Structure and Biological Activities of 2-（ 1,3-Dithiolan-2-ylidene）-1-phenyl-2- （ 1,2,4-triazol-1 -yl ） ethanone

In order to find leading compounds with an excellent fungicidal activity, the title compound 2-（ 1,3-dithiolan-2- yl-idene）-1-phenyl-2-（ 1,2,4-tfiazol-1-yl） ethanone was synthesized according to the biological isosterism and its structure was confirmed by means of IR, MS, ^1 H NMR and elemental analysis. The single crystal structure of the title compound was determined by X-ray diffraction. The preliminary biological test shows that the synthesized compound exhibits some biological activities.     

Asymmetric Synthesis of （R）- and （S）-Moprolol

A simple and effective procedure for the enantioselective synthesis of （R）- and （S）-moprolol was described. The key step was the asymmetric synthesis of enantiopure （R）- and （S）-guaifenesin, which were synthesized from enantioenriched （R）-3-chloro-l,2-propanediol and （S）-epichlorohydrin via kinetics of hydrolysis resolution of racemic epichlorohydrin by chiral Salen-Co^Ⅲ complex. The e.e. values of both the optical compounds were above 98%, and the chemical structures of the target compounds were confirmed by ^1H NMR, ^13C NMR, IR, and MS.     

Synthesis, Dimeric Crystal Structure, and Biological Activities of N- （ 4-Methyl-6-oxo-1,6-dihydro-pyrimidin-2-yl ） -N＇- （ 2-trifluoromethyl-phenyl ） -guanidine

The title compound, N-（4-methyl-6-oxo-1,6-dihydro-pyrimidin-2-yl）-N＇-（2-tritluoromethyl-phenyl）-guanidine, was synthesized and its structure was confirmed by using IR, MS,^1H NMR, and elemental analysis. The single crystal structure of the title compound was determined by X-ray diffraction. The preliminary biological test showed that the synthesized compound has a weak herbicidal activity.     

Synthesis, Structure and Biological Activities of 2- （4-Met hoxybenzoyl ）-N-phenyl- 2- （ 1,2,4-triazol- 1-yl ） thioacetamide

The title compound, 2-(methoxybenzoyl)-N-phenyl-2-(1,2,4-triazol-l-yl) thioacetamide was synthesized by several reactions from 4-methoxyacetophenone, triazole and phenyl isothiocyanate. The structure was identified by elemental analysis, ^1H NMR, MS and IR. The single crystal structure of 2-(methoxybenzoyl)-N-phenyl-2-(1,2,4-triazol-l-yl)thioacetamide was determined withX-ray diffraction. The preliminary bioassays show that the title compound exhibits weak antifungal activities and plant-growth regulatory activity.     

Synthesis and Crystal Structure of 1,4,7,10-Tetrakis （2-（（4-hydroxy）phenoxy）ethyl）-1,4,7,10- tetraazacyclododecane

A novel molecule tetra-N-alkylation of cyclen （1,4,7,10-tetraazacyclododecane）, 1,4,7,10-tetrakis（2-（（4-hydroxy）phenoxy）ethyl）-1,4,7,10-tetraazacyclododecane 2, was synthesized and structurally characterized by single-crystal X-ray diffraction. The molecule turned into chiral helical compound crystals grown from EtOH by slow diffusion at room temperature and three of the four hydroquinone groups of the benzene ring formed a g-electron-rich cavity by C-H…π stacking interaction. The crystal belongs to the monoclinic system, space group P21/C with a = 13.9192（9）, b = 13.2871（6）, c = 22.1894（15）A^°, β = 91.4600（10）°, V = 4102.5（4）A^°3, Z = 4, Dc = 1.219 g/cm^3, C40H52N4O8, Mr = 752.89, F（000） = 1616,μ = 0.088 mm^-1, MoKa radiation （λ = 0.71073）, R = 0.0578 and wR = 0.1389 for 5588 observed reflections with I 〉 2σ（I）. Moreover, compound 2 was characterized with ^1H NMR, ^13C NMR, IR spectra and MS.     

Facile Synthesis of Enantiomerically Pure 1-（5-Bromo-2-chlorophenyl）-1-（4-ethoxyphenyl）ethane

A facile 7-step procedure for the synthesis of enantiomerically pure 1-（5-bromo-2-chlorophenyl）-1-（4-ethoxyphenyl）ethanes[（R）-2 and（S）-2] that started from （5-bromo-2-chlorophenyl）（4-ethoxyphenyl）methanone 3 was developed.The key step was the resolution of 2-（5-bromo-2-chlorophenyl）-2-（4-ethoxyphenyl）acetic acid 6 by crystallizations of its L-and D-menthyl esters 7 and 8 from petroleum ether to give optically pure enantiomers 9 and 10,respectively.The absolute configurations of the products were unambiguously determined by single-crystal X-ray diffractions of four key intermediates,9,10,13 and 14.This procedure is characterized by inexpensiveness,scalability and ability to produce two individual enantiomers of a diarylethane with unambiguously determined absolute configurations and high enantiomeric purities.     

