Synthesis,Crystal Structure and Herbicidal Activity of O,O＇-Diethyl-N-[2-（5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yloxy）-benzoxyl]-1-amino-benzyl phosphonate

The crystal structure of the title compound (C25H28N5O5P,Mr=509.49) has been determined by single-crystal X-ray diffraction.The crystal is of monoclinic,space group P21/c with a=13.0726(4),b=13.4513(4),c=15.103(1),β=93.650(1)°,V=2650.29(14)3,Z=4,Dc= 1.277 g/cm3,F(000)=1072,μ(MoKα)=0.147 mm-1,the final R=0.0748 and wR=0.1956 for 3186 observed reflections (I 2σ(I)).The fused triazolopyrimidine system ring is coplanar,the dihedral angles between the triazolopyrimidine and C(1)-C(3)-C(5) phenyl,the triazolopyrimidine and C(17)-C(19)-C(21) phenyl,and the two phenyl rings are 66.87,58.79 and 80.11o,respectively.Intramolecular N(5)-H(5A)…O(3) and intermolecular C(2)-H(2)…N(4),C(18)-H(18)…O(3),C(19)-H(19)…O(2) and C(24)-H(24C)…N(4) hydrogen bonds together with C-H…π interactions contribute to the stability of the structure and result in a three-dimensional framework.The preliminary bioassay indicates that the title compound exhibits moderate herbicidal activity against dicotyledonous plants (Brassica campestris L) at the concentration of 100 mg/L.     

Synthesis,Characterization and Crystal Structure of 3-o-Fluorophenyl-6-（4-decarboxydehydroabietyl）-1,2,4-triazolo[3,4-b]-1,3,4-thiadiazole

Three novel 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazoles were designed,synthesized and characterized by IR,NMR and APCI-MS.3-o-Fluorophenyl-6-(4-decarboxydehydroabietyl)-1,2,4-triazolo[3,4-b]-1,3,4-thiadiazole(6a,C28H31FN4S) was structurally determined by single-crystal X-ray diffraction.The crystal belongs to the orthorhombic system,space group P212121 with a=6.0153(14),b=12.2577(19),c=34.055(3),V=2511.0(7)3,Z=4,Mr=474.63,Dc=1.255Mg/m3,λ=0.71073 ,μ(MoKα)=0.160 mm-1,F(000)=1008,the final R=0.0555 and wR=0.1248 for 3094 observed reflections with I2σ(I).There are six rings in the crystal structure of the title compound.The dihedral angle between 1,2,4-triazole and 1,3,4-thiadiaole rings is 1.4o,and that between 1,2,4-triazole and benzene ring D 25.5o.     

Preparation,Single-crystal Structure and Antibacterial Activity of N-（（6-Bromine-2-methoxylquinoline-3-yl）benzyl）-3-morpho-line-N-（naphthalene-1-yl）propionamide

The halogenated hydrocarbon amination reaction between the original raw mate-rial N-((6-bromine-2-methoxylquinoline-3-yl)benzyl)-3-chlorine-N-(naphthalene-1-yl)propionamide and morpholine produces the target molecule N-((6-bromine-2-methoxylquinoline-3-yl)benzyl)-3-morpholine-N-(naphthalene-1-yl)propionamide (C34H32BrN3O3,Mr=610.54),and its structure was characterized by 1H NMR,IR,H RMS and X-ray single-crystal diffraction.This crystal is of triclinic system,space group P1 with a=9.315(2),b=10.3449(12),c=15.901(3),α=80.981(14),β=76.996(17),γ=74.917(13)°,V=1433.6(5)3,Z=2,Dc=1.414 g/cm3,F(000)= 632,μ(MoKα)=1.47 mm-1,the final R=0.0735 and wR=0.2457.In total,5585 independent reflections including 3727 observed ones with I 2σ(I) were collected.The dihedral angle between naphthyl and substituted quinolyl and that between phenyl and substituted quinolyl are 61.2(1) and 108.2(1)°,respectively.Through C-H…O and C-H…N hydrogen bonds among molecules,the whole molecule is stacked into a three-dimensional structure.In addition,π-π stacking among adjacent naphthalene rings makes the molecule more stable,and the morpholine ring adopts a chair conformation.The target molecule exhibits good antibacterial activity.     

