Table 3.

Strecker reaction of acetophenone and aniline catalyzed by various metal triflates

Entry	Catalyst	Yield, %*
1	Ga(OTf)3	98
2	Yb(OTf)3	92
3	Y(OTf)3	85
4	Sc(OTf)3	89
5	Sm(OTf)3	90
6	La(OTf)3	75
7	Cu(OTf)2	80
8	Nd(OTf)3	75†

Time, 5 h; Amount of catalyst, 5 mol%.

*Isolated yield.

^†Determined by NMR analysis.