环加成

此外，该交联聚合物纳米粒子可用于催化CO2与环氧化合物的环加成反应，催化反应活性高，选择性好。

Moreover , the cross-linked polymeric nanoparticles were highly active and selective catalysts for the cycloaddition reaction of carbon dioxide to epoxides .

综述了手性二茂铁膦配体的过渡金属配合物催化不对称氢化、硅氢化、交叉偶联、环加成、Aldol等反应的最新进展，参考文献56篇。

Recent progress in the asymmetric hydrogenation , hydrosilylation , cross . coupling , cycloaddition , Aldol reaction etc. catalyzed by complexes of transition metal with chiral ferrocene ligands containing phosphorus atoms was reviewed with 56 references .

C（60）与N-羧甲基脱氢枞胺的1,3-偶极环加成反应研究

Study on 1,3-Dipolar Cycloaddition of C_ ( 60 ) with N-Carboxymethyl Dehydroabietylamine

NHC-CO2催化CO2与环氧化物环加成反应的设计与研究

Study on NHC-CO_2 for the Coupling of Carbon Dioxide with Epoxides

金鸡纳碱季铵盐促进的CO2与环氧化合物的不对称环加成反应

Cinchona-Derived Quaternary Ammonium Salts-Improved Asymmetric Cycloaddition of CO_2 to Epoxides

高效Ni/Zn催化剂体系固定CO2与环氧化合物的环加成反应

An Efficient Ni / Zn Catalyst System for the Chemical Fixation of CO_2 with Epoxides

手性Lewis酸催化硝酮与烯烃的1,3-偶极环加成反应

Chiral Lewis Acid-Catalyzed 1,3-Dipolar Cycloadditions between Nitrones and Alkenes

在CO2化学固定方面，利用二氧化碳和环氧化物环加成得到五元环状碳酸酯是最具前景的方法之一。

One of the promising methodologies in chemical CO2 fixation is the cycloaddition between carbon dioxide with epoxides to afford the five-membered cyclic carbonates .

本论文从CO2的催化活化着手，研究在超临界状态下CO2和环氧烷烃的环加成反应。

The present thesis originates from catalytic activation of CO2 , and studies the cycloaddition of CO2 with epoxides to produce corresponding cyclic carbonates under supercritical conditions .

我们通过这一思路设计合成的新型氮氧配体在不对称Mannich反应、不对称Michael加成和不对称1,3-偶极环加成中都表现出了较好的不对称催化效果。

The applications of novel N , O-ligands in catalysed asymmetric Mannich addition , Michael addition and 1,3-dipolar cycloaddition are developed .

用ABINITIO方法在MP2/6-31G水平上研究了C，N-二甲基硝酮与丙烯的1,3-偶极环加成反应历程及区域选择性。

The 1,3-dipolar cycloaddition reaction of C , N-dimethyl nitron with propylene has been calculated at the MP2 / 6-31G level using ab initio molecular orbital theory .

研究了松油烯与马来酸酐的分子间Diels-Alder环加成反应和松油烯的异构转化行为。

The Diels-Alder reaction of terpinenes and maleic anhydride and isomerization action of Terpinene is studied .

乙氧基化是在催化剂的催化作用下，环氧乙烷（EO）与含有活泼氢的化合物发生的开环加成反应，是工业中生产聚氧乙烯醚型非离子表面活性剂的重要方法。

Ethoxylation is significant in the polyoxyethylene ether nonionic surfactants industry that are base-catalyzed reactions of hydrophobic substrates containing active hydrogen .

我们首次研究了富电子二烯1-氨基蒽与单壁碳纳米管的Diels-Alder环加成反应的选择性。

Selectivity for Diels-Alder cycloaddition reaction of the electron-rich diene with single-walled carbon nanotubes was first investigated .

用半经验AM1方法研究了C（60）与单态二氯卡宾环加成反应的反应机理。

The cycloaddition reaction of dichlorocarbene with C60 has been studied by using the semi-empirical method AM1 . A reasonable mechanism of the reaction has been suggested .

本论文主要合成了手性恶唑硼烷酮催化剂，它对1-3偶极环加成和不对称Aldol反应具有良好的催化效果。

It was very efficient with perfect enantioselectivity when used in asymmetric 1 , 3-dipolar cycloaddition and asymmetric Aldol reactions .

