beckmann rearrangementの例文

• A similar migration is found in the Beckmann rearrangement.
• This reaction is now known as the Beckmann rearrangement.
• Pure cyclododecanone can then be converted into cyclododecanone oxime, which yields laurolactam after Beckmann rearrangement.
• Aliphatic ketones provide under similar conditions in very high yields oximes, arylalkyl ketones react in a Beckmann rearrangement to amides.
• The Beckmann rearrangement is another example of a ring expanding reaction in which a heteroatom is inserted into a carbon-carbon bond.
• Afterwards he was allowed to use a laboratory at the institute, and he worked again on the Beckmann rearrangement and measurements of physical properties of solutions.
• The use of " N "-hydroxyphthalimide as a catalyst in the oxidation of KA oil avoids the formation of the undesirable by-product ammonium sulfate which is produced by the conventional ?-caprolactam synthesis ( Beckmann rearrangement of cyclohexanone oxime with sulfuric acid ).
• This expansion is useful because it allows the expansion of a beta-ketoester to a large cyclic ketone which can easily be elaborated using either the cyclic ketone or the exocyclic ester . The bond migration steps in the Baeyer-Villiger oxidation ( A ) and the Beckmann rearrangement ( B ).
• A Beckmann rearrangement ( methanol, sodium polystyrene sulfonate 2 hrs, 170 癈 ) took place next to lactam "'32 "'( not isolated ) which reacted further to the tetracycle "'33 "'called "'alpha-corrnorsterone "'in an amine-carbonyl condensation-aldol condensation cascade.