环加成反应

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B3LYP/6-31G水平上对高压诱导的叠氮化合物与缺电子烯烃以及富电子烯烃间的1,3-偶极环加成反应进行了研究。

High-pressure induced 1,3-dipolar cycloadditions of azides with both electron-deficient and electron-rich olefins are studied .

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

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 .

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 .

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 .

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 .

423～433K为环加成反应的最佳温度区间；

423K to 433K is the optimum temperature range .

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 .

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

异氰在1，3-偶极环加成反应中的应用

The Application of Isocyanides in the 1 , 3-Dipolar Cycloaddition Reactions

含吡唑基查尔酮的[2+2]环加成反应研究

Study on the [ 2 + 2 ] cycloaddition of Pyrazol-chalcones

1,3-偶极环加成反应合成Δ~2-吡唑啉羧酸类化合物

Synthesis of Δ ~ 2-Pyrazoline Carboxylate Derivatives via 1,3-Dipolar Cycloaddition

用环加成反应合成含氟杂环化合物的研究

Studies on Synthesis of Fluorine-containing Heterocycles via Cycloaddition Reaction Strategy

氧化腈与丙炔1,3-偶极环加成反应中区域选择性的理论研究

Theoretical Study on the Regioselectivity of Nitrile Oxide 1,3-Dipolar Cycloaddition to Propyne

[60]富勒烯环加成反应研究进展

The Progress and Future Prospects of Cycloaddition to [ 60 ] Fullerene

硝酮与单取代烯的1，3-偶极环加成反应的理论研究

A Theoretical Study on the 1,3-Dipolar Cycloaddition of Nitrones with Mono Substituted Alkenes

固相载体上的环加成反应及其应用

Cycloaddition Reactions on Solid Phase Supports and Their Applications

1,3-偶极环加成反应在有机合成方面的新进展

Recent Progress on 1,3-Dipolar Cycloaddition Reactions in Organic Synthesis