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电合成4-氨基-4′-氯二苯甲酮的研究 总被引:1,自引:0,他引:1
以正交法研究了以4-硝基-4′-氯二苯甲酮为原料电合成4-氨基-4′-氯二苯甲酮过程.实验结果表明,以ρ( 4-硝基-4′-氯二苯甲酮)=18.0 g/L溶液为原料,与ρ(硫酸钛)=18.0 g/L溶液、c(H2SO4)=1.1 mol/L硫酸溶液组成电解液,于无隔膜电解池中,在75~80 ℃、电流密度5 A/dm2的条件下,电合成4-氨基-4′-氯二苯甲酮的收率为82.7%.产物经过高效液相色谱归一法测定,质量分数为99.1%. 相似文献
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以正交法研究了以4 硝基 4′ 氯二苯甲酮为原料电合成4 氨基 4′ 氯二苯甲酮过程。实验结果表明,以ρ(4 硝基 4′ 氯二苯甲酮)=18 0g/L溶液为原料,与ρ(硫酸钛)=18 0g/L溶液、c(H2SO4)=1 1mol/L硫酸溶液组成电解液,于无隔膜电解池中,在75~80℃、电流密度5A/dm2的条件下,电合成4 氨基 4′ 氯二苯甲酮的收率为82 7%。产物经过高效液相色谱归一法测定,质量分数为99 1%。 相似文献
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李付刚 《精细与专用化学品》2006,14(14):15-16
4-氯-2-硝基苯甲酸用甲基磺酰胺与五氯化磷氰化,铂炭催化剂存在下加氢还原得2-氨基-4-氯苯甲腈,接着与叠氮化钠成四唑环合成5-(2-氨基-4-氯苯基)四氮唑;以4-氯-2-硝基苯甲酸计,产品总收率70%,含量99%(HPLC法),产品经IR,1HNMR,MS测定,表明结构正确。 相似文献
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黄向红 《高校化学工程学报》2002,(2)
对硝基苯甲酰氯和氯苯在无水三氯化铝催化下,生成4-硝基-4-氯二苯甲酮。通过多因素正交试验,确定最佳工艺条件为对硝基苯甲酰氯:氯苯:无水三氯化铝 = 1.0:2.0:1.3(mol),保温温度70℃,保温时间1.5h。收率为84.33%,含量99.36%。产品结构经红外光谱、核磁共振、质谱和元素分析测定证实。实验操作简单,分离容易。 相似文献
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以Na2S2为还原剂,将4-硝基-4’-氯二苯甲酮还原成4-氨基-4’-氯二苯甲酮,通过对反应物配比、反应时间、反应温度进行多因素正交试验,确定了最佳工艺条件,反应温度92℃,反应时间2.5小时,4-硝基-4’-氯二苯甲酮:Na2S2=1:1.7(mol),收率为85.80%,含量为98.08%。产品结构经红外光谱、核磁共振、质谱和元素分析证实。实验操作简单,分离容易。 相似文献
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4-硝基-4′-氯二苯甲酮的合成研究 总被引:1,自引:0,他引:1
黄向红 《高校化学工程学报》2002,16(2)
对硝基苯甲酰氯和氯苯在无水三氯化铝催化下,生成4-硝基-4′-氯二苯甲酮.通过多因素正交试验,确定最佳工艺条件为对硝基苯甲酰氯:氯苯:无水三氯化铝 = 1.0:2.0:1.3(mol),保温温度70℃,保温时间1.5h.收率为84.33%,含量99.36%.产品结构经红外光谱、核磁共振、质谱和元素分析测定证实.实验操作简单,分离容易. 相似文献
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Zhang Shengbang Zhang Xuejun 《化工中间体》2006,(5)
研究了4-硝基-4ˊ氯二苯甲酮.以对硝基苯甲酰氯为原料,与氯苯在无水三氯化铝的催化下,经C-酰化反应得到4-硝基-4ˊ-氯二苯甲酮,经过正交试验,得到优化条件为对硝基苯酰氯:氯苯:三氯化铝=1:2.7:1.7(mol),反应时间1.5h,反应温度为70℃,在优化条件下实验的产率为88.9%,纯度99.2%。熔点101-103℃。 相似文献
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以2-对硝基苄氧羰基甲氧亚胺基-3-氧代丁酸、磺酰氯为起始原料,在一定条件下经过反应、处理,得到(顺式或反式)即(Z或E)-4-氯-2-对硝基苄氧羰基甲氧亚胺-3-氧代丁酸。通过红外、核磁共振对其结构进行了表征。较佳工艺条件:原料摩尔比n(2-对硝基苄氧羰基甲氧亚胺基-3-氧代丁酸)∶n(磺酰氯)=1∶1.4,在50~55℃反应5~6 h,反应完调节体系pH值为6.5±0.1,顺式、反式异构体产品分离效果达到99%以上,收率分别是24%和48%,纯度均为98%。 相似文献
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以乙酰甘氨酸和苯甲醛及其衍生物为原料,合成了一系列含碳碳双键的前手性底物,(Z)-2-乙酰氨基苯丙烯酸,(Z)-2-乙酰氨基-3-(对甲氧苯基)-丙烯酸,(Z)-2-乙酰氨基-3-(对氯苯基)-丙烯酸,(Z)-2-乙酰氨基-3-(间氯苯基)-丙烯酸,(Z)-2-乙酰氨基-3-(间硝基苯基)-丙烯酸。后4种是新的有机化合物,产物结构经过核磁共振,质谱分析确证。 相似文献
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(4-Chlorobutyl)thiirane is prepared in 80% yield in a single step from (4-chlorobutyl)oxirane. Homopolymerization of (4-chlorobutyl)thiirane with ZnEt2—CH3OH or CdCO3 initiator systems provides poly[(4-chlorobutyl)thiirane] as a soft elastomer with inherent viscosity 0.2dL/g. Reaction of poly[(4-chlorobutyl)thiirane] with tetra-n-butylammonium benzoate in N,N-dimethylacetamide proceeds by direct displacement, without involvement of the backbone sulfur atom. Solvolysis under more strongly ionizing conditions (acetic acid/chloroform) occurs with repeating unit isomerization, most probably via a cyclic intermediate formed by attack of the backbone sulfur atom on the chloromethyl group at the side chain terminus. 相似文献
