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
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.
The present invention comprises a new class of compounds capable of modulating the activity of PI3 kinase and, accordingly, useful for treatment of PI3 kinase mediated diseases, including melanomas, carcinomas and other cancer-related conditions. The compounds have a general Formula I
wherein each of A
1
, A
2
, A
3
, A
4
, X, R
1
and R
2
are defined herein. The invention further comprises pharmaceutical compositions, methods for treatment of PI3 kinase mediated diseases, and intermediates and processes useful for the preparation of compounds of the invention.