Bismuth triflate catalyzes the Mannich-typereaction of a variety of in situ generated aldimines using aldehydes, anilines, and silyl enol ethers in a three-componentreaction. The reaction proceeds rapidly and affords the corresponding protected β-amino ketones in high yields (up to 94%).
An efficient and mild bismuth triflate-catalysed three-component Mannich-type reaction
作者:Thierry Ollevier、Etienne Nadeau
DOI:10.1039/b710794c
日期:——
In the presence of a catalytic amount of Bi(OTf)(3).4H(2)O, aldehydes together with amines react with silylenolates to afford the corresponding Mannich-type adducts smoothly. A wide variety of silylenolates derived from ketones, as well as esters and thioesters, react rapidly to afford the beta-amino ketones or the beta-amino esters in high yields (up to 94%).