Table 2.

Substrate scope of aldimine esters^a.

^aAll reactions were carried out with 0.30 mmol of 1, 0.20 mmol of 2a in 2 mL of CH₂Cl₂ at room temperature for 6–10 h

^bYields refer to the isolated products after chromatographic purification

^cThe dr value was determined by the crude ¹H NMR

^dThe ee value was determined by HPLC analysis

^eCs₂CO₃ was used as the base

^ftert-Butyl aldimine ester was used