Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Barton‐Kellogg Olefination
View through CrossRef
Abstract
Coupling of two ketones into alkenes, particularly applicable to the synthesis of moderately to highly hindered alkenes, is generally referred as Barton‐Kellogg olefination. In this reaction, the steric constraints are gradually introduced via sequential processes involving a
1,3‐Dipolar
Cycloaddition
to form five‐membered Δ
3
‐1,3,4‐thiadiazoline, followed by the nitrogen elimination to three‐membered episulfide, and finally the sulfur extrusion to afford the alkenes. Although this reaction can be used for the synthesis of asymmetric alkenes from two different ketones, symmetric alkenes will always be formed as by‐products.
Title: Barton‐Kellogg Olefination
Description:
Abstract
Coupling of two ketones into alkenes, particularly applicable to the synthesis of moderately to highly hindered alkenes, is generally referred as Barton‐Kellogg olefination.
In this reaction, the steric constraints are gradually introduced via sequential processes involving a
1,3‐Dipolar
Cycloaddition
to form five‐membered Δ
3
‐1,3,4‐thiadiazoline, followed by the nitrogen elimination to three‐membered episulfide, and finally the sulfur extrusion to afford the alkenes.
Although this reaction can be used for the synthesis of asymmetric alkenes from two different ketones, symmetric alkenes will always be formed as by‐products.
Related Results
Morphological study of dorsal Barton's fracture based on three-dimensional CT imaging
Morphological study of dorsal Barton's fracture based on three-dimensional CT imaging
Abstract
Background
Dorsal Barton's fracture is a distinct type of distal radius fracture. The treatment of dorsal Barton's fracture is contentious and may lead to severe ...
Julia Olefination
Julia Olefination
AbstractThe multistep preparation of trans‐olefins involving the addition of phenylsulfonyl carbanion to aldehydes or ketones to form β‐hydroxysulfones, followed by the esterificat...
Transition-Metal-Free and Selective Deconstructive Carbonyl Olefination of α-Hydroxy Ketones: A Complementary Approach to Knoevenagel Reaction
Transition-Metal-Free and Selective Deconstructive Carbonyl Olefination of α-Hydroxy Ketones: A Complementary Approach to Knoevenagel Reaction
AbstractWhile the carbonyl olefination has been extensively studied and well documented, use of α-hydroxy ketones as precursors for the carbonyl olefination is not reported, till d...
Takai Olefination
Takai Olefination
AbstractThis reaction is a coupling between aldehydes and geminal dihaloalkanes to form olefins in the presence of chromous chloride and is generally known as the Takai olefination...
An Inverted Paradigm: A Reply to Elisabeth Gidengil
An Inverted Paradigm: A Reply to Elisabeth Gidengil
AbstractThrough a critique of the “internationalist” arguments outlined and defended by Paul Kellogg, Elisabeth Gidengil has mounted a defence of dependency theory as it has been a...
Identity transformation of Josephine Alibrandi and John Barton in the Novel Looking for Alibrandi (by Melina Marchetta)
Identity transformation of Josephine Alibrandi and John Barton in the Novel Looking for Alibrandi (by Melina Marchetta)
<p>This paper examines the progress of identity transformation of Josephine Alibrandi and John Barton in the novel Looking for Alibrandi. Josephine and John come from differe...
El futuro de la educación cívica. Entrevista con Keith C. Barton
El futuro de la educación cívica. Entrevista con Keith C. Barton
In this interview with researcher Keith Barton, a critical reflection is offered on the teaching of social studies and civic education in recent decades. Barton, author of Teaching...
Reading and Community as a Support for the New in Elizabeth Gaskell’s Mary Barton
Reading and Community as a Support for the New in Elizabeth Gaskell’s Mary Barton
This chapter illustrates Elizabeth Gaskell's originality and success, and shows how she used her understanding of literary tradition to articulate and develop her new female point ...