Six new solid complexes of macrocyclic polyether ligand 4′-bromo-5′-nitrobenzo-15-crown-5(L)with Uivalent rare earth nitrates having composition of RE(NO_3)_3·L·mCH_3CN·nH_2O(RE=L_a--Nd,m=n=0, RE=Sm,B...Six new solid complexes of macrocyclic polyether ligand 4′-bromo-5′-nitrobenzo-15-crown-5(L)with Uivalent rare earth nitrates having composition of RE(NO_3)_3·L·mCH_3CN·nH_2O(RE=L_a--Nd,m=n=0, RE=Sm,Bu,m=0.1,n=1,4)have been synthesized in acetonitrile or acetone.All the isolated complexes have been char- acterized by elementary analysis,IR and UV spectra,differential thermal and thermogravimetric analysis,X-ray powder diffraction analysis,molar conductance and measurementa of solubility in some general solventa.It shows that coordination number of the rare earth cation in the complexes of La,Ce,Pr and Nd nitrate is eleven.展开更多
The novel title compound（Z）-N-（4-bromo-5-ethoxy-3,5-dimethylfuran-2（5H）-yli-dene）-4-methylbenzenesulfonamide 1（C15H18BrNO4S） has been unexpectedly synthesized by the aminohalogenation reaction of ethyl 2-methy...The novel title compound（Z）-N-（4-bromo-5-ethoxy-3,5-dimethylfuran-2（5H）-yli-dene）-4-methylbenzenesulfonamide 1（C15H18BrNO4S） has been unexpectedly synthesized by the aminohalogenation reaction of ethyl 2-methylpenta-2,3-dienoate with TsNBr2,and characterized by mp,IR,1H NMR,EIMS,ESIHRMS and single-crystal X-ray diffraction.It crystallizes in mono-clinic,space group P21/c with a = 11.714（5）,b = 14.106（5）,c = 10.402（4） ,β = 97.298（8）°,V = 1704.9（12） 3,Mr = 388.27,Z = 4,Dc = 1.513 g/cm3,μ（MoKα） = 2.549 mm-1,F（000） = 792,the final R = 0.033 and wR = 0.062 for 3098 observed reflections（Ⅰ 〉 2σ（Ⅰ））.展开更多
A series of ethyl 6-bromo-5-hydroxyindole-3-carboxylate derivatives were synthesized and their in vitro anti-influenza virus activity was evaluated. All the compounds were characterized by 1H NMR and MS.
The title compound 3-bromo-5-（4-chlorophenyl）-4-cyanopyrrole-N,N-dimethyl-2-amide（3） was synthesized with 4-bromo-2-（4-chlorophenyl）-5-（trifluoromethyl）-1H-pyrrole-3-carbonitrile（1） and N,N-dimethylformamide...The title compound 3-bromo-5-（4-chlorophenyl）-4-cyanopyrrole-N,N-dimethyl-2-amide（3） was synthesized with 4-bromo-2-（4-chlorophenyl）-5-（trifluoromethyl）-1H-pyrrole-3-carbonitrile（1） and N,N-dimethylformamide（2） by the α-C acylation reaction catalyzed by potassium t-butoxide, and characterized by IR, 1H-NMR and X-ray single-crystal diffraction. It crystallizes in monoclinic, space group P2（1/n）with a = 12.789（2）, b = 13.783（2）, c = 17.980（3） °, β = 109.230（3）°, V = 2992.5 A3, Mr = 352.62, Dc = 1.565 mg/m3, Z = 8, m = 2.924 mm-1, F（000） = 1408, the final R = 0.0424 and w R = 0.0973 for 3518 observed reflections with I 〉 2σ（I）. A total of 23559 reflections were collected, of which 6242 were independent（Rint = 0.0566）. The insecticidal, herbicidal and antibacterial activities of compound 3 were determined, and the experimental results showed that the mortality of 3 at the concentration of 100 ppm on the Fipronil against Linnaeus was 76.6%, the growth inhibition rate of 3 against Cynodon Dactylon under the condition of 100 ppm was 35.8% and the inhibitory activity of 3 at the concentration of 25 ppm against Fusarium graminearum reached 50.9%. Hence, the title compound has the value of further research and application prospect.展开更多
The title compound 4-bromo-5-ethoxy-3-methyl-5-（naphthalen-l-yl）-l-tosyl-lH- pyrrol-2（5H）-one 1 （C24H22BrNO4S, Mr = 500.40） has been synthesized and its crystal structure was determined by single-crystal X-ray d...The title compound 4-bromo-5-ethoxy-3-methyl-5-（naphthalen-l-yl）-l-tosyl-lH- pyrrol-2（5H）-one 1 （C24H22BrNO4S, Mr = 500.40） has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/n with a = 8.8562（15）, b = 18.118（3）, c = 14.055（2）A, β = 99.855（3）^o, V= 2221.9（6）A3, Z = 4, Dc = 1.496 g/cm^3,μ= 1.975 mm^-1, 2 = 0.71073A, F（000） = 1024, R = 0.0607 and wR = 0.1371.展开更多
