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溴化作用

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Seven central depressants,including chloral hydrate,potassium bromide,sodium bromide,cal- cium bromide,alcohol,amytal and chloretone, were studied for their effects on the intraperito- neal toxicity of tartar emetic and sodium stibo- gluconate in mice.

1。关于吐酒石与葡萄糖酸锑 V 钠对小白鼠的致死作用,我们探索了一些中枢抑制药与兴奋药的影响。所试的抑制药有水合氯醛,溴化钾,溴化钠,溴化钙,酒精,安眠妥与三氯叔丁醇七种。兴奋药有苯甲酸钠咖啡硷与士的宁二种,以及溴咖合剂。2。

The studies of the effect of ZnBr_2 on the bromination of C_(60)and fulleropyrrolidines were also carried out,and the products were characterized by UV-vis and IR spectroscopy.

并研究了溴化锌在C_(60)、C_(60)吡咯烷衍生物溴化过程中的作用,产物经紫外可见吸收光谱、红外吸收光谱表征。

During baking, bromates are completely reduced to bromide s with no bromination of flour constituents.

在焙烤过程中,不用通过面粉各组分的溴化作用,溴酸盐也会全部彻底地还原成溴化物。

During baking, bromates are completely reduced to bromides with no bromination of flour constituents.

在焙烤过程中,不用通过面粉各组分的溴化作用,溴酸盐也会全部彻底地还原成溴化物。

The monomer ofbromostyrene was synthesized fromβ-bromobenzene by eliminating hydrogenbromide under sodium hydrate.

溴乙基溴代苯在氢氧化钠的作用下,发生溴化氢脱除反应,得到溴代苯乙烯单体。

Through analyzing the driving energy of intercalation and the force of sequence special recognition, it can be concluded that both the intercalation and special recognition are mainly through electrostatical interaction.

对溴化乙锭插入DNA分子的驱动力和序列特异性识别的作用力分析,揭示溴化乙锭插入DNA分子的驱动力和碱基对的特异性识别均以静电作用为主。

Tetrachloroterephthalic acid was prepared by chlorinating terephthalic acid, oleumsolvent and iodine catalyst. Tetrachloroterephthalic acid was acylated by sulphurous oxychloride in the presence of DMF to form tetrachloroterephthaloyl chloride. The acyl chloride product was fluorinated by potassium fluoride and esterified by methanol to synthesize dimethyl tetrafluoroterephthalate. The ester was reduced with potassium borohydride and lithium chloride to give tetrafluoroterephthalyl alcohol. The above product was bromated in the hydrobromic acid to obtain 4-bromomethyl-2,3,5,6-tetrafluoro-benzene methanol. 4-Methyl-2,3,5,-6-tetrafluorobenzene ethanol was obtained by reducing the bromide with magnesium. In the exist of DCC and DMAP, tefluthrin was got by the condensation reaction between 4-methyl-2,3,5,6-tetrafluoro-benzene methanol and-(1RS,3RS)- 3-(2- chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropanecar-boxylate acid.

对苯二甲酸与氯气在碘存在下以发烟硫酸为溶剂进行氯化制备四氯对苯二甲酸;再以DMF为催化剂与二氯亚砜反应生成四氯对苯二甲酰氯;以氟化钾为氟化剂,环丁砜为溶剂置换氟化,再与甲醇酯化得到四氟对苯二甲酸甲酯;以KBH4-LiCl为还原剂二甲醚为溶剂反应制得四氟对苯二甲基苄醇;以氯苯为溶剂在溴化氢溶液中溴化得到溴化产物;在乙醇溶液中经镁粉还原得到4-甲基-2,3,5,6-四氟苄醇;甲基苄醇与功夫酸在催化剂二环己基碳二亚胺和4-二甲氨基吡啶作用下缩合得到七氟菊酯,总收率达43.6%。

In solid phase process, the polyiodides, which include triiodide, pentaiodide, heptaiodide, nonaiodide and undecaiodide tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide and tetramethyl ammonium iodide poly-compounds, were synthesized by the low-heat solid phase reaction between iodine and tetra-n-butyl ammonium iodide, tetrabutyl ammonium bromide or tetramethyl ammonium iodide; In complexation process, solution polyiodides were synthesized by complexing action of different agents; In resinifying process, triiodide, pentaiodide, heptaiodide resinic polyiodides were synthesized by ion-exchange when the strong basicity styrene anion exchange resin, potassium iodide and iodine were used as raw materials.

固相法是用正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵分别与碘作用,通过低热固相反应,合成出碘三、碘五、碘七、碘九和碘十一形式的正四丁基碘化铵、四丁基溴化铵或四甲基碘化铵的系列高聚碘化合物;在络合法合成溶液高聚碘的实验中,选用几种络合剂通过络合作用首次合成了溶液高聚碘;树脂法合成高聚碘的实验是采用强碱性苯乙烯系阴离子交换树脂、碘化钾和碘为原料,通过离子交换,合成了碘三、碘五和碘七形式的树脂高聚碘。

Electrochemical behaviour of ethidium bromide on a wax impregnated spectrographic electrode was studied.

研究了溴化乙锭在浸蜡光谱石墨电极上的电化学行为,用电化学循环伏安法及紫外-可见光谱法对溴化乙锭与 DNA的作用进行了研究,得出溴化乙锭与 DNA发生嵌插作用的结

N-methylmaleimide was prepared by using dimethyl sulfate as methylation reagent.The paper investigated the addition of N-methyl-3,4-dibromomaleimide and indolylmagnesium bromide,and then 2-bromo-3-(1H-indolyl-3-yl)-N-methylmaleimide and 3,4-bis(1H-indolyl-3-yl-)-N-methyl-maleimide were obtained.

对吲哚在溴乙烷和镁作用下生成吲哚溴化镁,而后与3,4-二溴-N-甲基马来酰亚胺的加成反应进行了研究,合成了2-溴-3-(1H-吲哚-3)-N-甲基马来酰亚胺,并对反应条件进行了改进,研究了反应温度和原料配比对反应的影响。

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