The reaction of aromatic aldehydes 1 with 5, 5-dimethyl-1, 3-cyclohexandione 2 was investigated in this paper by using [bmim][BF4] as the reaction medium. It was found that when the reaction was carried out in the pre...The reaction of aromatic aldehydes 1 with 5, 5-dimethyl-1, 3-cyclohexandione 2 was investigated in this paper by using [bmim][BF4] as the reaction medium. It was found that when the reaction was carried out in the presence of catalytic amount of FeCl3·6H2O, xanthenediones 3 was obtained in high yields. On the other hand, when a combination of trimethylchlorosilane (TMSCl) and FeCl3·6H2O was employed as the catalyst, the reaction afforded ring-opening derivatives of xanthenediones 4 with high efficiency.展开更多
目的:探讨山楂中有机酸对H_2O_2诱导H9C2心肌细胞损伤的保护作用及机制。方法:将对数期生长的H9C2心肌细胞随机分为6组:空白对照组、模型组、NAC阳性对照组和山楂有机酸(浓度分别为6.25、25、100μg/m L)组。心肌细胞在100μg/m L H_2O_...目的:探讨山楂中有机酸对H_2O_2诱导H9C2心肌细胞损伤的保护作用及机制。方法:将对数期生长的H9C2心肌细胞随机分为6组:空白对照组、模型组、NAC阳性对照组和山楂有机酸(浓度分别为6.25、25、100μg/m L)组。心肌细胞在100μg/m L H_2O_2作用2 h后,采用MTT法检测细胞增殖,利用试剂盒测定细胞外液LDH漏出量和GSH-Px活性及细胞内SOD、MDA水平。对心肌细胞进行HE染色,用光学显微镜观察细胞形态变化。结果:与模型组比较,山楂有机酸可促进H9C2心肌细胞增殖,使LDH漏出量和MDA含量显著降低,SOD和GSH-Px活性显著升高(P<0.05~P<0.001),并能明显抑制H_2O_2引起的心肌细胞形态改变。结论:山楂有机酸对H_2O_2诱导的H9C2心肌细胞损伤具有保护作用,作用机制可能和有效地改善细胞内抗氧化酶的活性,抑制氧化应激损伤有关。展开更多
Rice husk ash was used as a new, green, and cheap adsorbent for FeCl3. Characterization of the obtained reagent showed that rice husk ash supported FeCl2·2H2O was formed. This reagent is efficient at catalyzing t...Rice husk ash was used as a new, green, and cheap adsorbent for FeCl3. Characterization of the obtained reagent showed that rice husk ash supported FeCl2·2H2O was formed. This reagent is efficient at catalyzing the synthesis of multisubstituted quinolines by the Friedl鋘der heteroannulation of o‐aminoaryl ketones with ketones or β‐diketones under mild reaction conditions. This methodology allows for the synthesis of a broad range of substituted quinolines in high yields and with excellent regioselectivity in the absence of a solvent.展开更多
The novel copper?complex with salicylaldehyde benzoylhydrazone and pyridine ligands, Cu(C14H10N2O2)(C5H5N), has been synthesized and characterized by elemental analysis, IR and thermal analysis. The crystal structure ...The novel copper?complex with salicylaldehyde benzoylhydrazone and pyridine ligands, Cu(C14H10N2O2)(C5H5N), has been synthesized and characterized by elemental analysis, IR and thermal analysis. The crystal structure of the title complex has been determined by single crystal X ray diffraction techniques. The crystal belongs to monoclinic with space group P21/c. The cell parameters are: a=1.6362(9)nm, b=1.7140(9)nm, c=1.2255(7)nm, β=105.168(9)°, V=3.317(3)nm3, Z=8, Dc=1.525g·cm-3, μ(MoKα)=1.334mm-1, F(000)=1560. The structure wasrefined to final R1=0.0376, wR2=0.0909. The copper?ion lies in a distorted square planar environment composed of two oxygen atoms, one nitrogen atom of tridentate acyhydrazone Schiff base ligand and one nitrogen atom of the pyridine ligand. CCDC: 193111.展开更多
基金This work was financially supported by NNSFC(No.20273019)the Science Foundation of Henan Normal University for Young Scholars(No.0307032).
文摘The reaction of aromatic aldehydes 1 with 5, 5-dimethyl-1, 3-cyclohexandione 2 was investigated in this paper by using [bmim][BF4] as the reaction medium. It was found that when the reaction was carried out in the presence of catalytic amount of FeCl3·6H2O, xanthenediones 3 was obtained in high yields. On the other hand, when a combination of trimethylchlorosilane (TMSCl) and FeCl3·6H2O was employed as the catalyst, the reaction afforded ring-opening derivatives of xanthenediones 4 with high efficiency.
文摘目的:探讨山楂中有机酸对H_2O_2诱导H9C2心肌细胞损伤的保护作用及机制。方法:将对数期生长的H9C2心肌细胞随机分为6组:空白对照组、模型组、NAC阳性对照组和山楂有机酸(浓度分别为6.25、25、100μg/m L)组。心肌细胞在100μg/m L H_2O_2作用2 h后,采用MTT法检测细胞增殖,利用试剂盒测定细胞外液LDH漏出量和GSH-Px活性及细胞内SOD、MDA水平。对心肌细胞进行HE染色,用光学显微镜观察细胞形态变化。结果:与模型组比较,山楂有机酸可促进H9C2心肌细胞增殖,使LDH漏出量和MDA含量显著降低,SOD和GSH-Px活性显著升高(P<0.05~P<0.001),并能明显抑制H_2O_2引起的心肌细胞形态改变。结论:山楂有机酸对H_2O_2诱导的H9C2心肌细胞损伤具有保护作用,作用机制可能和有效地改善细胞内抗氧化酶的活性,抑制氧化应激损伤有关。
文摘Rice husk ash was used as a new, green, and cheap adsorbent for FeCl3. Characterization of the obtained reagent showed that rice husk ash supported FeCl2·2H2O was formed. This reagent is efficient at catalyzing the synthesis of multisubstituted quinolines by the Friedl鋘der heteroannulation of o‐aminoaryl ketones with ketones or β‐diketones under mild reaction conditions. This methodology allows for the synthesis of a broad range of substituted quinolines in high yields and with excellent regioselectivity in the absence of a solvent.
文摘The novel copper?complex with salicylaldehyde benzoylhydrazone and pyridine ligands, Cu(C14H10N2O2)(C5H5N), has been synthesized and characterized by elemental analysis, IR and thermal analysis. The crystal structure of the title complex has been determined by single crystal X ray diffraction techniques. The crystal belongs to monoclinic with space group P21/c. The cell parameters are: a=1.6362(9)nm, b=1.7140(9)nm, c=1.2255(7)nm, β=105.168(9)°, V=3.317(3)nm3, Z=8, Dc=1.525g·cm-3, μ(MoKα)=1.334mm-1, F(000)=1560. The structure wasrefined to final R1=0.0376, wR2=0.0909. The copper?ion lies in a distorted square planar environment composed of two oxygen atoms, one nitrogen atom of tridentate acyhydrazone Schiff base ligand and one nitrogen atom of the pyridine ligand. CCDC: 193111.
