen Jin‐Ming , Su Tzu‐Min , Mou Chung Yuan 
Published: June 2015

AbstractWe have investigated the effect of salt concentration and temperature on the average aggregation number and micro‐polarity of the interior of micelles of sodium dodecyl sulfate (SDS). sodium tetradecyl sulfate (STDS) and lithium dodecyl sulfate (LiDS). The transient fluorescence decay of micelle‐solubilized pyrene has been measured and analyzed. An exponent weighted average aggregation number <n>e was obtained by this technique. For SDS and STDS in NaCl solution, <n>e increases as the temperature is lowered or salt concentration is increased <n>e increased from ∼ 50 to ∼ 250 over [NaCl] = 0 to 0.8 M. Due to the strong counterion binding of lithium in the micellar solution, the LiDS micelle is much, smaller and does not increase appreciabily even at [LiCl] =0.8 M. From the fluorescence spectrum fine structure of pyrene and the fluorescence decay of the monomer and excimer, we can understand the local polarity and the water penetration to the interior of the micelle upon addition of salts and with changing temperature. The interior of the micelle becomes more nonpolar as the salt concentration is increased and the temperature is lowered. A complete kinetic analysis of the time–dependence of the fluorescence is given. The kinetic analysis is in agreement with the results reached by fluorescence spectral analysis.
Synthesis and Some Chemical Behaviour of Certain Substituted Thiosemicarbazides
Authors: El‐Kerdawy M. , Eisa H. , Barghash A. , Marouf A. 
Published: June 2015

AbstractThree new thiosemicarbazides (1 a‐c) were prepared from N‐[4‐phenyl‐5‐(2‐thienyl)‐1,2,4‐triazol‐3‐yl]mercaptoacetohydrazide. Reaction of (1 a‐c) with the appropriate phenacyl bromide afforded thiazoline derivatives (2 a‐i) whereas their reaction with chloroacetic acid or maleic anhydride gave the corresponding thiazolidine derivatives (3 a,b) and (4 a,b). Cyclodesulfurization of (1 a‐c) with DCCD in toluene yielded 5‐substituted‐amino‐1,3,4‐oxadiazoles (5 a,b), while their dehydration with PPA gave the corresponding 5‐substituted‐amino‐1,3,4‐thiadiazoles (6 a‐c). Six representative compounds were tested for their in‐vitro antimicrobial activity against some pathogenic microorganisms, some of them were proved to be active.
A New Synthesis of α‐Myrcene
Authors: Tso Hsi‐Hwa , Chou Ta‐Shue , Lai Yu‐Ling 
Published: June 2015

Abstractα‐Myrcene was synthesized from 4‐[(1‐hydroxy‐4‐methyl)‐4‐pentenyl]‐2‐sulfolene (3) by a sequence of mesylation, elimination, Michael addition, desulfurization, and thermolysis.