*3.10. General Procedure for the Ring-Opening of Aryl-Aziridine 14 with β-Keto Ester 9*

To a mixture of β-keto ester **9** (0.1 mmol, 24.4 mg, ω = 95%), catalyst **IV**, **VIII**, or **IX** (5 mol%), and K3PO4 (2 equivalents, 42 mg) in toluene (2.5 mL) under argon atmosphere, 2-phenyl-1-tosylaziridine (**14**) (2 equivalent, 54.6 mg) was added and stirred at room temperature for 24 h. After 24 h at 25 ◦C, the reaction mixture was filtrated through a plug of anhydrous Na2SO4 and washed with dichloromethane.
