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
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.
Construction of Benzosultam‐Containing Fused‐ and Linked‐Biheterocycles by a Cascade Double Nucleophilic Cyclization
作者:Jonali Das、Biraj Jyoti Borah、Sajal Kumar Das
DOI:10.1002/ejoc.202101421
日期:2022.3.15
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