Palladium(II)-Catalyzed ortho-Olefination of Arenes Applying Sulfoxides as Remote Directing Groups
摘要:
A novel palladium-catalyzed ortho-C(sp(2))-H olefination protocol has been developed by the use of sulfoxide as the directing group. Importantly, relatively remote coordination can be accessed to achieve the ortho olefination of benzyl, 2-arylethyl, and 3-arylpropenyl sulfoxide substrates, and the olefinated sulfoxide can be easily transformed to other functionalities.
A KOH-promoted unusual deoxidative coupling reaction of β-sulfinyl esters with benzylic trimethylammonium salts to produce thioethers is discovered for the first time. If quaternary ammonium salts synthesized from enantiomerically enriched amines are adopted, highlyenantiomerically enriched benzyl thioethers (>95–99% ee) with configurations opposite to those of the enantiomerically enriched amines