Synthesis, Crystal Structure and Biological Activities of 2- （4-Fluorophenyl） -2-oxo-1-（1H-1,2,4-triazol-1-yl） ethyl morpholine-4-carbodithioate

The title compound, 2-（ 4-fluorophenyl ） -2-oxo-1-（ 1H-1, 2,4-triazol-1-yl ） ethyl morpholine-4-carbodithioate, was synthesized and its structure was confirmed by means of IR, MS, 1 H NMR and elemental analysis. The single crystal structure of the title compound was determined by X-ray diffraction. The preliminary biological test showed that the synthesized compound possesses some biological activities.     

Synthesis,Crystal Structure and Biological Activities of N-（4-Cyanopyrazole-3-yl）- α-（3,5-difluorophenyl）- O,O-diisopropyl- α-aminophosphonate

The title compound has been synthesized by the addition reaction of N-（4-cyanopyrazole-3-yl）-3,5-difluorophenyl-imine and diisopropyl phosphate. Its structure was confirmed by means of IR, ^1H NMR and elemental analysis. The single-crystal structure of the title compound was determined by X-ray crystallography. The compound crystallizes in monoclinic, space group C2/c with a = 18.9959（14）, b = 9.2212（7）, c = 22.1108（16）A^°, β= 90.1540（10）°, V = 3873.0（5） A^°^3, Dc = 1.366 g/cm^3, Z = 8, μ = 0.185, F（000） = 1664, and the final R = 0.0503 and wR = 0.1539 for 2996 observed reflections （I 〉 2σ（I））. The results demonstrate that the dihedral angle between the pyrazole and benzene rings is 105.5°, and there is a full delocalized pyrazole system with sp^2 hydridization of N（3）. The crystal structure is stabilized by two intermolecular hydrogen bonds of N（1）-H（1）…O（3） and N（3）-H（3A）…N（4）. The preliminary biological test shows that the title compound has a moderate antifungal activity.     

Synthesis and Crystal Structure Analysis of 2-（3,5-Di-tert-butyl-2-hydroxyphenyl）-2-（3,4- dimethylphenyl） Acetic Acid Dimethylamine Salt

A new compound 2-（3,5-di-tert-butyl-2-hydroxyphenyl）-2-（3,4-dimethylphenyl） acetic acid dimethylamine salt （[NH2（CH3）2][C24H31O3]） was synthesized and structurally determined. It is of monoclinic system, space group P21/c with a = 14.731（2）, b = 10.1185（10）, c = 17.065（2） A^°, β = 98.293（10）° ,Z = 4, V = 2517.0（6）A^°^3, Dc = 1.091 g/cm^3, F（000） = 904 and Mr= 413.58. The dihedral angle defined by two benzene rings is 98.23°.     

Synthesis, Crystal Structure and Biological Activities of N＇ - （ 4-Methoxybenzylidene ） -2- （ 1H-1, 2,4- triazol-1-yl） acetohydrazide

The title compound, N‘-( 4-methoxybenzylidene ) -2-( IH-1, 2,4-triazol-1-yl ) acetohydrazide, was synthesized and its structure was confirmed by means of IR, MS,^1H NMR and elemental analysis. The single crystal structure of the title compound was determined by X-ray diffraction. The preliminary biological test shows that the synthesized compound has a low antifungal activity.     

Synthesis,Bioactivity and Crystal Structure Analysis of 2-（Benzo [d]isothiazol-3-yloxy）-N-（3-cyano-l-（4- fluorophenyl）-lH-pyrazol-5-yl） Acetamide

A novel benzisothiazolin-3-one derivative, 2-（benzo[d]isothiazol-3-yloxy）-N-（3- cyano-l-（4-fluorophenyl）-lH-pyrazol-5-yl） acetamide （8）, was synthesized from the initial compound benzo[d]isothiazol-3（2H）-one （BIT） 1 and 4-fluoroaniline 3. The structure of the target compound 8 was determined by elemental analyses, IR and 1H NMR. The single crystals of intermediate compound 6 and the target compound 8 were obtained and determined by X-ray diffraction analysis. The preliminary biological activity was also evaluated and the results showed tile target compound exhibited a good anti-microbial activity.     

