The synthesis of thioethers starting from alcohols and thiols in the presence of amorphous solid acid catalysts is reported. A silica alumina catalyst with a very low content in alumina gave excellent results in terms of both activity and selectivity also under solvent-free conditions. The reaction rate follows the electron density of the carbinol atom in the substrate alcohol and yields up to 99%
Visible-Light-Driven Photocatalytic Initiation of Radical Thiol–Ene Reactions Using Bismuth Oxide
作者:Olugbeminiyi O. Fadeyi、James J. Mousseau、Yiqing Feng、Christophe Allais、Philippe Nuhant、Ming Z. Chen、Betsy Pierce、Ralph Robinson
DOI:10.1021/acs.orglett.5b03184
日期:2015.12.4
A nontoxic and inexpensive photocatalytic initiation of anti-Markovnikov hydrothiolation of olefins using visible light is reported. This method is characterized by low catalyst loading, thereby enabling a mild and selective method for radical initiation in thiol-ene reactions between a wide scope of olefins and thiols.