Chemoselective Deprotection of Sulfonamides Under Acidic Conditions: Scope, Sulfonyl Group Migration, and Synthetic Applications
作者:Tomas Javorskis、Edvinas Orentas
DOI:10.1021/acs.joc.7b02507
日期:2017.12.15
Chemoselective acidic hydrolysis of sulfonamides with trifluoromethanesulfonic acid has been evaluated as a deprotection method and further extended to more complex synthetic applications. In contrast to conventional troublesome sulfonamide hydrolysis, a near-stoichiometric amount of acid was found to be sufficient to bring about efficient deprotection of various neutral or electron-deficient N-arylsulfonamides
Ligand-Free Palladium(II)-Catalyzed <i>ortho</i>
-C-H Chalcogenations of <i>N</i>
-Arylsulfonamide via Weak Coordination
作者:Linghui Gu、Xinyue Fang、Zhengyun Weng、Yupin Song、Wenbo Ma
DOI:10.1002/ejoc.201900050
日期:2019.2.28
The first palladium(II)‐catalyzed direct ortho‐C(sp2)–H chalcogenations of N‐arylsulfonamide via weak coordination have been achieved. This strategy features ligand/additive‐free conditions, broad substrate scope with excellent functional group tolerance and a high position selectivity.
The present invention concerns a compound of formula (I)
or a salt, suitably a pharmaceutically acceptable salt, or solvate thereof, wherein the groups R
1
, R
2
, Ar′, A and B are defined in the description, to compositions and use of the compounds in the treatment of diseases ameloriated by inhibition of phosphatidylinositol 3-kinase.