Nitrogen-rich 6-（3,5-Dimethylpyrazol-1-yl）-3-（2,4,6-trinitroanilino）-1,2,4,5-tetrazin： Synthesis, Crystal Structure and Thermal Property

6-（3,5-Dimethylpyrazol-1-yl）-3-（2,4,6-trinitroanilino）-1,2,4,5-tetrazin （1） has been synthesized and characterized by ^1H NMR, MS, elemental analysis, infrared spectra and thermal analyses. The crystal structure was determined by X-ray diffraction method. 1 is crystallized in P21/c space group of monoclinic crystal system, and exhibits good physical properties, such as high densities （〉 1.55 g·cm^-3） and good thermal stabilities （Td〉220 ℃）. The intrermolecular hydrogen bonds construct the P- and M-helices from organic molecules and may contribute to the high melting points.     

Synthesis,Crystal Structure,Characterizationand Quantum Chemical Studies on 1N-Acetyl-3-（2,4-dichloro-5-fluorophenyl）-5-（p-methyl-phenyl）-2-pyrazoline

1N-Acetyl-3-（2,4-dichloro-5-fluoro-phenyl）-5-（p-methyl-phenyl）-2-pyrazoline has been synthesized and characterized by elemental analysis, IR, UV-Vis and X-ray single-crystal diffraction. Ab intio calculations have been carded out for the compound by using both B3LYP and HF methods at the 6-31G^＊ basis set. The calculated results show that the predicted geometry can well reproduce the structural parameters. The electronic absorption spectra calculated by B3LYP/6-31G^＊ method are approximate to the experiments and the Natural Bond Orbital （NBO） analyses suggest that the above electronic transitions are mainly assigned to n→π^＊ and π→π^＊ transitions. CIS-HF/6-31G^＊ method is not suitable to predict the electronic spectra for the title compound. The calculation of the second order optical nonlinearity was carded out, giving the value of molecular hyperpolarizability equal to 2.194^＋ 10^-30 esu. On the basis of vibrational analyses, the thermodynamic properties of the compound at different temperature have been calculated, revealing the correlation between C p, m^0, S m^0, H m^0 and temperature.     

Synthesis,Crystal Structure and Prosperities of 10-（4,5-Dibenzylthio- 1,3-dithiol-2-ylidene）anthracen-9（10H）-one

The title compound 10-（4,5-dibenzylthio-1,3-dithiol-2-ylidene）anthracen-9（10H）- one （C31H22OS4） has been synthesized, and its crystal structure was prepared by crystallization from CH2Cl2-MeOH. The crystal belongs to the triclinic system, space group Pi with a = 10.9758（3）, b = 11.4241（4）, c = 11.7460（2）A^°, α = 62.379（2）, β = 81.227（3）, γ = 80.321（2）°, Mr = 538.73, V = 1281.69（7） A^°^3, Z = 2, Dc = 1.396 g/cm^3, F（000） = 560,μ = 0.395 mm^-1, the final R = 0.0291 and wR = 0.0739. The molecular structure is severely distorted from planarity. The central ring of anthraquinone moiety adopts a boat conformation, while the two outer benzene rings are tilted in the opposite direction to form a dihedral angle of 23.65°. The photocurrent generation was measured and an anodic photocurrent response was obtained. The electronic spectrum was studied by using TDDFr method on the basis of optimized geometries with B3LYP method. The obtained results are in good agreement with the experimental values.     

DNA Cleavage Promoted by Cu^2＋ Complex of N,N＇-Bis（2-aminoethyl）-2,6-pyridinedicarboxamide

The interaction of Cu^2＋ complex of N,N＇-bis（2-aminoethyl）-2,6-pyridinedicarboxamide （BAP） with DNA was studied by agarose gel electrophoresis analysis. The results indicate that the BAP-Cu^2＋ complex can promote the cleavage of phosphodiester bond of supercoiled DNA at physiological condition, which is 3.2 × 10^6 times higher than DNA natural degradation. A hydrolytic cleaving mechanism through the cooperation of copper ions and functional amino groups was proposed.     

Non-isothermal Decomposition Kinetics of [Cu（en）2H2O] （FOX-7）2·H2O

The thermal behavior and non-isothermal decomposition kinetics of [Cu（en）2H2O]（FOX-7）2·H2O （en=ethylenediamine） were studied with DSC and TG-DTG methods.The kinetic equation of the exothermal process is dα/dt=（10^17.92/β）4α^3/4exp（-1.688×10^5/RT）.The self-accelerating decomposition temperature and critical temperature of the thermal explosion are 163.3 and 174.8 ℃,respectively.The specific heat capacity of [Cu（en）2H2O]（FOX-7）2·H2O was determined with a micro-DSC method,with a molar heat capacity of 661.6 J·mol^-1·K^-1 at 25 ℃.Adiabatic time-to-explosion was also estimated as 23.2 s.[Cu（en）2H2O]（FOX-7）2·H2O is less sensitive.     

