Construction of Benzosultam‐Containing Fused‐ and Linked‐Biheterocycles by a Cascade Double Nucleophilic Cyclization
摘要:
AbstractAlthough nucleophilic aromatic substitution (SNAr) and many nucleophilic epoxide ring‐opening reactions proceed under similar anionic conditions, the literature examples of using these reactions in tandem for the construction of heterocyclic compounds are scarce. In this article, we disclose a detailed account of the synthesis of benzothiaoxazepine‐1,1‐dioxide‐containing fused‐ and linked‐biheterocycles by a base‐mediated, exo‐selective intramolecular epoxide‐opening/intramolecular nucleophilic aromatic substitution cascade of epoxide‐tethered ortho‐fluorobenzenesulfonamides. A wide range of substrates exhibited high overall yields and complete regio‐ and diastereoselectivity
A novel photochemical approach for the synthesis of phenanthrene derivatives fromlinear 3-aryl-N-(arylsulfonyl) propiolamides via a tandem radical Smiles rearrangement/C–S bonding/Mallory reaction is disclosed. The control experiment results and isolation of the key intermediates give further insight into the reaction mechanism. Gram scale reaction using a flow reactor demonstrated the synthetic potential
N-Methylation of Amines with Methanol in Aqueous Solution Catalyzed by a Water-Soluble Metal–Ligand Bifunctional Dinuclear Iridium Catalyst
作者:Chong Meng、Peng Liu、Nguyen Thanh Tung、Xingyou Han、Feng Li
DOI:10.1021/acs.joc.9b03411
日期:2020.5.1
The N-methylation of amines with methanol in aqueous solution was proposed and accomplished by using a water-soluble metal-ligand bifunctional dinuclear iridium catalyst. In the presence of [(Cp*IrCl)2(thbpym)][Cl]2 (1 mol %), a range of desirable products were obtained in high yields under environmentally benign conditions. Notably, this research exhibited the potential of transition metal-catalyzed
Disclosed is a dihydropyrimido fused ring derivative as a HBV inhibitor, and in particular relates to a compound shown as formula (I) or a pharmaceutically acceptable salt thereof.
Conjugate Addition - SNAr Domino Reaction for the Synthesis of Benzo- or Pyridyl-Fused Lactams and Sultams
作者:Karsten Juhl、Niels Nørager
DOI:10.1055/s-0030-1258302
日期:2010.12
A versatile domino reaction that can be used for the synthesis of bicyclic benzo- or pyridyl-fused lactam and sultam derivatives is presented, enabling rapid synthesis of a variety of complex structures.