Palladium-Catalyzed Hiyama Cross-Couplings of Arylsilanes with 3-Iodoazetidine: Synthesis of 3-Arylazetidines
摘要:
The first palladium-catalyzed Hiyama cross-coupling reactions of arylsilanes with 3-iodoazetidine were described. The protocol provides a convenient access to a variety of useful 3-arylazetidines which are of great interest in pharmaceutical laboratories in moderate to good yields (30%-88%). In addition, this strategy has the advantage of easy operation and mild reaction conditions.
Nickel-Catalyzed Monofluoroalkylation of Arylsilanes via Hiyama Cross-Coupling
作者:Yun Wu、Hao-Ran Zhang、Yi-Xuan Cao、Quan Lan、Xi-Sheng Wang
DOI:10.1021/acs.orglett.6b02803
日期:2016.11.4
first example of nickel-catalyzed monofluoroalkylation of arylsilanes has been developed with readily available fluoroalkyl halides. This novel transformation has demonstrated high reactivity, broad substrate scope, excellent functional group tolerance, and mild reaction conditions. The selective activation of a relatively inert C–Si bond for slow release of aryl carbanion is the key reason for reducing
A palladium-catalyzed domino Heck cyclization/Hiyama cross-coupling has been achieved for the synthesis of (hetero)aryl-functionalized azaindoline derivatives bearing all-carbon quaternary centers in 46–85% yields. The synthetic versatility of this protocol has been highlighted by the gram-scale synthesis and modification of aryl-containing complex bioactive molecules.
The general and efficient silylation of aryl halides has been developed utilizing triethoxysilane and a rhodium catalyst, The substrate scope is broad and includes ortho-, meta-, and para-substituted electron-rich and -deficient aryl iodides. In addition, the silylation of aryl bromides and fluoroalkanesulfonates proceeded in the presence of tetra-n-butylammonium iodide. (C) 2007 Elsevier Ltd. All rights reserved.