The reaction of Zn（ClO4）2·6H2O with 3,3＇-bis（2-benzimidazolyl）-2,2＇-dipyridine （L） gave a mononuclear zinc（Ⅱ） complex： [ZnL2]（CIO4）2·2DMF·4H2O, which was structurally characterized by EA, ...The reaction of Zn（ClO4）2·6H2O with 3,3＇-bis（2-benzimidazolyl）-2,2＇-dipyridine （L） gave a mononuclear zinc（Ⅱ） complex： [ZnL2]（CIO4）2·2DMF·4H2O, which was structurally characterized by EA, IR, UV, ^1H NMR, fluorescence spectrum and single-crystal X-ray diffraction. The crystal （C54H54Cl2N14O14Zn, Mr = 1259.38） belongs to the monoclinic system, space group C2/c with a = 20.874（2）, b = 14.9953（16）, c = 20.462（3）A,β= 101.553（2）°, V= 6274.8（13） A, Z= 4, Dc= 1.333 g/cm^3, F （000） = 2608,/a（MoKcr） = 0.548 mm 1, R = 0.0682 and wR = 0.1931 for 4984 observed reflections with I 〉 2σ（I）. The Zn（Ⅱ） is four-coordinated in a slightly distorted tetrahedral geometry through four N atoms from four benzimidazole units of two ligands. In the crystal lattice, the [ZnL2]2^＋ cations are linked to each other by extensive intermolecular hydrogen bonds between nitrogen atoms of benzimidazole rings, water and DMF molecules.展开更多
A non-solvent synthesis procedure for the preparation of 2,2′-bipyrimidine, 4,4′,6,6′-tetramethyl-2,2′-bipyrimidine and 4,4′,6,6′-tetraphenyl-2,2′-bipyrimidine in high yields was developed using fresh copper po...A non-solvent synthesis procedure for the preparation of 2,2′-bipyrimidine, 4,4′,6,6′-tetramethyl-2,2′-bipyrimidine and 4,4′,6,6′-tetraphenyl-2,2′-bipyrimidine in high yields was developed using fresh copper powder as catalyst.展开更多
A facile and highly efficient method has been developed for the synthesis of unsymmetrical N-aryl-2,2-di（1H-indol-3-yl）acetamide derivatives by regioselective Friedel-Crafts alkylation of the N-aryl-2-hydroxy-2-（1H...A facile and highly efficient method has been developed for the synthesis of unsymmetrical N-aryl-2,2-di（1H-indol-3-yl）acetamide derivatives by regioselective Friedel-Crafts alkylation of the N-aryl-2-hydroxy-2-（1H-indol-3-yl） acetamide derivatives with various indoles catalyzed by 2 mol/L H2SO4 at room temperature in ashort reaction time, the yield was up to 94%.展开更多
This paper aims to study low dimensional cohomology of Hom-Lie algebras and the qdeformed W（2, 2） algebra. We show that the q-deformed W（2, 2） algebra is a Hom-Lie algebra. Also,we establish a one-to-one correspon...This paper aims to study low dimensional cohomology of Hom-Lie algebras and the qdeformed W（2, 2） algebra. We show that the q-deformed W（2, 2） algebra is a Hom-Lie algebra. Also,we establish a one-to-one correspondence between the equivalence classes of one-dimensional central extensions of a Hom-Lie algebra and its second cohomology group, leading us to determine the second cohomology group of the q-deformed W（2, 2） algebra. In addition, we generalize some results of derivations of finitely generated Lie algebras with values in graded modules to Hom-Lie algebras.As application, we compute all αk-derivations and in particular the first cohomology group of the q-deformed W（2, 2） algebra.展开更多
4-Hydroxycinnamic acid derivatives,including ferulic acid (FA) (1),sinapic acid (SA) (2) and caffeic acid (CA) (3),are widely distributed in the plant kingdom,and undergo oxidative cross-coupling leading to the corres...4-Hydroxycinnamic acid derivatives,including ferulic acid (FA) (1),sinapic acid (SA) (2) and caffeic acid (CA) (3),are widely distributed in the plant kingdom,and undergo oxidative cross-coupling leading to the corresponding dehydrodimers,trimers and even higher oligomers in plants. In order to evaluate the antioxidative ability of these 4-hydroxycinnamic acid derivatives and their oligomers,we synthesized 8-8'-bis-lactone-dimers (8-8'-DiFA (4),8-8'-DiSA (5) and 8-8'-DiCA (6)),as well as a new trimer (7),by the reaction of the corresponding monomers (1-3) with Ag2O in methanol,and assayed their free radical-scavenging activity by the reaction with 2,2-diphenyl-1-picrylhydrazyl radical (DPPH·). It was found that CA (3) and 8-8'-DiCA (6) bearing o-dihydroxyl groups exhibited significantly higher radical-scavenging activity than those bearing no such groups,and oxidative coupling of CA (3) resulted in remarkable enhancement in the activity.展开更多