Synthesis and Crystal Structure of 5,5-Dimethyl-2-(4-chlorophenyl)(3-hydroxy-5,5-dimethyl-2-cyclohexen-1-one-2-yl)methyl-3-(4-methoxyphenylamino)-2-cyclohexene-1-one

The title compound 5,5-dimethyl-2-(4-chlorophenyl)(3-hydroxy-5,5-dimethyl-2-cyclohexen-1-one-2-yl)methyl-3-(4-methoxyphenylamino)-2-cyclohexen-1-one has been synthesized,and its crystal structure was characterized by X-ray single-crystal diffraction. The crystal belongs to monoclinic,space group P21/c with a=9.4193(13),b=26.915(4),c=21.188(3),β =101.906(3)°,V =5256.2(13)3,Z =4,C60H68Cl2N2O8,Mr=1016.06,Dc=1.284 g/cm3,F(000)=2160,λ(MoKα)=0.71073,μ=0.182 mm–1,R=0.0530 and wR=0.1131 for 4128 observed reflections (I>2σ(I)). X-ray analysis reveals that there are two independent molecules in the unit and the cyclohexenone rings adopt different conformations. In addition,there are four intramolecular hydrogen bonds in the title molecule.     

Synthesis and Supramolecular Structure of a Novel :r-Extended TTF Derivative

A novel x-extended TTF derivative (C24H20N6S8, Mr=649.02) has been synthesized and characterized by IR,1H NMR and MS. The crystal structure was prepared by crystallization from CH2Cl2-MeOH. The crystal belongs to the monoclinic system, space group P21/c with a=5.465(5), b=26.835(5), c=10.180(5) A, β=101.929(5)°, V=1460.7(15) A3, Z=2, Dc=1.476 g/cm3,F(000)=668,μ=0.638 mm-1, the final R=0.0390 and wR=0.0586 for 1694 observed reflections with I > 2σ(I). The structure reveals planarity of the two dithiole tings, different from the boat-shaped structure usually found in neutral derivatives of TTF. The central ring of the benzene also adopts a planar conformation, while it is twisted from planarity of the two dithiole rings and forms a dihedral angle of 61.8°. The molecule exhibits a three-dimensional supramolecular architecture constructed through hydrogen bonds. In the molecular structure a noticeable feature can be found that there exist S…S interactions which further reinforce the 3D supramolecular framework.     

Synthesis,Crystal Structure and Antiproliferative Activity of 2-（（（5-（（（5,7-Dimethyl-[1,2,4]triazolo-[1,5-a]pyrimidin-2-yl）thio）methyl）-4-phenyl-4H-1,2,4-triazol-3-yl）thio）methyl）-4Hchromen-4-one Methanol Solvate

The novel crystal of the title compound 2-(((5-(((5,7-dimethyl-[1,2,4]triazolo-[1, 5-a]-pyrimidin-2-yl)thio)methyl)-4-phenyl-4H-1,2,4-triazol-3-yl)thio)methyl)-4H-chromen-4-one methanol solvate(C27H25N7O3S2, Mr = 559.66) has been prepared and its structure was determined by single-crystal X-ray diffraction. The crystal belongs to the monocline system, space group P21/c with a = 11.9879(9), b = 14.0743(10), c = 15.9706(11), β = 98.509(2)°, V = 2664.9(3)3, Z = 4, Dc = 1.395 g/cm3, F(000) = 1168, μ = 0.116 mm-1, MoKa radiation(λ = 0.71073), R = 0.0652, and wR = 0.1425 for 5220 observed reflections with I 2σ(I). X-ray diffraction analyses reveal that the molecule adopts a C-shape. The planes of the benzopyrone and triazolopyrimidine were nearly parallel to each other, with a dihedral angle of 1.21(3)°. Intramolecular and intermolecular hydrogen bonds together with π-π interations are found to exist in the structure. The results of MTT assay indicate that the title compound displays excellent antiproliferative activity against two human cancer cell lines.     

