Table 2. Asymmetric epoxidation of different α-methylstyrene derivatives with (S,S′)^Me2N1Fe, H₂O₂ and peptide 7 ^a .

Entry	Substrate	Conv. (yield) (%)	(ee)%
1		94(80)	66
2		99(81)	64
3		75 b	68
4		80 b	92

^aUnless stated, reaction conditions are 2 mol% of (S,S′)^Me2N1Fe, H₂O₂ (2.3 equiv.) and peptide 7 (4 mol%) in CH₃CN at –30 °C for 30 min.

^bIsolated yields. ee’s determined using chiral GC and HPLC.