Topic
Alkylation
About: Alkylation is a research topic. Over the lifetime, 29915 publications have been published within this topic receiving 464944 citations. The topic is also known as: alkylation reaction.
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TL;DR: In this tutorial review, recent progress in the development of chiral Brønsted acid-catalyzed asymmetric Friedel-Crafts reactions is presented.
Abstract: The asymmetric Friedel–Crafts reaction is one of the most powerful methods to synthesize optically active aromatic compounds. Particularly, the Friedel–Crafts alkylation of arenes with unsaturated compounds activated by chiral Bronsted acids provides direct access to enantiopure aromatic derivatives with perfect atom economy. In this tutorial review, recent progress in the development of chiral Bronsted acid-catalyzed asymmetric Friedel–Crafts reactions is presented.
645 citations
618 citations
TL;DR: In this article, the synthesis of amines by the amination of alcohols, by means of the so-called borrowing hydrogen methodology, is presented Compared to other synthetic methodologies for the synthesis, these transformations are highly attractive because often alcohols are readily available starting materials, some of them on a large scale from renewable sources.
Abstract: In this Minireview, the synthesis of amines by the amination of alcohols, by means of the so-called borrowing hydrogen methodology, is presented Compared to other synthetic methodologies for the synthesis of amines, these transformations are highly attractive because often alcohols are readily available starting materials, some of them on a large scale from renewable sources In addition, the amination of alcohols produces water as the only by-product, which makes the process potentially environmentally benign Already today, lower alkyl amines are produced in bulk by the chemical industry with this synthetic method In particular, the recent progress applying organometallic catalysts based on iridium, ruthenium, and other metals will be discussed Notable recent achievements include the conversion of challenging substrates such as diols, the development of recyclable catalysts, milder reaction temperatures, and the direct alkylation of ammonia or its equivalents with alcohols
597 citations
TL;DR: Recent developments in the design and use of catalytic and stereoselective strategies for the alkylation of aromatic systems and synthesis of a wide range of polyfunctionalized enantiomerically enriched compounds are reviewed.
Abstract: After more than 125 years, the Friedel-Crafts alkylation is still one of the most studied and most utilized reactions in organic synthesis. What is the secret of this astonishing success? Perhaps the great versatility in scope and applicability continues to justify its crucial role in the synthesis of more and more complex molecules. However, it has taken more than a century for asymmetric catalytic versions of this reaction to be developed and subsequently extended to a range of aromatic compounds and alkylating agents. Herein we review recent developments in the design and use of catalytic and stereoselective strategies for the alkylation of aromatic systems and synthesis of a wide range of polyfunctionalized enantiomerically enriched compounds.
591 citations