Analysis of Intra-and Intermolecular Hydrogen Bonds and Quantum Chemical Calculations on 1-(3-Fluorobenzoyl)-3-(4-trifluoromethylphenyl) thiourea

1-(3-Fluorobenzoyl)-3-(4-trifluoromethylphenyl)thiourea, C_(15)H_(10)F_4N_2OS, has been synthesized firstly and determined by single-crystal X-ray diffraction analysis. The title compound crystallizes in monoclinic system, space group C2/c with a = 31.87(3), b = 7.705(9), c = 12.591(14) ?, b = 106.06(2)°, V = 2971(6) ?~3, Z = 8, D_c=1.530 g·cm~(–1), F(000) = 1392, m = 0.266 mm~(–1), S = 1.06, the final R = 0.070 and w R(I 2s(I)) = 0.249. The crystal structure revealed that the carbonyl thiourea unit in the determined compound was mostly planar due in part to the formation of intramolecular N–H···O=C and C–H···S=C hydrogen bonds that form two S(6) rings. The intermolecular contacts of the crystal structure have been preformed based on the Hirshfeld surface and their associated 2D fingerprint plots. In the packing diagram of the synthesized compound, the C=S group formed two types of intermolecular hydrogen bonds by the H–N(C=O) group and the H–C of the phenyl ring, respectively, and they formed R2 2(8) and R_2~2(14) ring motifs, respectively. The crystal packing form was also stabilized by the intermolecular hydrogen bonds C–H···O(1–x, y, 0.5–z) with the R_2~2(10) ring motifs. In addition, supramolecular layers sustained by π-π stacking interactions(between the C(2)~C(7) rings with the C(10)~C(15) rings) are formed in the crystal structure of the title compound. The electronic and reactivity were assessed by the natural bond orbital(NBO) analysis in this study.     

Synthesis and Crystal Structure of 2,3,4,6-tetra-O-Acetyl-1-{4-chloro-3-[1-（4-ethoxyphenyl）-1-methylethyl]phenyl}-1-deoxy-β-D-glucopyranose

The title compound was synthesized and its crystal structure was determined by single-crystal X-ray diffraction.The crystal is of monoclinic system(C31H37ClO10,Mr = 605.06),space group P21 with a = 11.882(5),b = 10.106(5),c = 13.816(6),V = 1545.9(12)3,Z = 2,Dc = 1.300 g/cm3,F(000) = 640,μ = 0.179 mm-1,the final R = 0.0430 and wR = 0.0595 for 4960 observed reflections(I > 2σ(I)).The title compound was confirmed to be a β-anomer by single-crystal X-ray diffraction and 1H NMR.The proximal benzene ring is nearly orthogonal to the glucopyranoside ring,and the two benzene rings are also almost orthogonal to each other.Four non-classical intermolecular hydrogen bonds observed in the crystal lattice help to stabilize the crystal.     

Synthesis,Crystal Structure and Insecticidal Activity of N-(pyridin-2-ylmethyl)-1-phenyl-1,4,5,6,7,8-hexahydrocyclohepta[c]pyrazole-3-carboxamide

