Table 3.

Diastereoselective reaction by using chiral oxazolyl ferrocene 1b.

entry	R	time (h)	product	yield (%)
1	Ph	2	3a	43
2	4-MeOC6H4	2	3b	24
3	4-ClC6H4	2	3c	38
4	benzyl	2	3d	32
5	n-butyl	24	3e	69
6	cyclohexyl	24	3f	38