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Updated: Jul 31, 2026
06:46
Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
[C. E. Alken (1909-1986) and the Alken-Prize]
1, Kraichgaustr. 13, 76669, Bad Schönborn, Deutschland. fam@konert-home.de.
Der Urologe. Ausg. A
|May 11, 2016
Summary
Professor C. E. Alken is recognized as a pivotal figure in German urology
Area of Science:
- Urology
- Medical History
Background:
- Details the career trajectory of C. E. Alken, a key figure in post-WWII German urology.
- Highlights his academic appointments, including a teaching assignment in 1948 and the establishment of a Chair of Urology in 1952 at Saarland State University Homburg.
Discussion:
- Explores C. E. Alken's significant contributions to the advancement and autonomy of the field of urology.
- Discusses his influence on the development of urological practices and education in Germany.
Key Insights:
- C. E. Alken's academic progression culminated in an Ordinariat in 1958.
- The establishment of the "Alken-Prize" in his honor underscores his lasting legacy and impact on urology.
Outlook:
- The "Alken-Prize" continues to recognize excellence in urology, perpetuating Alken's influence.
- His career serves as a model for academic and clinical development in the field.
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Overview
Ethers can also be prepared from alkenes through acid-catalyzed addition of alcohols and alkoxymercuration–demercuration.
Preparation of Ethers by Acid-Catalyzed Addition of Alcohol to Alkenes
The acid-catalyzed addition of alcohol to an alkene involves treating the alkene with an excess of alcohol in the presence of an acid catalyst to form an ether under suitable conditions. The hydrogen will add to the less substituted carbon so that the nucleophile can attack the more substituted...
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02:47Structure and Bonding of Alkenes
Olefins, which are unsaturated hydrocarbons containing one or more carbon–carbon double bonds, are broadly divided into alkenes and cycloalkenes. The general chemical formula of an alkene is CnH2n.
Doubly bonded carbons are sp2 hybridized and have a trigonal planar geometry. The double bond is composed of a σ bond formed by the overlap of hybrid orbitals and a π bond produced by the lateral overlap of unhybridized 2p orbitals on both the carbons. Each carbon atom is bonded to two hydrogen atoms...
Doubly bonded carbons are sp2 hybridized and have a trigonal planar geometry. The double bond is composed of a σ bond formed by the overlap of hybrid orbitals and a π bond produced by the lateral overlap of unhybridized 2p orbitals on both the carbons. Each carbon atom is bonded to two hydrogen atoms...
02:01Isomerism in Alkenes
Alkenes like 1-butene and 2-butene exhibit constitutional isomerism, as they differ in the position of the double bond. Further, 2-butene exhibits stereoisomerism and exists as two distinct compounds differing in spatial arrangement.
An isomer is called cis-2-butene when the methyl groups are on the same side of the double bond, and the other stereoisomer, in which methyl groups are on the opposite side of the double bond, is called trans-2-butene. The cis and trans stereoisomers are not...
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The radical dimerization of ketones or aldehydes gives vicinal diols through a pinacol coupling reaction. However, the behavior of titanium metals used for the reaction as a source of electrons is unusual. When the reaction is carried out in the presence of titanium, diols can be isolated at low temperatures. Else titanium further reacts with diols, forming alkenes through the McMurry reaction.
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