The title compound N-(pyridin-2-ylmethyl)-1-phenyl-1,4,5,6,7,8-hexahydrocyclohepta[c]pyrazole-3-carboxamide 5(C_(21)H_(22)N_4O, Mr = 346.42) has been synthesized and structurally characterized by IR, ~1H NMR, ~(13)C NMR, H RMS and single-crystal X-ray diffraction. The crystal crystallizes in monoclinic system, space group P21/n with a = 8.668(2), b = 22.236(4), c = 9.539(2) ?, β = 108.68(3)°, V = 1786.4(7) ?3, Z = 4, Dx = 1.288 g/cm~(-3), F(000) = 736, μ(Mo Ka) = 0.649 mm~(-1), the final R = 0.0354 and w R = 0.0933 with 3234 observed reflections with I 2σ(I). The benzene and pyrazole rings are nearly coplanar with a dihedral angle of 50.977(46)°. The dihedral angle between the central pyrazole and pyridine rings is 11.688(46)°. No classical hydrogen bonds were found in the molecules. Two adjacent molecules in crystal packing of compound 5 were linked by two intramolecular hydrogen-bonding interactions C(15)–H(15)···O(1) to generate a stable structure. Compound 5 had weak insecticidal activity against the diamondback moth(Plutella xylostella), but exhibited good activity against cotton bollworm(Helicoverpa armigera).     

Synthesis and Crystal Structure of Methyl 3-（5- Bromo-1-ethyl-1H-indole-3-carbonyl）aminopropionate

Methyl 3-(5-bromo-1-ethyl-1H-indole-3-carbonyl)aminopropionate has been syn-thesized by the acylation of 5-bromo-3-trichloroacetylindole with β-alanine methyl ester,followed by alkylation with ethyl iodide,in 82.6% yield.Its crystal structure was gotten and determined by X-ray diffraction method.The crystal is of monoclinic,space group P2 1 /c with a=11.7927(8),b=14.9342(8),c=9.0060(5),β=101.558(6)°,V=1553.93(16)3,Z=4,D c=1.510 g/cm 3,λ=0.71073,μ(MoKα)=2.656 mm-1,M r=353.22 and F(000)=720.The structure was refined to R=0.0401 and wR=0.0825 for 1704 observed reflections with I > 2σ(I).In the crystal structure,intermolecular N(2)-H(2)···O(1) hydrogen bond and weak intermolecular bonds (C(1)-H(1) O(1) and C(10)-H(10B) O(2)) are formed,and π-π stacking also exists.     

Cooperative C-H…O H-bonds in ''Bay Area'' and Crystal Structure of 1-(4-Methylphenyl)- 3-(4-methoxyphenyl)-2-propene-1-one

The title compound (C17H16O2, Mr = 252.30) crystallizes in the monoclinic system, space group P21/c with a = 11.5763(14), b = 11.0321(11), c = 11.5094(13) (A),β = 114.581(3)°, V= 1336.7(3) (A)3, Z = 4, Dc = 1.254 g/cm3, μ(MoKa) = 0.081 cm-1 and F(000) = 536.00. The final R and wR are 0.0527 and 0.1285, respectively for 3058 observed reflections (I ＞ 2σ(I)). In the title molecule, two phenyl rings are rotated oppositely with respect to the central part C(1)-C(2)=C(3)- C(4) (plane 3) and the dihedral angle between them is 14.8°. The phenone O(1) atom deviates from plane 3 by 0.291(A). In the crystal the molecules form H-bond chains of R21(6) and R21 (5) types similar crystals are also presented.     

Synthesis,Bioactivity and Crystal Structure Analysis of Diisopropyl[（4-cyanopyrazol-3-ylamino）（2-hydroxyl-phenyl） methyl]phosphonate

The title compound,diisopropyl[(4-cyanopyrazol-3-ylamino)(2-hydroxylphenyl) -methyl] phosphonate was synthesized by the addition reaction of diisopropyl phosphite and N-(4-cyanopyrazole-3-yl) -2-hydroxylphenyl-imine. Its structure was characterized by IR,1H NMR,elemental analysis and single-crystal X-ray diffraction. The crystal belongs to the triclinic system,space group P1 with a = 9.1840(13) ,b = 9.2278(13),c = 12.1952(17) ,α = 93.846(2) ,β = 90.947(2) ,γ = 111.289(2) °,V = 959.9(3) 3,Dc = 1.309 g/cm3,Z = 2,μ(MoKa) = 0.173,F(000) = 400,the final R = 0.0414 and wR = 0.1196 for 2985 observed reflections(I > 2σ(I)) . The pyrazole and benzene moieties are approximately coplanar in each case. The dihedral angle between planes 1 and 2 is 82.99°. The crystal structure is stabilized by three intermolecular hydrogen bonds of O(1) -H(1) …O(2) ,N(2) -H(2) …N(3) and N(2) -H(2) …O(1) . Preliminary bioassay indicated that the title compound possessed antiviral activity to some extent.     