Some new derivatives of 3-ethoxycarbonyl-6-bromo-5-hydroxyindoles were designed and prepared, their antiviral activity were determined in cell culture with virus cytopathic effect assay. The results showed compound ...Some new derivatives of 3-ethoxycarbonyl-6-bromo-5-hydroxyindoles were designed and prepared, their antiviral activity were determined in cell culture with virus cytopathic effect assay. The results showed compound Ⅶ b, Ⅶ h exhibited potential antiviral activity.展开更多
Objective 1-Bromo-3-chloro-5,5-dimethylhydantoin （BCDMH） is a solid oxidizing biocide for water disinfection.The objective of this study was to investigate the toxic effect of BCDMH on zebrafish.Methods The developm...Objective 1-Bromo-3-chloro-5,5-dimethylhydantoin （BCDMH） is a solid oxidizing biocide for water disinfection.The objective of this study was to investigate the toxic effect of BCDMH on zebrafish.Methods The developmental toxicity of BCDMH on zebrafish embryos and the dose-effect relationship was determined.The effect of BCDMH exposure on histopathology and tissue antioxidant activity of adult zebrafish were observed over time.Results Exposure to 4 mg/L BCDMH post-fertilization was sufficient to induce a number of developmental malformations,such as edema,axial malformations,and reductions in heart rate and hatching rate.The no observable effects concentration of BCDMH on zebrafish embryo was 0.5 mg/L.After 96 h exposure,the 50% lethal concentration （95% confidence interval （CI）） of BCDMH on zebrafish embryo was 8.10 mg/L （6.15-11.16 mg/L）.The 50% inhibitory concentration （95% CI） of BCDMH on hatching rate was 7.37 mg/L （6.33-8.35 mg/L）.Histopathology showed two types of responses induced by BCDMH,defensive and compensatory.The extreme responses were marked hyperplasia of the gill epithelium with lamellar fusion and epidermal peeling.The histopathologic changes in the gills after 10 days exposure were accompanied by significantly higher catalase activity and lipid peroxidation.Conclusion These results have important implications for studies on the toxicity and use of BCDMH and its analogs.展开更多
オhe fluorescent reagent, salicylaldehyde-5-bromo-salicyloylhydrazone (SABSH) was synthesized and its ionization constants were determined spectrophotometrically. The fluorescent reaction of this reagent with gallium ...オhe fluorescent reagent, salicylaldehyde-5-bromo-salicyloylhydrazone (SABSH) was synthesized and its ionization constants were determined spectrophotometrically. The fluorescent reaction of this reagent with gallium was studied. Based on this chelation reaction, a highly sensitive spectrofluorometric method was developed for the determination of gallium in a ethanol-water (3+2, V/V) medium at pH 2.3. Under these conditions, the GaⅢSABSH complex has excitation and emission maxima at 390 and 457 nm, respectively. The linear range of the method is from 0.0 to 1×10-4 g/L and the detection limit is 4×10-7 g/L of gallium when a standard additions method is used. The molar ratio of gallium to the reagent is 1∶1. Interferences were evaluated. The method was successfully applied to the determination of gallium in soil samples. Extraction with n-butyl acetate from 6 mol/L hydrochloric acid medium was used to separate gallium from the interfering elements in the soil samples.展开更多
Methyl 3-（5-bromo-l-ethyl-lH-indole-3-carbonyl）aminopropionate has been synthesized by the acylation of 5-bromo-3-trichloroacetylindole with β-alanine methyl ester, followed by alkylation with ethyl iodide, in 82.6...Methyl 3-（5-bromo-l-ethyl-lH-indole-3-carbonyl）aminopropionate has been synthesized 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/c with a = 11.7927（8）, b = 14.9342（8）, c = 9.0060（5） A, β = 101.558（6）°, V = 1553.93（16） A3, Z = 4, Dc= 1.510 g/cm3, 2 = 0.71073 A,μ（MoKa） = 2.656 mm-1, Mr = 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.展开更多
