丁基

Benzoin condensation using imidazolium based ionic liquids as solvent for the first time has been successfully achieved. The reaction conditions have been studied in detail. When under 65 and with 0.5 equiv. NaOH in ionic liquid l-butyl-3-methyl-imidazolium tetraborate, benzoin was obtained in excellent yield of 91%. Recycling of ionic liquid has been available.

首次探索并成功实现了在咪唑鎓盐离子液体中进行苯偶姻缩合反应，详细探讨了反应条件，当反应在65℃下和0.5当量NaOH存在下以及在离子液体4-丁基-1-甲基咪唑鎓四氟硼酸盐中进行时，苯偶姻产率可达91％；并对离子液体进行了有效回收再利用。

Compared with TEA,TiBA activated system produced more blocky copolymer,but the blockiness of its block fraction is lower.

与三乙基铝相比，三异丁基铝为助催化剂得到的不溶级份含量及丙烯含量都较高，但其嵌段性却较低。

Firstly, 24 chiral Schiff base ligands were prepared and evaluated for theasymmetric HDA reaction between Brassard diene with benzaldehyde. Theresults revealed that the ligand derived from 3,5-di-tert-butylsalicylaldehydewith (1R,2S)-2-amino-1,2-diphenyl-1-ethanol shows an excellent chiralinduction in the reaction.

首先合成了 24 个手性三齿席夫碱配体，并应用于 Brassard 二烯与苯甲醛的不对称 Hetero-Diels-Alder 反应，结果表明，3，5-二叔丁基水杨醛与(1R，2S)-1，2-二苯基-2-氨基-乙醇生成的单席夫碱显示出优秀的手性诱导能力。

The polymerization of butadiene in benzene in the presence of titanium tetraiodide triisobutyl aluminium catalyst has been studied.

研究了丁二烯在苯中有四碘化钛-三异丁基铝催化剂的存在下的聚合。

Thd polymerization of butadiene in benzene in the presence of titanium tetraiodide triisobutyl aluminium catalyst has been studied.

研究了丁二烯在苯中有四碘化钛-三异丁基铝催化剂的存在下的聚合。

Abstract］ Objective To study the problems and treatments in butyl rubbers application.

摘要］ 目的探讨丁基胶塞使用中存在的问题及解决办法。

Methods To summarize the application of butyl rubber in our preparation department in the last three years.

对三年来我院制剂室丁基胶塞的使用情况进行总结。

The machine is used for coating butyl sealant evenly on two sides of alu-space-frame.

该机是在铝间隔框两侧均匀涂丁基热熔胶的专用设备。

In this thesis, we developed chiral proton N-O type ligands and employed them in the enantioselective addition of diethylzinc to N-diphenylphosphinoyl imines. The relationship between the structure of the ligands and the enantioselectivity was systematically studied. Furthermore, enantioselective butylation of N-diphenylphosphinoyl imines withBu〓Zn and enantioselective diphenylzinc addition to imine were also examined.

本文致力于亚胺的不对称催化有机锌试剂加成反应的研究：以手性质子型N-O配体为促进剂，对N-二苯基次膦酰亚胺进行不对称乙基锌加成反应而展开研究工作，系统地考查了手性配体的结构对反应的影响；另外，对N-二苯基次膦酰亚胺的不对称催化丁基锌加成进行了研究，并首次对亚胺的不对称苯基锌加成反应进行了初步探索。

Catalytic action of metal ions, especially cerium ion, in the decomposition of t-butyl hydroperoxide was investigated.

本文研究了金属离子，特别是铈离子在叔-丁基过氧化氢分解反应中的催化性能。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。