Study on the synthesis and antimicrobial activities of brominated dihydroxy diphenyl ethers 溴代二羟基二苯醚类化合物的合成与抑菌活性研究
3.
Color reaction of 2 - 4 - chloro - 2 - phosphophenylazo - 7 - 2 , 4 - dichlorophenylazo - 1 , 8 - dihydroxy - 3 , 6 - naphthalene sulfonic acid with bismuth and its application 萘二磺酸与铋的显色反应研究及应用
4.
Effects of tertiary butylhydroquinone and 1 , 1 - di 2 ' , 5 ' - dihydroxy - 4 ' - butyl - phenyl ethane in curing and prevention of experimental atherosclerosis 乙烷和叔丁基对苯二酚对鹌鹑实验性动脉粥样硬化的影响
5.
Spectrophotometric study on supermolecule color reaction between serum proteins and 2 - 4 - sulfophenylazo - 1 , 8 - dihydroxy 3 , 6 - naphthalenedisulphonic acid and its applications 萘二磺酸与蛋白质超分子显色反应的研究及应用
6.
Hydroxyquinol triacetate was prepared from p - benzoquinone by 1 , 4 - addition reaction with acetic anhydride and then 6 , 7 - dihydroxy coumarin was synthesized from it by hydrolyze and cyclization in concentrated sulfuric acid . then 6 , 7 - dimethoxy coumarin was synthesized by methylating from 6 , 7 - dihydroxy coumarin with an overall yield of 74 . 4 % . the procedure was practical . its structure was confirmed by ir and 1hnmr 对苯醌与乙酸酐经1 , 4 -加成生成1 , 2 , 4 -苯三酚三乙酸酯,然后与苹果酸反应经水解、环合反应得6 , 7 -二羟基香豆素,再经甲基化得到6 , 7 -二甲氧基香豆素,总收率为74 . 4 % ,整个过程反应条件温和,操作方便,适合工业生产的要求,对产品结构进行了ir和1hnmr表征。
7.
Through molecular design , a series of liquid crystalline copolyesters , which possibly possessed the auxetic behavior , were prepared by solution condensation reaction between 2 , 5 - bis ( p - alkoxy benzoyloxy ) hydrobenzoquinone , 4 , 4 ' - ( decanoxy ) dibenzoyl chloride and 4 , 4 ' - dihydroxy - oc , co - diphenoxydecane 经分子设计，通过2 ， 5 ?二(对烷氧基苯酰氧基)对苯二酚、 4 ， 4 ’ ?二羟基? ， ?二苯氧基癸烷和4 ， 4 ’ ? (癸二酰氧基)二苯甲酰氯之间的缩合反应合成了一系列具有负泊松比潜能的液晶共聚酯。
8.
Two kinds of flavonoids in water extracts , water - extraction and alcohol precipitation , alcohol extracts were found by paper chromatography . they were separated and purified by thin - layer chromatography , one of which was primarily identified by uv as 4 " , 5 - dihydroxy - flavonol etherification or 4 " , 5 , 8 - trihydroxy - flavonol etherification 水提物、水提醇沉物、醇提物等3种提取物纸层析结果显示有两种黄酮类化合物，经薄层层析分离纯化，并进行紫外光谱分析，初步测定其中一组分为4 ， 5 -二羟基黄酮醇醚或4 ， 5 ， 8 -三羟基黄酮醇醚。
