Table 2. Substrate scope ^a .

Entry b , c	R product	S product	Entry b , c	R product	S product
1–5			16
6			17
7			18
8			19
9			20
10			21
11			22
12			23
13			24
14			25
15

^aGeneral conditions: 1 (0.075 mmol), 2a (0.05 mmol), and II/DNBA-I (0.01 mmol, 20 mol%) in CHCl₃ (0.25 mL) at r.t. for 24–36 h; 1 (0.075 mmol), 2b (0.05 mmol), and II/DNBA-II (0.01 mmol, 20 mol%) in CH₃OH (0.4 mL) at r.t. for 24–36 h.

^bYields shown are of isolated products.

^cThe ee was determined by GC or HPLC on a chiral stationary phase.

^dCatalyst III/TfOH was used instead of II/DNBA-II at r.t. for 36 h.