建立柱前衍生化-UPLC-MS/MS方法检测达格列净原料药中的潜在的基因毒性杂质5-溴-2-氯苯甲酰氯。以苯胺作为衍生化试剂,采用Acouity UPLC Bed C18柱(50 mm×2.1 mm, 1.7μm)为色谱柱,0.1%甲酸-水体系作为流动相进行梯度洗脱,体积流量...建立柱前衍生化-UPLC-MS/MS方法检测达格列净原料药中的潜在的基因毒性杂质5-溴-2-氯苯甲酰氯。以苯胺作为衍生化试剂,采用Acouity UPLC Bed C18柱(50 mm×2.1 mm, 1.7μm)为色谱柱,0.1%甲酸-水体系作为流动相进行梯度洗脱,体积流量0.3 mL/min,进样量2μL,柱温25℃;在电喷雾离子源、正离子监测下,采用多反应扫描(MRM)模式进行检测。该方法的专属性强;在1~100 ng/mL范围内线性关系良好(r=0.999 3);检测限和定量限分别为0.05 ng/mL和0.10 ng/mL;低、中、高浓度(n=3)的平均加样回收率在95.1%~106.5%之间,RSD均小于3.0%;衍生化产物在室温下12 h内稳定。该方法操作简便,灵敏度高,适用于检测达格列净原料药中5-溴-2-氯苯甲酰氯。展开更多
The reaction of aromatic carboxylic acid with oxalyl chloride gives rise to the corres- ponding acid chloride which without purification is treated with the sodium salt of mercapto- pyridine oxide in the presence of...The reaction of aromatic carboxylic acid with oxalyl chloride gives rise to the corres- ponding acid chloride which without purification is treated with the sodium salt of mercapto- pyridine oxide in the presence of 2,2-azo-bisisobutyronitrile (AIBN), radical initiator to give a brominated aromatic compound. After etherification and oxidation, 5-iodovaniline was converted to trisubstituted benzene carboxylic acid which give 1-bromo-3-methoxy-4-propoxy-5-iodo- benzene by this new brominating process with a yield of 74 %.展开更多
文摘Six new solid complexes of macrocyclic polyether ligand 4′-bromo-5′-nitrobenzo-15-crown-5(L)with Uivalent rare earth nitrates having composition of RE(NO_3)_3·L·mCH_3CN·nH_2O(RE=L_a--Nd,m=n=0, RE=Sm,Bu,m=0.1,n=1,4)have been synthesized in acetonitrile or acetone.All the isolated complexes have been char- acterized by elementary analysis,IR and UV spectra,differential thermal and thermogravimetric analysis,X-ray powder diffraction analysis,molar conductance and measurementa of solubility in some general solventa.It shows that coordination number of the rare earth cation in the complexes of La,Ce,Pr and Nd nitrate is eleven.
文摘The novel title compound（Z）-N-（4-bromo-5-ethoxy-3,5-dimethylfuran-2（5H）-yli-dene）-4-methylbenzenesulfonamide 1（C15H18BrNO4S） has been unexpectedly synthesized by the aminohalogenation reaction of ethyl 2-methylpenta-2,3-dienoate with TsNBr2,and characterized by mp,IR,1H NMR,EIMS,ESIHRMS and single-crystal X-ray diffraction.It crystallizes in mono-clinic,space group P21/c with a = 11.714（5）,b = 14.106（5）,c = 10.402（4） ,β = 97.298（8）°,V = 1704.9（12） 3,Mr = 388.27,Z = 4,Dc = 1.513 g/cm3,μ（MoKα） = 2.549 mm-1,F（000） = 792,the final R = 0.033 and wR = 0.062 for 3098 observed reflections（Ⅰ 〉 2σ（Ⅰ））.
文摘A series of ethyl 6-bromo-5-hydroxyindole-3-carboxylate derivatives were synthesized and their in vitro anti-influenza virus activity was evaluated. All the compounds were characterized by 1H NMR and MS.
基金supported by the National Natural Science Foundation of China(No.21272086)
文摘The title compound 3-bromo-5-（4-chlorophenyl）-4-cyanopyrrole-N,N-dimethyl-2-amide（3） was synthesized with 4-bromo-2-（4-chlorophenyl）-5-（trifluoromethyl）-1H-pyrrole-3-carbonitrile（1） and N,N-dimethylformamide（2） by the α-C acylation reaction catalyzed by potassium t-butoxide, and characterized by IR, 1H-NMR and X-ray single-crystal diffraction. It crystallizes in monoclinic, space group P2（1/n）with a = 12.789（2）, b = 13.783（2）, c = 17.980（3） °, β = 109.230（3）°, V = 2992.5 A3, Mr = 352.62, Dc = 1.565 mg/m3, Z = 8, m = 2.924 mm-1, F（000） = 1408, the final R = 0.0424 and w R = 0.0973 for 3518 observed reflections with I 〉 2σ（I）. A total of 23559 reflections were collected, of which 6242 were independent（Rint = 0.0566）. The insecticidal, herbicidal and antibacterial activities of compound 3 were determined, and the experimental results showed that the mortality of 3 at the concentration of 100 ppm on the Fipronil against Linnaeus was 76.6%, the growth inhibition rate of 3 against Cynodon Dactylon under the condition of 100 ppm was 35.8% and the inhibitory activity of 3 at the concentration of 25 ppm against Fusarium graminearum reached 50.9%. Hence, the title compound has the value of further research and application prospect.
