查询词典 catalyzed

The main contents and conclusions are as follows:(1) Synthesis of 1,6-hexamethylenedicarbamate catalyzed by yttrium nitrate Yttrium nitrate was employed as the catalyst in the synthesis of 1,6-hexamethylenedicarbamate from alkyl carbamates.

主要内容和结论如下：(1)硝酸钇为催化剂合成1，6-己二氨基甲酸酯采用硝酸钇作为小分子氨基甲酸烷基酯和1，6-己二胺合成1，6-己二氨基甲酸酯的催化剂。

Synthesis of N-substituted carbametes catalyzed by ionic liquids Ionic liquids were introduced into the syntheses of N-substituted carbamates from alkyl carbamates and amines.

离子液体为催化剂合成N-取代氨基甲酸酯将离子液体引入到小分子氨基甲酸烷基酯和有机胺合成N-取代氨基甲酸酯反应。

A base-catalyzed novel olefination methodology based on elimination of p-toluenesulfonamide:Treatment of diethyl cyanomethylphosphonate with catalytic amount of basegave the corresponding phosphoryl-stabilized carbanion, which added to the carbon-nitrogen double bond of N-tosyl imines.

新形成的氮负离子进一步攫取另一分子膦酸酯的活泼亚甲基氢形成加成产物同时再生出膦酰基稳定的碳负离子。加成产物消除对甲苯磺酰胺，高度立体选择性地得到-α-氰基-β-芳基-乙烯基膦酸二乙酯。

This thesis is concerned with studies on the ring opening reaction catalyzed by gold catalysis via carbon-carbon bond cleavages.

本文主要研究了金催化碳碳键断裂的开环反应，全文共分为三个部分：第一章：对均相金催化研究进行了总结，综述了均相金催化的研究进展。

The alkylation of deuterated benzene with ethylene catalyzed by the dehydrated Cl/FeCl3 ionic liquid was investigated by GC-MS and 1H NMR.

将合成的Cl/FeCl3离子液体脱水，并采用同位素置换的方法研究了离子液体催化全氘代苯与乙烯的烷基化反应机理。

In this thesis, synthesis of fluoroalkyl-containing heterocycles from rhodium acetate catalyzed reactions of fluorinated α-diazo-β-ketoestes were studied in detail.

本论文系统地研究了氟烷基和二氟亚甲基取代的α-重氮羰基化合物的合成及其在醋酸铑催化下的反应。由此合成了一系列氟烷基和少氟取代的杂环化合物。

Dibutyl succinate was synthesized catalyzed by a strong acid cation exchange resin from succinic acid and n-butyl alcohol.

用强酸性阳离子交换树脂催化丁二酸和正丁醇的酯化反应，合成了丁二酸二丁酯。

A method was developed for synthesis of DBP catalyzed with non-proton acid and the result showed that aluminum oxide can be used to synthesize dibutyl phthalate characterized with high reaction activity,good selectivity and high rate of conversion,but less environmental pollution.

通过研究非质子酸催化合成增塑剂邻苯二甲酸二丁酯的方法，探讨了合成的最佳工艺条件。实验结果表明，Al2O3催化酯化合成邻苯二甲酸二丁酯具有反应时间短、反应活性和选择性好、产率高、无环境污染等优点、是理想的合成DBP的催化剂。

This Sm-catalyzed reaction firstly efficiently realized the catalytic cycle in the tandem rearrangement/reduction reaction of α-hydroxy epoxides, and moreover the diastereoselective amplification could be distinctly observed when two C1 epimers in substrate were subjected to this catalytic tandem reaction.

该催化的多功能串联反应，高度非对映选择性地一步控制了含有季碳的三个相邻立体中心，有效地构建了&2-季碳1，3-二醇&结构单元，首次实现了此类重排—还原过程的催化循环，其中对于两个C1位的差向异构体底物，此反应具有明显的非对映选择性放大特点。

The preparation of epoxides by reaction between alkyl peroxides and olefins catalyzed by high-valent transition metal complexes is one of the most important means of preparation of epoxides.

以高价过渡金属配合物为催化剂，催化烯烃直接环氧化反应是合成环氧化合物的重要途径之一。

It also analyzes the feature and development of semi-finish grinding and finish grinding by roller press.

同时进行了辊压机半终粉磨和终粉磨系统的特点和发展分析。

When I got there, water was dripping slowly from the ceiling and forming a pool on the floor.

当我到那里的时候，水是慢慢地从天花板滴而且形成在地板上的一个池。