The formation of carbon–halogen bonds in an enantioselective manner is an important reaction because it leads to optically active halogen compounds, which are useful intermediates for further elaboration to other valuable compounds. Within the past few years various enantioselective α-halogenations of ...
which shows an example of cyclohexanone reacting with Cl2with an acid (or base) catalyst. Right under that, is another example of (2S)-2-methyl-1-phenylbutan-1-one undergoing the same reaction. The webpage reads, "If the alpha-carbon is a chiral center, as in the second example...
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m 24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m 25. Condensation Chemistry2h 9m 26. Amines1h 43m 27. Heterocycles2h 0m 28. Carbohydrates5h 53m 29. Amino Acids3h 20m 30. Peptides and Proteins2h 42...
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m 31. Catalysis in Organic Reactions1h 30m 33. The Organic Chemistry of Metabolic Pathways2h 52m 34. Nucleic Acids1h 32m Intro to Nucleic Acids 4m Nitrogenous Bases 22m Naming Nucleosides and Nucleotides ...
Halogenated and/or sulphohalogenated polymers of an olefine having in the molecule at least six but not more than eighteen carbon are made by polymerizing one or more such olefines in the presence of a catalyst comprising (a) a compound ... BEYNON JOHN H.,MILNE CHARLES B. 被引量: 5发...
A better reformulation of Markovnikov’s rule is therefore that addition of HX to alkenes will proceed through the most stable carbocation, which is generally the more substituted carbon of the alkene. (Note that H-Br with peroxides (RO-OR) operates through a different reaction mechanism – see...
2. Reactions On The Alpha Carbon: Epimerization Let’s set the stage with a reaction that doesn’t really seem to accomplish all that much. If you take a solution of an enantiomerically pure, optically active ketone like this one [(S)-2-methylcyclohexanone] add a few drops of strong acid...
- 《Journal of the American Chemical Society》 被引量: 470发表: 1985年 Lewis Acid Catalyzed Halogenation of Activated Carbon Atoms A practical and efficient method for halogenation of activated carbon atoms using readily available N-haloimides and a Lewis acid catalyst has been disclosed. This ...
Natural and synthetic organohalogens are used in a variety of applications, and with an increasing emphasis on sustainable methods of production, enzymes that can form carbon-halogen bonds are an attractive alternative to classical synthetic approaches. Since the discovery of FADH2-dependent halogenases...
ChemInform Abstract: ABSORPTION AND CIRCULAR DICHROISM SPECTRA OF ETHYLENIC CHROMOPHORES, TRANS-CYCLOOCTENE, ALPHA- AND BETA-PINENE Aus dem Cyclohexendicarbonsureanhydrid (I) entsteht ein Diol (II), das zum Dimethylencyclohexan (III) führt. M.,G.,MASON,... - 《Chemischer Informationsdienst》 被...