. Author manuscript; available in PMC: 2014 Sep 9.

Published in final edited form as: Tetrahedron. 2013 May 23;69(36):7618–7626. doi: 10.1016/j.tet.2013.05.011

Table 4.

Screening with one equivalent of catalyst.


entry	catalyst	Ar	X	Y	ee (%)
1	46	2,4,6-triisopropylphenyl	O	O	26
2	47	2,4,6-triisopropylphenyl	S	O	4
3	48	3,5-ditrifluoromethylphenyl	O	O	4
4	49	2,4,6-triisopropylphenyl	O	NTf	62
5	50	2,4,6-triisopropylphenyl	S	NTf	13
6	51	2,6-diisopropyl-4-(9-anthracenyl)phenyl	O	NTf	31