以2，4-二羟基苯甲酸甲酯为原料，经过氯代反应、水解反应、脱羧反应合成2，4-二氯间苯二酚。
The compound 2,4-dichlororesorcinol was obtained from the starting material 2,4-dihydroxybenzoate via chlorinated reaction, hydrolysis and decarboxylation.
本发明的主题是由相应的二羟基苯二磺酸制备二羟基苯二磺酸金 属盐、优选二羟基苯二磺酸碱金属盐的方法。
The subject matter of this invention is a method for preparing metallic dihydroxybenzenedisulfonates, preferably from alkaline metals, from corresponding dihydroxybenzenedisulfonic acids.
研究了新显色剂2 ，4 二羟基苯甲醛缩氨基硫脲（DBT ）与铜的显色反应，建立了光度法测定微量铜的新方法。
A new method for the spectrophotometric determination of trace copper with 2,4 dihydroxybenzaldehyde thiosemicarbazone(DBT) is reported in this paper.
赤芍主要挥发成分为（Z, Z）-9, 12-十八碳二烯酸，正十六碳酸和2-羟基苯甲醛。
The main volatile chemical components of RPR are(Z, Z)-9,12-octadecadienoic acid, n-hexadecanoic acid and 2-hydroxy-benzaldehyde.
换句话说，他司美琼不仅仅只是起到安定和羟基安定这样的苯（并）二氮类药物的镇定作用。
Tasimelteon is not, in other words, merely acting as a sedative in the way that benzodiazepines such as diazepam and temazepam do.
研究表明，棓酰类多元酚可与铝形成络合物，其络合物是铝和棓酰基中苯三酚的邻位二羟基形成的，它是稳定的五员螯合环结构；
It is show that the complexes of galloyl type hydrolysable tannins with aluminum are formed which involve five-member ring stably formed adjacent hydroxyl groups in galloyl to aluminum atoms.
对铁基复合氧化物催化苯酚羟基化合成苯二酚反应过程酚焦油的生成反应进行了模拟研究。
The simulating study of the formation and inhibition of phenolic tars in the process of diphenols preparation by hydroxylation of phenol with iron-based composite oxides as catalyst was conducted.
对铁基复合氧化物催化苯酚羟基化合成苯二酚反应过程中酚焦油的生成机理进行了研究。
The mechanism for the formation of phenolic tars in the process for the preparation of diphenols by the hydroxylation of phenol using iron-based composite oxides as catalyst was studied.
用8羟基喹啉、甲醛、间苯二酚及苯磺酸钠作原料合成了一种螯合树脂。
Formaldehyde 8 hydroxyquinoline sodium benzene sulfonate resorcinol copolymer described as chelating ion exchange resin was synthesized.
在选定的色谱操作条件下，2-（4-羟基苯氧基）丙酸与杂质对苯二酚等之间具有良好的分高效果。
Under the selected conditions of the chromatographic operation, there was the better separation efficiency between 2-(4- hydroxyphenoxy) propionic acid and impurities(such as hydroquinone, etc).
邻苯二甲酸的两个羧基上的羟基会发生缩水反应，最终生成邻苯二甲酸酐。
The condensation reaction takes place between the two hydroxyl of phthalic acid, and the phthalic acid be converted into phthalic anhydride finally.
综述了显色剂二羟基二苯砜的合成及精制方法、不同合成工艺的优缺点。
The synthesis and purification methods of dihydroxydiphenylsulfone as a developer were reviewed with 22 references, the advantages and disadvantages of different technologies were discussed.
采用酶学动力学方法研究2-羟基-4-甲氧基苯甲醛（HMB）对酪氨酸酶的单酚酶和二酚酶活力的抑制效应。
The inhibition effect of 2-hydroxy-4-methoxy-benzaldehyde(HMB)on the activity of monophenolase and diphenolase contained in tyrosinase was studied using enzymological kinetic method.
结果分离鉴定了2个二苯酮化合物，其结构分别为2 甲氧基- 3， 4 -亚甲二氧基-二苯酮（I）， 4 羟基-2， 6 -二甲氧基-二苯酮（II）。
Results A new benzophenone was isolated and identified as 2-methoxy-3,4-methylenedioxy-benzophenone (I), along with a known compound 4-hydroxy-2,6-dimethoxy-benzophenone (II).
本工作对两种常见的商品紫外吸收剂——2-羟基-4-甲氧基二苯甲酮（UV-9）和2.4-二羟基二苯甲酮（UV-0）在基态和激发态时的离解常数进行了测定。
In this paper the pK values of both commonly commercial UV-absorbers-2- hydroxy-4-methoxy-benzophenone (UV-9) and 2,4-dihydroxy-benzophenone (UV-0) at ground and excited states have been determined.
方法以价格低廉的国产试剂2，6-二特丁基酚为原料，选择乙酸-水为反应介质，合成关键中间体3，5-二特丁基-4-羟基苯甲醛，并研究了乙酸-水配比对反应的影响；
METHODS 3,5-di-tert-butyl-4-hydroxy benzaldehyde was synthesized from 2,6-di -tert-butyl phenol in a reaction medium of acetic acid-water which its ratio was investigated.
标题化合物C24H22N2O2是由N-（4-羟基苯亚甲基）喹啉-5-胺和5，5-二甲基-1，3-环己二酮在氯化三乙基苄基铵（TEBAC）催化下以水作溶剂反应而得。
The title compound C24H22N2O2 has been synthesized by the reaction of N-arylidenenaphthalen-2-amine with 5,5-dimethyl-1,3-cyclohexadione water catalyzed by triethylbenzylammonium chlorideTEBAC.
一种间乙氧基二苯胺的制备方法，其特征是依次包括以下步骤：1）、由苯胺与间苯二酚进行反应，生成间羟基二苯胺；
The invention discloses a method for preparing m-oxethyl diphenylamine, which comprises the following steps in turn: 1) aniline and m-dihydroxybenzene are reacted to generate m-hydroxyl diphenylamine;
一种间乙氧基二苯胺的制备方法，其特征是依次包括以下步骤：1）、由苯胺与间苯二酚进行反应，生成间羟基二苯胺；
The invention discloses a method for preparing m-oxethyl diphenylamine, which comprises the following steps in turn: 1) aniline and m-dihydroxybenzene are reacted to generate m-hydroxyl diphenylamine;
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