Synthesis of 2,4-disubstituted furans and 4,6-diaryl-substituted 2,3-benzo-1,3a,6a-triazapentalenes
作者:Alan R. Katritzky、Deniz Hur、Kostyantyn Kirichenko、Yu Ji、Peter J. Steel
DOI:10.3998/ark.5550190.0005.208
日期:——
intermediates 3a-h. The treatment of 3a-h with trimethylsulfonium iodide in the presence of base give intermediate oxiranes 4a-h and 2,3-benzo-1,3a,6a-triazapentalenes 7d-g depending on substituent. Acid-catalyzed rearrangement of crude 4a-h give 2,4-disubstitutedfurans 5a-h.
Access to Polysubstituted Furan Derivatives via Cascade Oxy-palladation and Hydrocarbofunctionalization of Unactivated Alkenes
作者:Shivam Pandey、Rahul K. Shukla、Chandra M. R. Volla
DOI:10.1021/acs.orglett.3c01571
日期:2023.6.30
the synthesis of biologically relevant multisubstituted furans is a much-desired yet challenging task. Herein, we report an efficient and versatile strategy involving two different pathways for the construction of diverse polysubstituted C3- and C2-substituted γ-furanyl carboxylic acid derivatives. The synthetic approach for C3-substituted furans involves intramolecular cascade oxy-palladation of alkyne-diols
Extended Version of the Corey–Chaykovsky Reaction: Synthesis of 2,4-Substituted Furans by the Treatment of β-Dialkylamino Chalcones with Dimethylsulfonium Methylide
作者:Roman O. Shcherbakov、Danil A. Myasnikov、Igor V. Trushkov、Maxim G. Uchuskin
DOI:10.1021/acs.joc.3c00203
日期:2023.7.7
We describe the synthesis of functionalized furans using the concept of the extended Corey–Chaykovsky reaction. Namely, β,β-disubstituted α,β-unsaturated ketones were treated with dimethylsulfonium methylide to give vinyloxiranes, which immediately rearranged into the corresponding furans. The developed approach allows for synthesizing a broad range of unsymmetrically di- and trisubstituted furans