Molecular and Crystal Structure of 1-(4-Chlorophenyl)-3-(2-nitrophenyl)-1-triazene

1　ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｈａｓｂｅｅｎｒｅｐｏｒｔｅｄｔｈａｔ1,3ｄｉｐｈｅｎｙｌｔｒｉａｚｅｎｅｓｈｏｗｓａｎｔｉｔｕｍｏｕｒａｃｔｉｖｉｔｙｃｏｍｐａｒａｂｌｅｔｏｔｈａｔｏｆ3,3ｄｉｍｅｔｈｙｌ1ａｒｙｌｔｒｉａｚｅｎｅｓ.1,3Ｄｉａｒｙｌｔｒｉａｚｅｎｅｓｃａｎａｃｔａｓｐｒｏｄｒｕｇｓ,ｏｒ‘ｃａｒｒｉｅｒｓ’ｏｆｄｉａｚｏｎｉｕｍｃｏｍｐｏｕｎｄｓ,ｓｉｎｃｅｔｈｅｙｕｎｄｅｒｇｏｈｙｄｒｏｌｙｓｉｓｔｏｆｏｒｍａｒｙｌｄｉａｚｏｎｉｕｍｃｏｍｐｏｕｎｄｓ[1,2].Ａｎｄｓｏｍｅｏｎｅｈ…     

Synthesis and Crystal Structure of Diethyl 5-Acetoxy-3-（4-chlorophenyl）- 4,5-dihydroisoxazol-5-yl-5-phosphonate

1INTRODUCTION Isoxazole derivatives are an important class of heterocycles as intermediates for natural product synthesis and building blocks for constructing new molecular systems[1,2].In addition,isoxazole deriva-tives have been long targeted in synthetic inves-tigation for their known biological activities and pharmacological properties such as hypoglycemic,analgesic,anti-inflammatory and anti-bacterial acti-vities[3~6].Therefore,the isoxazolines and isoxazoles with phosphonate group ar…     

Synthesis and Crystal Structure of the Optical Activity of （Z）-Nitromethylene Neonicotinoid Analogue

A novel (Z)-nitromethylene neonicotinoid analogue (C23H27Cl2N5O4·2H2O) (II) with optical activity has been synthesized, the structure was characterized by elemental analysis, IR and 1H NMR spectra, and the (Z)-configuration was confirmed by single-crystal X-ray diffraction. The crystal belongs to triclinic, space group P1 with a = 7.4638(3), b = 12.6232(5), c = 15.2990(6), α = 71.907(1), β = 89.397(2), γ = 80.314(1)°, V = 1349.28(9)3, Z = 2, Dc = 1.340 g/cm3, μ = 0.286 mm-1, Mr = 544.43, F(000) = 572, S = 1.056, R = 0.0801 and wR = 0.2366 for 4998 unique reflections with 3012 observed ones (I > 2σ(I)). In the crystal, the dihedral angle between the pyridine and 4-Cl-phenyl rings is 58.13°. Intermolecular O–H···O, C–H···O and C–H···Cl hydrogen bonds involving water molecules stabilize the crystal structure.     

