In the reactions with enolate anions, organoselenium moieties of aryl vinyl selenoxides and selenones have exhibited two important roles, e.g., activation of C=C bonds for conjugate addition reaction and behaviors as excellent leaving groups. Owing to such characteristic features, ketone enolates react with p-chlorophenyl vinyl selenoxide to afford the corresponding cyclopropyl ketones through an initial
N-alkenoxypyridinium salts are widely used for the synthesis of α-functionalized ketones via umpolung strategy, such approaches are usually limited to special nucleophiles at high temperatures. Herein, we developed an alternative photoinduced N-heterocyclic carbene (NHC)- mediated functionalization of N-alkenoxypyridinium salts with various nucleophiles, including tetramethylammonium azide, secondary amines, aryl
A NOVEL METHOD FOR THE PREPARATION OF PHENYLTHIOMETHYL KETONES
作者:Isao Kuwajima、Yukiko Kurata
DOI:10.1246/cl.1972.291
日期:1972.4.5
It has been found that the reaction of bis (phenylthlio)methyllithium with various aldehydes, followed by treatment with methyllithium leads to the formation of the corresponding phenylthiomethyl ketones, accompanied with liberation of phenylthiolate anion, in high yields.