新型Hoffmann消除-Diels-Alder环加成串联反应的研究和新型嘧啶并环分子构架的设计与合成

Studies of a Novel Tandem Hoffmann Elimination-Diels-Alder Cyclization and Design and Synthesis of Novel Pyrimidine-fused Heterocyclic Scaffolds

5,6-二溴甲基苯并咪唑是Diels-Alder环加成反应形成含杂原子的C60衍生物的重要中间体。

5,6-Bis ( bromomethyl ) benzimidazole is an important intermediate for making heterocyclic of [ 60 ] fullerene derivatives in Diels Alder reaction .

乙氧基化（Ethoxylation）是环氧乙烷（EO）与含有活泼氢的化合物发生开环加成的反应，常用于生产非离子表面活性剂。

Ethoxylation is used to produce nonionic surfactants that are ring-opening addition reactions of hydrophohic substrates containing active hydrogen with ethylene oxide .

烯酮和亚胺[2+2]环加成产生β-内酰胺的反应，被称作Staudinger反应。

The reaction of ketene and imine [ 2 + 2 ] cycloaddition to yield β - lactam is called Staudinger reaction .

反应中，这两个反应物同时把自己的HOMO电子填入对方的LUMO轨道，这与传统的4+2环加成机理不同。

In reaction , each reactant gives its electrons in HOMO to the LUMO of other reactant simultaneously , which is different from the conditional mechanism of 4 + 2 cycloaddition .

423～433K为环加成反应的最佳温度区间；

423K to 433K is the optimum temperature range .

该催化剂可以催化多种环氧化物，且催化剂易分离回收，可重复使用多次，同时探讨了该催化剂上CO2环加成合成环碳酸酯的可能机理。

The catalyst is applicable to a variety of epoxides , producing the corresponding cyclic carbonates in good yields . Furthermore , the catalyst could be recovered easily and reused for several times . A plausible mechanism for synthesis of cyclic carbonate in the presence of PS-QPS was discussed .

目前合成β-内酰胺的通用方法是烯酮和亚胺进行[2+2]环加成反应，又称Staudinger反应。

The current common synthetic method of β - lactams is through ketene and imine [ 2 + 2 ] cycloaddition reaction , which is also known as the Staudinger reaction .

阐述了利用环氧丙烷和甲醇在催化剂HM-9512存在下，通过选择性开环加成制备1-甲氧基-2-丙醇的工艺过程。

A process for preparing 1-methoxy-2-propanol by selective ring cleavage-addition reaction of propylene oxide with MeOH in the presence of HM-9512 catalyst is described .

利用二茂铁重氮酮1a和5个亚胺2进行[2+2]环加成反应，得到了一系列空间上存在顺反异构的β-内酰胺化合物3a-e，产率为50-86%。

Ferrocenyl diazo ketone 1a was reacted with five imines 2 via the [ 2 + 2 ] cycloaddition reaction , giving a series of β - lactam diastereoisomers 3a-e , with yields of 50-86 % .

本文综述了近年来对水介质中的有机反应的研究成果，包括缩合反应、亲核加成反应、环加成反应、Barbier反应和多组分反应等，及其在有机合成中的应用研究进展。

In this paper , the recent progress of organic reactions in aqueous media , such as condensation reaction , nucleophilic substitution reaction , cycloaddition reactions , Barbier-type and multi-component reaction , and their applications are reviewed .

保持和热反应条件相同的反应温度和物料比，用功率为500W的微波对体系进行辐射，[1+2]氮烯环加成反应消耗时间从24h缩短到1.5h，得率从42.8%提高到59.9%；

Keeping the same temperature and proportion , the admixture was radiated by 500 W microwaves . The time of [ 1 + 2 ] cycloaddition was shorten from 24 h to 1.5 h , while the yield was raised from 42.8 % to 59.9 % .

Staudinger反应（也称作Staudinger环加成反应或烯酮-亚胺环加成反应）是合成β-内酰胺类物质的主要方法。β-内酰胺是一些抗生素的关键结构和合成中间体。

The Staudinger reaction ( also called the Staudinger cycloaddition or the ketene-imine cycloaddition ) is a versatile method to synthesize very important β - lactams , which are key structural elements in some antibiotics and synthetic intermediates as well .

吡啶叶立德与查尔酮1,3-偶极环加成反应制备2-苯基-3-乙酰基中氮茚

1,3-Dipolar Cycloaddition of Pyridinium Ylides to Chalcone for Preparation of 3-Acetyl-2-phenyl-indolizine