Linear-Selective Rhodium(I)-Catalyzed Addition of Arylboronic Acids to Allyl Sulfones
作者:Gavin C. Tsui、Mark Lautens
DOI:10.1002/anie.201004345
日期:2010.11.15
One step further: The rhodium(I)‐catalyzed addition of readily available arylboronic acids to allyl sulfones affords the linear (formal) hydroarylated products in good yields and excellent regioselectivities. The reaction broadens the scope of unactivated alkenes that can participate in rhodium‐catalyzed addition reactions.
(E)-2-Iodo-1-tosyl-1-alkenes readily available by iodosulfonization of 1-alkynes were found to be useful synthons for the regio- and/or stereoselective preparation of 1-tosyl-1-alkynes, 1-tosyl-2-alkynes, (Z)-vinyl and (Z)-allyl sulfones, β-tosyl enamines, α-tosyl ketones, α-tosyl aldehyde acetal, and β-disubstituted vinyl sulfones.
Several (E)- and (Z)-1-p-toluenesulfonyl(=tosyl)-2-alkenes, allylsulfones, were regio- and stereoselectively prepared from aldehydes and alkynes, respectively, in good yields by application of the results of our previous investigation on “syn-effect” and iodosulfonization.