*3.11. General Procedure for the Michael Addition of Glycine Schiff Base 16 with Methyl Acrylate (17)*

Degassed solvent (2.5 mL) was added to a mixture of*tert*-butyl 2-((diphenylmethylene)amino) acetate (**16**) (0.05 mmol, 14.8 mg), catalyst **I**, **III**–**V**, **VII**, **VIII**, or **IX** (10 mol%), and Cs2CO3 (1.5–10.0 equivalents) in a Schlenk tube at 25 ◦C or 0 ◦C; then, methyl acrylate (**17**) (1.5 equivalents, 6.8 μL) was added. After 24 h at 25 ◦C or 0 ◦C, the reaction mixture was filtrated through a plug of anhydrous Na2SO4 and washed with ethyl acetate. The volatiles were evaporated in vacuo. The crude product **18** was purified by column chromatography (Silica gel 60, EtOAc/Heptane = 1:15). Enantiomeric excess (ee) was determined by HPLC (Chiralpak AD-H, *n*-Hexane/*i*-PrOH = 95:5, flow rate 0.5 mL/min, λ = 250 nm, 10 ◦C) after filtration of the reaction mixture through a plug of Na2SO4.
