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Updated: May 20, 2026

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
06:46

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate

Published on: June 21, 2017

シリレン移転によるダイエンとアルデヒドから7つ環のトランスアルケンの二酸化選択合成

Margaret A Greene1, Michel Prévost, Joshua Tolopilo

  • 1Department of Chemistry, New York University, New York, New York 10003, United States.

Journal of the American Chemical Society
|July 12, 2012
PubMed
まとめ

シルバー触媒は,地域選択性シリレンをアルケーンに移し,ビニルシリサイクロプロパンを生成する. これらの中間物質は,アルデヒドの添加によって7基のトランスアルケンを生成し,再配列および添加反応において高い反応性を示します.

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Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
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[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

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Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
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Diels–Alder Reaction: Characteristics of Dienes

The Diels–Alder reaction brings together a diene and a dienophile to form a six-membered ring. Both components have unique characteristics that influence the rate of the reaction.
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is more stable, the...
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Preparation of Epoxides

Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
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