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Reaction conditions: 3-methoxyphenylmagnesium bromide (0.75 mmol, 2.5 equiv), imine (0.3 mmol, 1.0 equiv), toluene (2.5 mL, dry), N2-atmosphere −78 °C to r.t. Compound 17 (0.09 mmol, 1 equiv), anisole (20 equiv), TfOH (9 equiv), CH2Cl2, 0 °C to r.t.
