construction of highly substituted 2-pyridone scaffolds using α,β-unsaturated oximes and fluorinated diazomalonate. The reaction proceeds through direct, site-selective alkylation based on migratory insertion and subsequent cyclocondensation. A wide substrate scope with different functional groups was explored. The requirement of fluorinated diazomalonate was explored for this transformation. The developed
Allylic rearrangements of cyclo-octatetraenylmethanols
作者:R. P. Houghton、E. S. Waight
DOI:10.1039/j39690000978
日期:——
alcohols in which the hydroxy-group is allylic to one of the double bonds of a cyclo-octatetraene ring have been prepared by condensation of cyclo-octatetraenyl-lithium with benzaldehyde and acraldehyde, and by reduction of the ketone obtained from cyclo-octatetraenyl-lithium and crotononitrile. In acid solution all three alcohols undergo allylicrearrangements, but only in the case of the alcohol derived
Metal‐organic framework [Fe(BTC) (BTC=1,3,5‐benzenetricarboxylic acid)] is a convenient heterogeneous catalyst for the carbon‐carbon bond forming reaction in toluene between acetophenone and benzaldehyde to give selectively chalcone in high yield. Fe(BTC) appears as a general catalyst able to synthesize selectively different chalcone derivatives bearing various functionalities. Fe(BTC) could be recycled
Divergent reactivities in fluoronation of allylic alcohols: synthesis of Z-fluoroalkenes via carbon–carbon bond cleavage
作者:Tang-Lin Liu、Ji’En Wu、Yu Zhao
DOI:10.1039/c7sc00483d
日期:——
the use of N-fluorobenzenesulfonimide (NFSI) under catalyst-free conditions. By using this simple procedure, a wide range of functionalized Z-fluoroalkenes can be accessed in highyield and selectivity from cyclic and acyclic allylic alcohols.
Simple Access to α, β Unsaturated Ketones by Acid-Catalyzed Solvent-Free Reactions
作者:Erwan Le Gall、Françoise Texier-Boullet、Jack Hamelin
DOI:10.1080/00397919908086000
日期:1999.10
Abstract Various chalcones and dibenzylidene cycloalkanones were readily prepared in a few minutes with good yields by simply mixing aromatic aldehydes with substituted acetophenones or benzaldehyde with cycloalkanones in the presence of catalytic amounts of p-toluene sulfonic acid under focused microwave irradiation.