三苯甲基

The general formula of said soluble fluorine- containing aromatic medlin is as follows: the substituent group on side phenyl group in diamine monomer Ar includes methyl, trifluoromethyl, two trifluoromethyls or chlorine and trifluoromethyl.

可溶性含氟芳香聚酰亚胺具有如下通式：二胺单体Ar中苯侧基上取代基为甲基、三氟甲基、两个三氟甲基或者氯和三氟甲基。

During the manufacturing of the critical intermediate cephalosporin nucleus --7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt, first the feasibility of the one-pot synthetic route of open loop, closed loop and ozonization when chlorine is passed over is qualified by experiments. Then the critical factors that will influence this reaction are studied as follows: the mol ratio of triphenyl phosphite and Diphenylmethyl 3-hydroxy-7-phenylacetaminoceph-3-em-4-carboxylate-l-oxide is four to one; the quantity of the stablizer should be at least more than two to one. The temperature of the system must be 25℃ when chlorine is passed over so that the hydrochloride can be precipitated to obtain cephalosporin nucleus of cefaclor--7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt.

在制备关键中间体头孢母核7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐时，先通过实验验证把开环、闭环、臭氧化三步在通入氯气时并为一锅煮的合成路线的可行性之外，又研究了影响该反应的几个重要因素：亚磷酸三苯酯与3-羟基-7-头孢烷-5-亚砜-2-甲酸二苯甲酯的摩尔比为4：1；稳定剂2-甲基-2-丁烯的用量至少大于2：1，通入氯化氢气体时体系温度在25℃时盐酸盐则能够顺利析出，获得头孢克洛的头孢母核—7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐。

In the derivatives of 2-(4-bromobenzyl-amino)-4-methyl-6-trifluoromethyl-1, 3, 5 triazine, the atoms of N(8), C (9) were the important active parts, it was considered to bind to the different amino acid residue at the D1 protein as traditional striazine herbicides.

对于2-（4-溴苄氨基）－4-甲基－6-三氟甲基－1，3，5-三氮苯中，N(8)和C(9)是重要的活性部位，和传统的均三氮苯类除草剂分子相比，与D1蛋白上不同的氨基酸残基发生了键合作用。

Study on an efficient process for the preparation of trifloxystrobin starting from 2-methylacetophenone bypartial oxidation,esterification,reaction with methoxyamine,bromization and condensation with 3'- acetophenone oxime.

以邻甲基苯乙酮为原料，经过高锰酸钾的碱性氧化，甲醇酯化，再与甲氧基胺盐酸盐肟化后，用N-溴丁二酰亚胺溴化，最后和间三氟甲基苯乙酮肟缩合得到目标产物肟菌酯。

The method comprises following steps: taking diphenol and 3- trifluoromethyl- 4- chloronitrobenzene as raw material, salt precipitating for diphenol and potash, refluxing with water- containing toluene, reacting with 3- trifluoromethyl- 4- chloronitrobenzene and getting dinitro monomer; taking dinitro monomer, ferro powder and HCl as raw material, ethanol and water as disslovant for refluxing and ethanol recrystallization, getting fluorine- containing aromatic diamido monomer.

合成方法是以二酚与3-三氟甲基-4-氯硝基苯作原料，先将二酚与碳酸钾成盐，甲苯带水回流反应，然后与3-三氟甲基-4-氯硝基苯反应制得二硝基单体；再以二硝基单体，铁粉，HCl为原料，乙醇和水做溶剂，回流反应、乙醇重结晶，得到含氟芳香二胺基单体。

The formulations for the synthesis of alkyds resin were designed based on the molecular ratio of the phthalic anhydride and trimellitic anhydride.

以脂肪油、邻苯二甲酸酐、偏苯三酸酐和三羟甲基丙烷为主要原料合成了水分散性醇酸树脂。

Water-soluble air drying alkyd resin is formulated by flax oil acid,trimethylol propane,dimethyl isophthalate,benzoic acid,maleic anhydride and trimellitic anhydride.

以亚麻油酸、三羟甲基丙烷、间苯二甲酸、苯甲酸、顺丁烯二酸酐、偏苯三酸酐为原料合成水溶性醇酸树脂，中和后制得的涂料具有干性好、硬度高、耐水性和贮存稳定性优良等特性。

The latter is chlorinated in the side chains under free-radical conditions to give 2,4-dichloro-5-fluoro-3-dichloromethyl-1-trichloromethylbenzene. The latter is hydrolysed via 2,4-dichloro-5-fluoro-3-dichloromethylbenzoic acid, which can be isolated if necessary, to give 2,4-dichloro-5-fluoro-3-formyl-benzoic acid, the aldehyde group of which is reacted to give 2,4-dichloro-5-fluoro-3-N-hydroxyiminomethyl-benzoic acid, from which, with simultaneous conversion of the carboxyl group into the chlorocarbonyl group, water is eliminated using an acid chloride to give the nitrile 2,4-dichloro-3-cyano-5-fluoro-benzoyl chloride.

随后，在游离基条件下进行侧链的氯化，得到2，4-二氯-5-氟-3-二氯甲基-1-三氯甲基苯、后者被水解，经过2，4-二氯-5-氟-3-二氯甲基苯甲酸(如果需要此化合物可以分离)，得到2，4-二氯-5-氟-3-甲酰苯甲酸，将其醛基反应，得到2，4-二氯-5-氟-3-N-羟基亚氨基甲基苯甲酸，用酰氯从其中除去水，同时将羧基转化为碳酰氯，得到一种腈，即2，4-二氯-3-氰基-5-氯-苯甲酰氯。

It discloses four kinds of diamino monomers such as 1, 4-(4- amnio- 2- trifluoromethyl- phenoxy)- 2-(3'-methyl phenyl)benzene containing fluorine, ether linkage and benzene side chain.

具体公开了四种含氟、醚键和苯侧基的1，4-(4-胺基-2-三氟甲基-苯氧基)-2-(3'-甲基苯基)苯等二胺基单体。

M Trifluoromethylacetophenone was synthesized by the reaction of acetic anhydride with the Grignard reagent of 3 bromo benzene prepared from trifluoromethylbenzene , in 40% overall yield.

以三氟甲基苯为原料，经过溴化、格氏反应后与乙酸酐反应合成间三氟甲基苯乙酮，总收率40%。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。