Table 1.

Comparative selectivities obtained with catalysts 5 and ent-5.

			Cat. 5	Cat. ent- 5
Entry	Compound	R	Ratio 3 : 4	Ratio 3 : 4
1	3	Me	1 : 4.5	1 : 7
2	6	Et	1 : 3.5	1 : >10
3	7		1 : 5	1 : 8
4	8		1 : >10	1 : >10
5	9		1 : 9	1 : >10