二羟基甲苯

By using a mixture of aromatic hydrocarbon and water as a binary solvent,reaction of pyrogallol with PhCCl 3 was carried out in the presence of a catalyst(ZnCl 2?AlCl 3 or SOCl 2).2,3,4-Trihydroxybenzophenone was obtained in yields of 80%-87% with the advantages of easy control,stable yield,high product quality and low cost.

以焦性没食子酸为起始原料，在惰性气体保护和催化剂(ZnCl2、AlCl3或SOCl2)的存在下，在芳香烃与水组成的二元混合溶剂中，与三氯甲苯反应，经过芳香烃溶剂的后处理，可以得到2，3，4-三羟基二苯酮，产率最高达87%。

In this paper, we designed and synthesized a molecule of compound 1, 2-(benzooxazol-2-yl)-5-4-(3-(benzothiazol-2-yl) phenylamino-6--1,3,5-triazin-2-ylaminophenol, which can only assembled into an organogel upon a short irradiation with ultrasound in toluene-methanol mixed solvent. DSC, XRD and IR were used to detect the properties and mechanisms of the organogel.

本论文中，我们设计合成了一个有机小分子化合物1，4-氨基（2-羟基苯基）苯并噁唑3-氨基苯基苯并噻唑二辛基胺缩三聚氯嗪，研究发现，在甲苯/甲醇=1：2的混合溶剂中，只有利用超声才能使之形成凝胶，加热冷却的方法不能形成凝胶，而形成针状结晶。

In this paper,the toluene -2,4-diisocyanate and trimethylol-propane are usedto synthetize curing agent for polyurethan.

本文用2，4－甲苯二异氰酸酯和三羟甲基丙烷为原料合成聚氨酯固化剂，用该固化剂固化含羟基的树脂。

Pentanediol reacted with phosphorus tribromide to make it mono-bromination, under the catalytic action of PPTs it reacted with 2,3-dihydropyran to protect another hydroxy group, then to react with triphosphine, produced quarterphossal.

再以1，5-戊二醇为原料，三溴化磷使之单溴代，得到5-溴-1-戊醇，在对甲苯磺酸吡啶盐的催化下与2，3-二氢吡喃反应保护其另一端的羟基，与三苯基膦反应生成季磷盐。

Kinetics of hydroxyl-terminated polybutadiene/ phenyl isocyanate, bonding agent (BA-5)/PI and antioxidant H/PI were studied in toluene/dimethyl sulphoxide solution. The rate constants and the activation parameters were calculated. The results show that the reactionary rate of these three active hydrogen components decreased in same condition.

分别对端羟基聚丁二烯/苯异氰酸酯，键合剂(BA-5)/PI和防老剂H（N，N'-二苯基对苯二胺）／PI在甲苯／二甲基亚砜混合溶液体系中进行了反应动力学研究，计算了相应体系的反应速率和活化能。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。