Table 2. Enantioselective α-Trifluoromethylation: Aldehyde Scope.

entry	producta	yield,b eec	entry	producta	yield,b eec
1		79% yield 99% ee	7		73% yieldd 90% ee
2		72% yield 95% ee	8		61% yield 93% ee
3		86% yield 97% ee	9		75% yield 97% ee
4		78% yield 98% ee	10		68% yield >20:1 dr 99% ee
5		X = CH2 70% yield 99% ee	11		62% yield >20:1 dr 99% ee
6		X = NBoc 70% yield 98% ee

^aStereochemistry assigned by chemical correlation or by analogy.

^bIsolated yields of the corresponding alcohol.

^cEnantiomeric excess determined by chiral SFC or HPLC analysis.

^dUsing catalyst 11; ref 20.