基金Supported by the National Natural Science Foundation of China (No. 20471054) the Henan Innovation Project for University Prominent Research Talents (No. 2005 KYCX021)
文摘The reaction of Zn（ClO4）2·6H2O with 3,3＇-bis（2-benzimidazolyl）-2,2＇-dipyridine （L） gave a mononuclear zinc（Ⅱ） complex： [ZnL2]（CIO4）2·2DMF·4H2O, which was structurally characterized by EA, IR, UV, ^1H NMR, fluorescence spectrum and single-crystal X-ray diffraction. The crystal （C54H54Cl2N14O14Zn, Mr = 1259.38） belongs to the monoclinic system, space group C2/c with a = 20.874（2）, b = 14.9953（16）, c = 20.462（3）A,β= 101.553（2）°, V= 6274.8（13） A, Z= 4, Dc= 1.333 g/cm^3, F （000） = 2608,/a（MoKcr） = 0.548 mm 1, R = 0.0682 and wR = 0.1931 for 4984 observed reflections with I 〉 2σ（I）. The Zn（Ⅱ） is four-coordinated in a slightly distorted tetrahedral geometry through four N atoms from four benzimidazole units of two ligands. In the crystal lattice, the [ZnL2]2^＋ cations are linked to each other by extensive intermolecular hydrogen bonds between nitrogen atoms of benzimidazole rings, water and DMF molecules.
文摘A non-solvent synthesis procedure for the preparation of 2,2′-bipyrimidine, 4,4′,6,6′-tetramethyl-2,2′-bipyrimidine and 4,4′,6,6′-tetraphenyl-2,2′-bipyrimidine in high yields was developed using fresh copper powder as catalyst.
文摘A facile and highly efficient method has been developed for the synthesis of unsymmetrical N-aryl-2,2-di（1H-indol-3-yl）acetamide derivatives by regioselective Friedel-Crafts alkylation of the N-aryl-2-hydroxy-2-（1H-indol-3-yl） acetamide derivatives with various indoles catalyzed by 2 mol/L H2SO4 at room temperature in ashort reaction time, the yield was up to 94%.
基金Project supported by the Graduate Innovation Foundation of Jiangxi Province(No.YC2015-B023)the Science and Technology Research Project of Jiangxi Provincial Education Department(No.GJJ170170)~~
基金Supported by China Scholarship Council(Grant No.201206125047)China Postdoctoral Science Foundation Funded Project(Grant No.2012M520715)the Fundamental Research Funds for the Central Universities(Grant No.HIT.NSRIF.201462)
文摘This paper aims to study low dimensional cohomology of Hom-Lie algebras and the qdeformed W（2, 2） algebra. We show that the q-deformed W（2, 2） algebra is a Hom-Lie algebra. Also,we establish a one-to-one correspondence between the equivalence classes of one-dimensional central extensions of a Hom-Lie algebra and its second cohomology group, leading us to determine the second cohomology group of the q-deformed W（2, 2） algebra. In addition, we generalize some results of derivations of finitely generated Lie algebras with values in graded modules to Hom-Lie algebras.As application, we compute all αk-derivations and in particular the first cohomology group of the q-deformed W（2, 2） algebra.
基金supported by the National Natural Science Foundation of China (20972063 and 20621091)the 111 ProjectProgram for New Century Excellent Talents in University (NCET-06-0906)
文摘4-Hydroxycinnamic acid derivatives,including ferulic acid (FA) (1),sinapic acid (SA) (2) and caffeic acid (CA) (3),are widely distributed in the plant kingdom,and undergo oxidative cross-coupling leading to the corresponding dehydrodimers,trimers and even higher oligomers in plants. In order to evaluate the antioxidative ability of these 4-hydroxycinnamic acid derivatives and their oligomers,we synthesized 8-8'-bis-lactone-dimers (8-8'-DiFA (4),8-8'-DiSA (5) and 8-8'-DiCA (6)),as well as a new trimer (7),by the reaction of the corresponding monomers (1-3) with Ag2O in methanol,and assayed their free radical-scavenging activity by the reaction with 2,2-diphenyl-1-picrylhydrazyl radical (DPPH·). It was found that CA (3) and 8-8'-DiCA (6) bearing o-dihydroxyl groups exhibited significantly higher radical-scavenging activity than those bearing no such groups,and oxidative coupling of CA (3) resulted in remarkable enhancement in the activity.
