Alkylation - Wikipedia
网页Alkylation is a chemical reaction that entails transfer of an alkyl group. The alkyl group may be transferred as an alkyl carbocation, a free radical, a carbanion, or a carbene (or their equivalents). [1] Alkylating agents are reagents for effecting alkylation. Alkyl groups can also be removed in a process known as dealkylation.
烷基化反应 - 百度百科
网页烷基化反应（Alkylation reaction）指向 有机物 分子中的碳、氮、氧等原子中引入 烷基 (-R)的反应，简称烷基化。. 常用的烷基化剂有 烯烃 、卤代烷烃、硫酸烷酯和 醇 等。. 烷基化是 有机合成 的重要反应之一。. 例如 苯 与卤代烷烃反应，可在苯环上引入烷基 [1 ...
4.10: Alkylation and Acylation of Aromatic Rings - The Friedel …
网页2020年6月21日 · show how alkyl halides and acylhalides can be used as alkylating agents in Friedel-Crafts alkylation reactions. discuss the limitations of the Friedel-Crafts alkylation reaction, paying particular attention to the structure of the alkyl halide, the structure of the aromatic substrate and the problem of polyalkylation.
Alkylation - an overview | ScienceDirect Topics
网页Alkylation is the migration of an alkyl substituent from one molecule to another via an alkyl carbocation, a carbanion, a free radical, and a carbene, which are generated from electrophilic alkylating agents such as olefin and alkyl halide in the presence of a strong mineral acid or Lewis acid like metal oxide catalysts.
Alkylation - an overview | ScienceDirect Topics
网页Alkylation is defined as the process of attaching an alkyl group to a selected molecular structure, often involving the replacement of a hydrogen atom with an alkyl group derived from an alkyl halide. AI generated definition based on: Organic Chemistry (Second Edition), 2018. About this page.
16.3 Alkylation and Acylation of Aromatic Rings: The …
网页Among the most useful electrophilic aromatic substitution reactions in the laboratory is alkylation —the introduction of an alkyl group onto the benzene ring. Called the Friedel–Crafts reaction after its founders in 1877, Charles Friedel and James Crafts, the reaction is carried out by treating an aromatic compound with an alkyl chloride ...
Alkylation - an overview | ScienceDirect Topics
网页There are six types of alkylation reaction: (1) substitution for hydrogen bound to carbon, such as ethylbenzene (C 6 H 5 C 2 H 5) from benzene (C 6 H 6) and ethylene (CH 2 CH 2), (2) substitution for hydrogen attached to nitrogen, (3) substitution for hydrogen in a hydroxyl group of an alcohol or phenol, and (4) addition to a tertiary amine to ...
Alkylation - Chemistry LibreTexts
网页2022年2月28日 · An alkylation is a reaction or a reaction sequence that introduces one or more alkyl groups to a molecule by replacing hydrogen atoms or lone pairs with alkyl groups. eg. 1: eg. 2:
16.4: Alkylation and Acylation of Aromatic Rings - The Friedel …
网页2024年8月28日 · Among the most useful electrophilic aromatic substitution reactions in the laboratory is alkylation —the introduction of an alkyl group onto the benzene ring. Called the Friedel–Crafts reaction after its founders in 1877, Charles Friedel and James Crafts, the reaction is carried out by treating an aromatic compound with an alkyl chloride ...
Alkylation Reactions | Development, Technology - METTLER …
网页Alkylation is a chemical process by which an alkyl group is attached to an organic substrate molecule via addition or substitution. An alkyl group is an alkane molecule that is missing a hydrogen atom. For example, methyl groups are the simplest alkyls and result from the removal of a hydrogen atom from methane.