Table 2. Mannich Reactions of β-Ketophosphates 7 with Imines 8 To Afford 9 Catalyzed by the Catalyst System Containing 1a^a.

^aConditions: 7 (0.75 mmol), 8 (0.25 mmol), 1a·CF₃COOH (0.075 mmol), and dibenzyl phosphate (0.075 mmol) in toluene (1.65 mL) at rt (25 °C). Isolated yield and enantiomer ratio (er) after purification are shown. ¹H NMR yield before purification is shown in parenthesis.

^bA 1.0 mmol-scale reaction.

^cDetermined after derivatization (see the Supporting Information).