Catalytic amounts of ytterbium trifluoromethethanesulfonate [Yb(OTf)3] have been used to catalyse the acetylation reactions of amines with ethyl acetate under mild and neutral conditions. ... Catalytic amounts of ytterbium trifluoromethethanesulfonate [Yb(OTf)3] have been used to catalyse the
[Leeson, Paul D.; Baker, Raymond; Carling, Robert W.; Curtis, Neil R.; Moore, Kevin W.; et al. Journal of Medicinal Chemistry, 1991 , vol. 34, # 4 p. 1243 - 1252]