Synthesis and Crystal Structure of (E)2-(3'-Bromo-5'-chloro-salicylidene amino)-4-methyl Pyridine

A new Schiff base compound,2-bromo-4-chloro-6-[(4-methylpyridin-2-ylimino)me-thyl]phenol(C13H10BrClN2O),has been synthesized by the condensation of equimolar 3-bromo-5-chlorosalicylaldehyde and 4-methylpyridin-2-ylamine in a methanol solution.The compound Was characterized by elemental analysis,IR spectra,and single-crystal X-ray diffraction.The crystal belongs to the monoclinic system,space group P21 with a=6.048(3),b=14.063(7),c=7.623(4)(A),β=97.703(7)°,Z=2,V=642.5(6)(A)3,Dc=1.683 g/cm3,Mr=325.59,λ(MoKa)=0.71073(A),μ=3.395 mm-1,F(000)=324,R=0.0370 and wR=0.0662.A total of 3879 reflections were collected,of which 1970 with,I＞2σ(I)were observed.As expected.the molecule adopts a trans configuration about the C=N double bond.The benzene and pyridine rings are nearly coplanar(mean deviation from the combined plane is 0.031(3)(A)),with their dihedral angle of 3.3(3)°.The preliminary biological tests show that the compound has excellent antibacterial activities.     

Crystal Structure of (1R,4R;1S,4S)2-Amino-3-Cyano-1,4-Diphenyl-2-Cyclopentene-1-ol

1INTRODUCTIONIntheearly1970'sthreegroupsofinvestigatorsL,~,'foundthatlow-valenttita-nium,preparedbythereactionofstrongreducingagentswithtitaniumtrichlorideortitaniumtetrachlorideintetrahydrofuran,canabstractoxygenfromketonesoraldehydes,leadingtotheforma-tionofolefins.Theinterestinthereactioninducedbylow--valenttitaniumreagentsisincreasingandalargenumberoffunctionalgroupscanbereduceds4-6).Recent-ly,wefoundthatthetitlecompoundisObtainedbycy-cllzatlonreactionof(3--oxo-1,3-diphenyl)propyl-pro…     

Molecular and Crystal Structure of 1-(4-Chlorophenyl)- 3- (4-Nitrophenyl)- 1-Triazene

１　ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｈａｓｂｅｅｎｒｅｐｏｒｔｅｄｔｈａｔ１,３－ｄｉｐｈｅｎｙｌｔｒｉａｚｅｎｅｓｈｏｗｓａｕｔｉｔｕｍｏｒａｃｔｉｖｉｔｙｃｏｍｐａ－ｒａｂｌｅｔｏｔｈａｔｏｆ３,３－ｄｉｍｅｔｈｙｌ－１－ｄｉａｒｙｌｔｒｉａｚｅｎｅｓ．１,３－ｄｉａｒｙｌｔｒｉａｚｅｎｅｓｃａｎａｃｔａｓｐｒｏ－ｄｒｕｇｓ,ｏｒｃａｒｒｉｅｒｏｆｄｉａｚｏｎｉｕｍｃｏｍｐｏｕｎｄｓ,ｓｉｎｃｅｔｈｅｙｕｎｄｅｒｇｏｈｙｄｒｏｌｙｓｉｓｔｏｆｏｒｍａｒｙｌｄｉａｚｏｎｉｕｍｃｏｍｐｏｕｎｄｓ〔１…     

Asymmetric Synthesis and Crystal Structure of （-）-N-[（3R）-3-Cyclohexyl]-3-phenylpropananoyl]bornane-10,2-sultam

The title compound (-)-N-[(3R)-3-cyclohexyl]-3-phenylpropananoyl]bornane-10,2sultam (C 25 H 35 NO 3 S,M r=429.60),a derivative of camphorsultam,crystallizes in the monoclinic space group P2 1 /c with a=10.3301(7),b=19.4040(13),c=11.8106(8),β=100.5580(10)°,V=2327.3(3) 3,Z=4,D c=1.226 g/cm 3,λ=0.71073,μ(MoKα)=0.165 mm-1 and F(000)=928.X-ray diffraction analysis reveals that the six-membered ring of sultam shows a boat form (Fig.1).The planes constructed by (C(4),C(5),C(6),C(7)) and (C(7),C(8),C(9),C(4)) form a dihedral angle of 69.5°.The C(1)-C(2)-C(3) plane forms dihedral angles to the aforementioned planes of 89.8(1) and 85.9(3)°,respectively.And molecules are linked via hydrogen bonding (C-H···N/O) interactions.