查询词典 hydroxy acid

Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.

采用"一勺烩"方法，以4-羟基苯甲腈为起始原料，首先与硫氢化钠和无水氯化镁在N，N-二甲基甲酰胺中反应，所得中间体不经分离，直接加入2-氯乙酰乙酸乙酯进行环合反应，得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（2）；然后通过六亚甲基四胺/三氟乙酸进行Duff反应，得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（3）；再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。

The reaction of calcium L-threonate with hydrogen bromide in acetic acid readily yields (2S, 3S)-2, 4 -dibromo-3 -hydroxy butanoic acid which was further converted into methyl (2s, 3S)-2,4-dibromo-3-hydroxybutanoate by treatment of methanol.

在化合物12上引入氨基甲酰基可用二氯磷异氰酸酯、氯乙酰异氰酸酯或氯磺酰异氰酸酯，随之引入的二氯磷酰基、氯乙酰基或氯磺酰基可分别用碳酸氢钠、N-甲基二硫代氨基甲钠或亚硫酸钠脱去。

The side-chain liquid crystal polymacrylate was synthesized by free radical polymerization form the acrylate monomer which was generated from p-hydroxy benzoic acid, ethylene chlorohydrin and acrylic acid by etherification, esterification and chloration.

以对羟基苯甲酸、氯乙醇和丙烯酸为主要原料，经醚化、酯化和酰氯化反应合成了中间体和含液晶基元的丙烯酸酯单体，后者经自由基聚合合成了聚丙烯酸酯侧链液晶聚合物。

Hydroxy benzene acetic acid and acetic acid have biological activity, such as anti-bacterial and other aspects, a wide range of applications.

苯羟基乙酸和苯氧乙酸都具有生物活性，在诸如抗菌等方面具有广泛的应用。

Mandelic acid tends to be very well tolerated, especially compared to other alpha hydroxy acids such as glycolic acid.

扁桃酸往往是非常很好的耐受性，特别是比起其他阿尔法羟基酸如乙醇酸。

Therefore, we started hydroxy benzene acetic acid and acetic acid coordination unit for the nodes of copper, cobalt, cadmium, manganese, zinc coordination polymers of structural chemistry studies.

因此，我们开展了苯羟基乙酸和苯氧乙酸配位单元为节点的铜、钴、镉、锰、锌配位聚合物的结构化学的研究。

Orange in the flavonoids in the intestine into hydroxy benzoic acid and ferulic acid, which can strengthen the role of thyroid suppression thiocyanate, which induce or cause goiter.

橙色的黄酮类化合物在肠道成羟基苯甲酸和阿魏酸，可加强硫氰酸抑制甲状腺，而诱发或导致甲状腺肿大的作用。

The glycyrrhizic acid antigen is prepared through the process including following steps: dissolving glycyrrhizic acid in N, N-dimethyl formamide, dioxane or dimethyl sulfoxide, heliophobically adding N-hydroxy succinimide, reacting with dicyclohexylcarbodiimide at 0-10 deg.c for 2-5 hr; and reacting with carrier protein at normal temperature for 4-6 hr to obtain glycyrrhizic acid antigen.

本发明所提供的甘草酸抗体，是用甘草酸抗原免疫动物，然后从被免疫动物的血清中分离得到的；所述甘草酸抗原按如下过程制备：先将甘草酸溶解在N，N-二甲基甲酰胺、二氧六环或二甲基亚砜中，避光加入N-羟基琥珀酰亚胺，然后在0-10℃条件下与二环己基碳二亚胺反应2-5小时；接着与载体蛋白常温反应4-6小时，得到甘草酸抗原。

Four phenanthroline derivatives of 2-phenyl-imazole [5,6-f]-(1,10) phenanthroline, 2-(4-hydroxy-phenyl)-imazole [5,6-f]-(1,10) phenanthroline, 2-(4-methoxyl-phenyl)-imazole [5,6-f]-(1,10) phenanthroline and 2-(4-formacyl-phenyl)-imazole [5,6-f]-(1,10) phenanthroline were synthesized, and twelve new complexes of europium were then synthesized with these phenanthroline derivatives as the first ligand and butyric acid, n-heptanoic acid and tetradecanoic acid as the second ligand.

合成2-苯基咪唑并[5，6-f]邻菲咯啉，2-（4-苯酚）咪唑并[5，6-f]邻菲咯啉，2-（4-甲氧基苯基）咪唑并[5，6-f]邻菲咯啉和2-（4-甲酰基苯基）咪唑并[5，6-f]邻菲咯啉等4种邻菲咯啉衍生物，并分别以其为第一配体，选择丁酸，正庚酸和十四酸为第二配体合成12种新的铕－邻菲咯啉衍生物－脂肪酸荧光配合物。

Four phenanthroline derivatives of 2-phenyl-imazole [5, 6-f]-(1, 10) phenanthroline, 2-(4-hydroxy-phenyl)- imazole [5, 6-f]-(1, 10) phenanthroline, 2-(4-methoxyl-phenyl)-imazole [5, 6-f]-(1, 10) phenanthroline and 2-(4-formacyl -phenyl)-imazole [5, 6-f]-(1, 10) phenanthroline were synthesized, and twelve new complexes of europium were then synthesized with these phenanthroline derivatives as the first ligand and butyric acid, n-heptanoic acid and tetradecanoic acid as the second ligand.

摘 要：合成2-苯基咪唑并[5， 6-f]邻菲咯啉，2-(4-苯酚)咪唑并[5， 6-f]邻菲咯啉，2-(4-甲氧基苯基)咪唑并[5， 6-f]邻菲咯啉和2-(4-甲酰基苯基)咪唑并[5， 6-f]邻菲咯啉等4种邻菲咯啉衍生物，并分别以其为第一配体，选择丁酸，正庚酸和十四酸为第二配体合成12种新的铕-邻菲咯啉衍生物-脂肪酸荧光配合物。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。