Aldehyde bis-arylation by metal triflates including bismuth triflate powder

Development of an efficient catalytic reaction promoted by a metal triflate has been emphasized in contemporary synthesis. To evaluate the potential o f some metal trflates such as bismuth triflate in our process research, we devised here an expedient protocol for its preparation and characterization . Comparison of its catalytic activity with other well-known metal triflate s such as scandium triflate and copper triflate was made in a glyoxylate ar ylation reaction, which is a useful transformation for the construction of a 1,1-diarylethane skeleton, Furthermore, NMR analysis of Bi(OTf)(3) in ace tone-d(6) revealed the unique nature and reactivity of the triflate, which has not heretofore been disclosed.