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-bromonitrobenzene
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     (2).
     (2)、在模仿过程中存在性别差异吗?
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     2-i.
     在附加有NAA、2,4—D、IAA的培养基中,愈伤组织疏松、湿润、乳白色或白绿色、透明状或半透明状;
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     2-.
     先后。 2、压力超负荷下,不同时期心肌细胞凋亡与增生的程度存在动态差异;
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     A Facile Preparation of m-Bromonitrobenzene
     间溴硝基苯的制备
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Nitrobenzene reacts with potassium bromate in sulfuric acid to generate m-bromonitribenzene at room temperature, The method with simple instruments used, with operation conveniently handled, with the produpts easily isolated and in good yield, is better for synthesising m-bromonitrobenzene.

本文采用溴酸钾与硝基苯反应制备m-溴硝基苯。在常温下,反应时间短,重复性好,易分离,产率高。它是合成m-溴硝基苯较好方法。

The mutagenicity of O-dinitrobenzene, M-dinitrobenzene, 2,6-dinitrotoluene, 2,4-dinitrotoluene, 4-chloronitrobenzene, 4-bromonitrobenzene were analysis by micronucleus test in vicia faba root tip cells and human peripheral blood lymphocytes. M-dinitrobenzene, 2,4-dinitrotoluene, 2,6-dinitrotoluene and O-dinitrobenzene all induced micronucleus formation in vicia faba root tip cells, and the dose-effect relationships were significant. In human peripheral blood lymphocytes all six nitro-aromatic compounds...

The mutagenicity of O-dinitrobenzene, M-dinitrobenzene, 2,6-dinitrotoluene, 2,4-dinitrotoluene, 4-chloronitrobenzene, 4-bromonitrobenzene were analysis by micronucleus test in vicia faba root tip cells and human peripheral blood lymphocytes. M-dinitrobenzene, 2,4-dinitrotoluene, 2,6-dinitrotoluene and O-dinitrobenzene all induced micronucleus formation in vicia faba root tip cells, and the dose-effect relationships were significant. In human peripheral blood lymphocytes all six nitro-aromatic compounds were positive, and dose-effect relationships were significant except 4-bromonitrobenzene. Compared with the defining dose, the mutagenicity of five nitro-aromatic compounds decreased in order of 2,4-dinitrotoluene, 4-chloronitrobenzene, M-dinitrobenzene, 2,6-dinitrotoluene, O-dinitrobenzene; the detected level of micronucleus test in vicia faba root tip cells was higher than that of micronucleus test in human peripheral blood lymphocytes.

利用蚕豆根尖细胞和人外周血淋巴细胞的微核试验对6种硝基芳烃化合物的致突变性进行比较研究,结果表明,邻二硝基苯、间二硝基苯、2,4-二硝基甲苯、2,6-二硝基甲苯、对硝基氯苯和对硝基溴苯均能诱发两种细胞的微核率增加,除了对硝基溴苯外均具有明显的剂量—效应关系。引进标准剂量概念比较5种硝基芳烃化合物的致突变性,结果表明,致突变性强弱依次为2,4-二硝基甲苯>对硝基氯苯>间二硝基苯>2,6-二硝基甲苯>邻二硝基苯。另外,蚕豆根尖细胞微核方法的检测水平高于人外周血淋巴细胞微核方法。

Aim To study the synthetic technique of 1, 2, 6,7-tetramethoxyl-9H-carbazole (1) and 2,3,6,7-tetramethoxyl-9H-carbazole (2). Methods 2-(3, 4-Dimethoxyl)-4, 5-dimethoxylnitrobenzene (3) was prepared by the Ullmann reaction from 4, 5-dimethoxyl-2-bromonitrobenzene (1) and 4-iodo-1, 2-dimethoxyl-benzene (2).The obtained product was reductively cyclized with (EtO)3P to give 1, 2, 6, 7-tetramethoxyl-9H-carbazole (1) and 2, 3, 6, 7-tetramethoxyl-9H-carbazole (2) . Results The yield of 2-(3, 4-dimethoxyl)-4,...

Aim To study the synthetic technique of 1, 2, 6,7-tetramethoxyl-9H-carbazole (1) and 2,3,6,7-tetramethoxyl-9H-carbazole (2). Methods 2-(3, 4-Dimethoxyl)-4, 5-dimethoxylnitrobenzene (3) was prepared by the Ullmann reaction from 4, 5-dimethoxyl-2-bromonitrobenzene (1) and 4-iodo-1, 2-dimethoxyl-benzene (2).The obtained product was reductively cyclized with (EtO)3P to give 1, 2, 6, 7-tetramethoxyl-9H-carbazole (1) and 2, 3, 6, 7-tetramethoxyl-9H-carbazole (2) . Results The yield of 2-(3, 4-dimethoxyl)-4, 5-dimethoxylnitrobenzene was 42% with the material of 4, 5-dimethoxyl-2-bromonitrobenzene and 4-iodo-1, 2-dimethoxylbenzene. 1 and 2 were produced through cyclization of 3 in the yields of 38% and 39% respectively. Conclusions The compounds of 1 and 2 were obtained in equal yields by the cyclization of 3 with(EtO)3P. The experiments demonstrate that 2 can also be synthesized through the cyclization of 4,4 , 5,5 -tetramethoxyl-2, 2'-dinitrobiphenyl, the by-product of the Ullmann reaction with (EtO)3P.

目的研究1,2,6,7-四甲氧基-9H-咔唑和2,3,6,7-四甲氧基-9H-咔唑的合成方法。方法以4,5-二甲氧基-2-溴硝基苯和4-碘-1,2-二甲氧基苯为原料,经Ullmann反应得2-(3,4-二甲氧基苯基)-4,5-二甲氧基硝基苯(3),再经亚磷酸三乙酯还原环合得1,2,6,7-四甲氧基-9H-咔唑(1)和2,3,6,7-四甲氧基-9H-咔唑(2)。结果以4,5-二甲氧基-2-溴硝基苯和4-碘-1,2-二甲氧基苯为原料,制得3的收率为42%,3经环合制备1和2的收率分别为38%和39%。结论化合物3经亚磷酸三乙酯还原环合时,等量得到1和2。研究发现化合物2还可由Ullmann反应的副产物4,4’,5,5’-四甲氧基,2,2’-二硝基联苯4经亚磷酸三乙酯还原环合制得。

 
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