Synthesis and Structure of a POMs-based 3D Zeolike Ionic Crystal, {[Co（dpdo）2（H2O）2（CH3CN）]2（SiMo12O40）（H2O）2}n

A POMs-based 3D zeolike ionic crystal 1, {[Co（dpdo）2（CH3CN）（H2O）2]2（SiMo12O40）- （HEO）2}n （dpdo = 4,4＇-bipyridine-N,N＇-dioxide）, was constructed via self-assembly by embedding Keggintype [SiMo12O40]^4- polyanions within the intercrystalline voids as pillars and structurally characterized. The crystal structure was determined by single-crystal X-ray diffraction. The crystal is of triclinic, space group P1 with a = 11.430（3）, b = 12.242（3）, c = 14.279（3）A, α = 106.196（4）,β = 94.316（4）, γ = 98.294（3）°, V = 1884.5（7）A^3 Z = 1, C44H50N10O54CoEMo12Si, Mr = 2880.17, Dc = 2.538 g/cm^3, p = 2.484 mm^-1,F（000） = 1388, the final R = 0.0383 and wR = 0.1096 for 7753 observed reflections with I 〉 2σ（I）. Flack factor is 0.22（3）. Compound 1 is a pillar-layered framework with the [SiMo12O40]^4- anions linearly located on the square voids between the 2D bilayers which are formed by the dpdo ligands and cobalt（II） ions.     

Unexpected Synthesis of 2, 2＇-[1-（4-Methoxyphenoxy）propane-2, 2-diyl]bis（5-methoxy-3-methylbenzofuran）

A new bisbenzofuran analogue Ⅶ was achieved unexpectedly in one step procedure from 1-（4-methoxyphenoxy）acetone Ⅰ by using Amberlyst 15 resin as catalyst in excellent yield. The structure was elucidated by spectroscopy analysis including ^1H-NMR, ^13C-NMR, DEPT, ESI-MS, element analysis.     

Synthesis and Structural Characterization of 1,4-Di（2-methoxyphenyl）-2,5-piperazinedione

A new derivative of 2,5-piperazinedione, 1,4-di（2-methoxyphenyl）-2,5-piperazinedione （I）, was synthesized by the cyclocondensation reaction of N-2-methoxyphenyl chloroacetamide, and its structure was characterized by elemental analysis, IR, ^1H NMR and single crystal X-ray diffraction method. The crystal belongs to monoclinic system, space group P21/c with unit cell dimensions a=0.56934（10） nm, b=1.3880（2） nm, c=1.00329（17） nm, β= 90.376（3）°, V= 0.7928（2） nm^3, Z=2, Dc = 1.367 g·cm^-3,μ = 0.98 cm^-1, R and wR being 0.0606 and 0.1564 respectively for 1549 unique reflections with 1247 observed reflections [I〉2σ（I）]. The molecule has a crystallographically imposed symmetry center. The three rings in the molecule are each coplanar with their attached groups, excluding methyl H atoms and the H atoms attached to the piperazinedione ring, while the whole molecule is not planar, with dihedral angles of 74.7（1）° between the piperazinedione and each of the two aromatic rings. The crystal structure is stabilized by van der Waals and dipole-dipole forces.     

Synthesis,Structure Analysis,and Antitumor Activity of （R）-2,4-Dioxo-5-fluoro-l-[1-（methoxycarbonyl） Ethylaminocarbonylmethyl]-1,2,3,4-tetrahydropyrimidine

A new dipeptide compound, （R）-2,4-dioxo-5-fluoro-1-[1-（methoxycarbonyl） ethylaminocarbonylmethyl]-1,2,3, 4-tetrahydropyrimidine （5-FUAPM）, has been synthesized and identified by means of elemental analysis, IR, ^1H NMR and ^13C NMR spectra. The single crystal of compound 5-FUAPMoDMF was also obtained and characterized by DSC-TGA techniques. The crystal belongs to orthorhombic space group P212121 with the cell parameters： a= 0.4740（7） nm, b= 1.923（3） nm, c= 1.9229 nm, a=β=y=90°, V= 1.753 nm^3, Z=4, Dc= 1.312 g/cm^3, Mr=346.32, F（000）=728 and u=0.111 mm^-1. The final R and wR are 0.1378 and 0.2862, respectively. The result of the biological test showed that the compound 5-FUAPM has certain antitumor activities.