1)4-Hydroxycoumarin4-羟基香豆素
英文短句/例句
1.Direct Sulfanylation of 4-Hydroxycoumarins with Thiols in Water for Synthesis of 4-sulfanylcoumarins水相中4-羟基香豆素直接硫醚化合成4-硫醚基香豆素衍生物
2.Synthesis of 3,3-Arylidene Bis(4-hydroxycoumarin) Catalyzed by Sulfamic Acid in Aqueous Media under Microwave Irradiation微波辐射下氨磺酸催化水相合成3,3-亚芳基双(4-羟基香豆素)
3.Study on Microwave-Induced Synthesis、Spectra and Electrochemical of 4-Hydroxycoumarin and Its Derivatives;4-羟基香豆素及其衍生物的微波合成、光谱及电化学性质研究
4.Microwave-induced Synthesis and Spectral Properties of New 4-Hydroxycoumarin Derivatives新型4-羟基香豆素衍生物的微波合成及其光谱性质
5.The Synthesis of 7-Hydroxy-4-Methyl Coumarin by Using Microwave Catalysis;微波催化合成7-羟基-4-甲基香豆素
6.Synthesis of 7-Hydroxy-4-methylcoumarin Using Phenyl Sulfonic Acid as Catalyst苯磺酸催化合成7-羟基-4-甲基香豆素
7.Synthesis of 7-hydroxy-4-methyl Coumarin Catalyzed by Amberlyst 15 without SolventAmberlyst15催化7-羟基-4-甲基香豆素的无溶剂合成
8.Synthesis of 4-ethoxy-7-hydroxycoumarin and its derivatives4-乙氧基-7-羟基香豆素及其衍生物的合成
9.Synthesis of 8(or 6)-Chloro-7-hydroxy-4-methylcoumarins and Their Derivatives8(或6)-氯-7-羟基-4-甲基香豆素及其衍生物的合成
10.Synthesis of 6, 7-dihydroxycoumarin;6，7-二羟基香豆素的合成与研究
11.Improvement of the Catalyst in Reaction on the Synthesis of 7-Diethylamino-4-methylcoumarin7-二乙氨基-4-甲基香豆素合成中催化剂的改良
12.Determination of the Output of Hydroxyl Free Radical by Fluorescence Quenching Method with Hymecromone-Mn~(2+)-H_2O_2 System and Hydroxyl Free Radical-scavenging Activity of Aqueous Extracts of Common Foodstuffs羟甲香豆素荧光猝灭法测定羟自由基产生量及常见食品水提物羟自由基清除率测定的研究
13.Food additive--Tertiary butyl-4-hydroxyl anisoleGB1916-1980食品添加剂叔丁基-4-羟基茴香醚
14.Theoretical studies of the electronic structures and spectral properties of 3-and 4-phenylcoumarins3-和4-苯基香豆素化合物的电子结构及光谱性质的理论研究
15.Dissolution determination for hymecromone preparation羟甲香豆素制剂溶出度测定方法的研究
16.Study on the Cloning and Expression of a p-Coumarate 3-hydroxylase Gene in Phyllostachys edulis毛竹香豆酸-3-羟基化酶基因的克隆与表达研究
17.They added a small amount of the fluorescent dye coumarin to the emitter material tris (8-hydroxy-quinoline) aluminum.他们在发光材料三（8?羟基口喹啉）化铝里，加入了少量的萤光染料香豆素。
18.7- chloro -4-hyddroxyquinoline-3-carboxylic aicd7-氯-4-羟基喹啉-3-羟酸
相关短句/例句
7-hydroxy-4-methyl coumarin7-羟基-4-甲基香豆素
1.Synthesis of 7-hydroxy-4-methyl coumarin catalyzed by sulfoacid resin;磺酸树脂催化合成7-羟基-4-甲基香豆素
2.Synthesis of 7-hydroxy-4-methyl coumarin on stannic chloride anhydrous catalyst;四氯化锡催化合成7-羟基-4-甲基香豆素
3.7-hydroxy-4-methyl coumarin as chemical or medical intermediates is very important in industry.7-羟基-4-甲基香豆素是一种重要的医药化工中间体。
3)4-methyl-7-hydroxycoumarin4-甲基-7-羟基香豆素
1.4-methyl-7-hydroxycoumarin,acetic anhydride were used as main materials to synthesis 4-methyl-7-acetoxycoumarin by two methods,One was direct esterification of 4-methyl-7-hydroxycoumarin with acetic anhydride,the other was reacting of acetic anhydride with 4-methyl-7-hydroxy coumarin′ sodium salt, the construction of title compound was confirmed by m.以乙酸酐、4-甲基-7-羟基香豆素为原料,采用4-甲基-7-羟基香豆素与乙酸酐直接酯化和乙酸酐与4-甲基-7-羟基香豆素的钠盐反应两种方法得到4-甲基-7-乙酰氧基香豆素,并通过熔点、红外、紫外、元素分析对所得化合物的结构进行表征。
4)7-Hydroxy-4-methylcoumarin7-羟基-4-甲基香豆素
5)6,7-Dihydroxy-4-methylcoumarin6，7-二羟基-4-甲基香豆素
6)3-Benzyl-4-hydroxycoumarin3-苄基-4-羟基香豆素
延伸阅读
4-羟基香豆素分子式：C9H6O3分子量：162.14CAS号：1076-38-6性质：微黄色针状结晶。熔点206℃。易溶于乙醇、乙醚和热水。与三氯化铁作用呈棕色。制备方法：由乙酰水杨酸甲酯环合而得。将碳酸钠和液体石蜡投入反应锅中，密闭加热搅拌，温度逐渐升至240℃，加入溶化的乙酰水杨酸甲酯，当温度下降约10min后，又逐渐上升，保持在240-260℃。加毕，回流1h。出料，过滤，滤液弃去固体溶于水中，加热至70℃左右，分离上层少量油层后，加盐酸调pH为6，加活性炭脱色。过滤，滤液再用盐酸酸化至pH为1，即有4-羟基香豆素析出，加冰使析出完全，过滤，水洗至洗液呈中性，滤饼干燥后即得4-羟基香豆素成品。收率15.21%。在生产中，可以乙酰水杨酰氯为原料，与乙酰乙酸乙酯缩合成a-（2-羟基苯甲酰基）乙酰乙酸乙酯，加氢氧化钠溶液水解得到a-（2-羟基苯甲酰基）乙酰乙酸钠。然后在92%硫酸中，于110-115℃环合，生成3-乙酰基-4-羟基香豆素，进而水解得到4-羟基香豆素。该法的收率约64%。用途：该品是医药，农药的中间体。用于生产双香豆素、新抗凝，华法林等抗凝血药物。这类4-羟基香豆素衍生物是一类口服抗凝血药物。双香豆素因吸收不规则、不完全，已被华法林等所取代。双香豆素作用维持时间最长（4-7d），华法林较长（3-5d），新抗凝较短（2-4d），香豆素乙酯最短（2-3d）。4-羟基香豆素也是一些杀鼠药的中间体，例如杀鼠灵、氯杀鼠灵、克杀鼠、杀鼠萘、联苯杀鼠萘等。杀鼠灵是第一代抗凝血型杀鼠剂，在全世界广泛使用，杀鼠效果很好。第二代抗凝血型杀鼠剂是溴联苯杀鼠萘，只要一次投饵即可使鼠中毒致死，在美国杀鼠剂市场中已占30%。4-羟基香豆素也是一种香料，香豆素类在植物界分布广泛。牛马吃了腐败的紫苜蓿曾因丧失血凝性而出血致死,这可能是由于植物中香豆精形成双香豆素而造成。