基金This work was supported by the National Natural Science Foundation of China (No. 20472072 and 20332060)the CAS Academician Foundation of Zhejiang Province
文摘The title compound 4-bromo-5-ethoxy-3-methyl-5-（naphthalen-l-yl）-l-tosyl-lH- pyrrol-2（5H）-one 1 （C24H22BrNO4S, Mr = 500.40） has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/n with a = 8.8562（15）, b = 18.118（3）, c = 14.055（2）A, β = 99.855（3）^o, V= 2221.9（6）A3, Z = 4, Dc = 1.496 g/cm^3,μ= 1.975 mm^-1, 2 = 0.71073A, F（000） = 1024, R = 0.0607 and wR = 0.1371.
文摘Some new derivatives of 3-ethoxycarbonyl-6-bromo-5-hydroxyindoles were designed and prepared, their antiviral activity were determined in cell culture with virus cytopathic effect assay. The results showed compound Ⅶ b, Ⅶ h exhibited potential antiviral activity.
基金supported by the National Science and Technology Major Project "Creation of Major New Drugs", 2008ZX09305-001
文摘Objective 1-Bromo-3-chloro-5,5-dimethylhydantoin （BCDMH） is a solid oxidizing biocide for water disinfection.The objective of this study was to investigate the toxic effect of BCDMH on zebrafish.Methods The developmental toxicity of BCDMH on zebrafish embryos and the dose-effect relationship was determined.The effect of BCDMH exposure on histopathology and tissue antioxidant activity of adult zebrafish were observed over time.Results Exposure to 4 mg/L BCDMH post-fertilization was sufficient to induce a number of developmental malformations,such as edema,axial malformations,and reductions in heart rate and hatching rate.The no observable effects concentration of BCDMH on zebrafish embryo was 0.5 mg/L.After 96 h exposure,the 50% lethal concentration （95% confidence interval （CI）） of BCDMH on zebrafish embryo was 8.10 mg/L （6.15-11.16 mg/L）.The 50% inhibitory concentration （95% CI） of BCDMH on hatching rate was 7.37 mg/L （6.33-8.35 mg/L）.Histopathology showed two types of responses induced by BCDMH,defensive and compensatory.The extreme responses were marked hyperplasia of the gill epithelium with lamellar fusion and epidermal peeling.The histopathologic changes in the gills after 10 days exposure were accompanied by significantly higher catalase activity and lipid peroxidation.Conclusion These results have important implications for studies on the toxicity and use of BCDMH and its analogs.
文摘オhe fluorescent reagent, salicylaldehyde-5-bromo-salicyloylhydrazone (SABSH) was synthesized and its ionization constants were determined spectrophotometrically. The fluorescent reaction of this reagent with gallium was studied. Based on this chelation reaction, a highly sensitive spectrofluorometric method was developed for the determination of gallium in a ethanol-water (3+2, V/V) medium at pH 2.3. Under these conditions, the GaⅢSABSH complex has excitation and emission maxima at 390 and 457 nm, respectively. The linear range of the method is from 0.0 to 1×10-4 g/L and the detection limit is 4×10-7 g/L of gallium when a standard additions method is used. The molar ratio of gallium to the reagent is 1∶1. Interferences were evaluated. The method was successfully applied to the determination of gallium in soil samples. Extraction with n-butyl acetate from 6 mol/L hydrochloric acid medium was used to separate gallium from the interfering elements in the soil samples.
基金supported by the Natural Science Foundation of Guangdong Province (No.06300581)
文摘Methyl 3-（5-bromo-l-ethyl-lH-indole-3-carbonyl）aminopropionate has been synthesized 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/c with a = 11.7927（8）, b = 14.9342（8）, c = 9.0060（5） A, β = 101.558（6）°, V = 1553.93（16） A3, Z = 4, Dc= 1.510 g/cm3, 2 = 0.71073 A,μ（MoKa） = 2.656 mm-1, Mr = 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.
文摘The reaction of aromatic carboxylic acid with oxalyl chloride gives rise to the corres- ponding acid chloride which without purification is treated with the sodium salt of mercapto- pyridine oxide in the presence of 2,2-azo-bisisobutyronitrile (AIBN), radical initiator to give a brominated aromatic compound. After etherification and oxidation, 5-iodovaniline was converted to trisubstituted benzene carboxylic acid which give 1-bromo-3-methoxy-4-propoxy-5-iodo- benzene by this new brominating process with a yield of 74 %.