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(4-Chlorobutyl)thiirane is prepared in 80% yield in a single step from (4-chlorobutyl)oxirane. Homopolymerization of (4-chlorobutyl)thiirane with ZnEt2—CH3OH or CdCO3 initiator systems provides poly[(4-chlorobutyl)thiirane] as a soft elastomer with inherent viscosity 0.2dL/g. Reaction of poly[(4-chlorobutyl)thiirane] with tetra-n-butylammonium benzoate in N,N-dimethylacetamide proceeds by direct displacement, without involvement of the backbone sulfur atom. Solvolysis under more strongly ionizing conditions (acetic acid/chloroform) occurs with repeating unit isomerization, most probably via a cyclic intermediate formed by attack of the backbone sulfur atom on the chloromethyl group at the side chain terminus. 相似文献
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(4<Emphasis Type="Italic">Z</Emphasis>,15<Emphasis Type="Italic">Z</Emphasis>)-Octadecadienoic Acid Inhibits Glycogen Synthase Kinase-3β and Glucose Production in H4IIE Cells
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Jun Yoshida Shota Uesugi Tetsuaki Kawamura Ken-ichi Kimura Dawei Hu Shuang Xia Naoki Toyooka Masao Ohnishi Hideki Kawashima 《Lipids》2017,52(3):295-301
Many uncommon non-methylene-interrupted fatty acids (NMI FA) are present in limpet gonads, but their biological properties remain unknown. To investigate new biological effects of naturally occurring NMI FA in eukaryotic cells, the biological activities of structurally analogous (4Z,15Z)-octadecadienoic acid (1), (9Z,20Z)-tricosadienoic acid (2), and (12Z,23Z)-hexacosadienoic acid (3) were examined by using a yeast-based drug-screening system using the Ca2+-sensitive mutant strain, Saccharomyces cerevisiae (zds1Δ erg3Δ pdr1Δ pdr3Δ). Among 1–3, 1 showed restored growth activity at a dose of 80 µg/disc in the mutant yeast strain. This phenotype suggests that 1 suppresses Ca2+-signaling of the mutant yeast through inhibition of glycogen synthase kinase-3β (GSK-3β) or calcineurin pathways or both. From this result, the inhibitory activity of 1–3 against GSK-3β was further determined. 1–3 showed potent inhibitory activity against GSK-3β with IC50 values ranging from 8.7 to 21.9 µM. Inhibition of GSK-3β reduces gene expression of the gluconeogenic key enzymes in liver, so we analyzed glucose production in rat hepatoma H4IIE cells to assess GSK-3β inhibitory activity of 1–3. Acid 1 inhibited glucose production at 25 µM in H4IIE cells. Our results would open up new possibilities for an anti-diabetic effect of 1 and might provide important insights into understanding the biological properties of naturally occurring NMI FA. 相似文献
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电沉积(Ni-W-P)-Si3N4复合镀层及性能研究 总被引:1,自引:0,他引:1
采用电沉积方法,在Ni-W-P合金中复合S i3N4微粒,获得(Ni-W-P)-S i3N4复合镀层。研究了镀液中Si3N4质量浓度、电流密度以及搅拌速度等工艺条件对复合镀层中Si3N4质量分数的影响。X-射线衍射、扫描电子显微镜测试结果表明:Si3N4微粒在镀层中均匀分布,与Ni-W-P合金各自在特定的角度出现衍射特征峰,彼此之间互不干扰。随着镀层中Si3N4质量分数的增加,镀层的性能均按照一定的规律发生变化。当Si3N4的质量分数为最大值10.3%时,镀层性能在各组实验比较中均最优,耐磨性能最好。 相似文献
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