Influence of Mo(CO)₆ on the aziridine ring opening^a.

Entry	Cu(BF4)2·H2O	Mo(CO)6	Yieldb [%]
1	+	+	23
2	+	−	23
3	−	+	—
4	−	−	—

^aConditions: aziridine (0.2 mmol), Cu(BF₄)₂·H₂O (0.1 eq.); neocuproine (0.1 eq.); Ph-I N-SO₂-o-NO₂-Ph (0.5 eq.); MeOH (10 eq.); Mo(CO)₆ (0.25 eq.); MeNO₂ (0.6 mL).

^bYields were determined by ¹H NMR using 1,3,5-trimethoxybenzene as internal standard.