Table 1.

Asymmetric Allylboration of Acyl Imines^a

entry	catalyst	mol%b	% yieldc	erd
1	-	-	<5	-
2	7a	15	<5	50:50
3	7b	15	<5	55:45
4	7c	15	10	60:40
5	7d	15	51	50:50
6	7e	15	76	68:32
7	7f	15	81	93:7
8	7g	10	60	96.5:3.5
9	7h	15	85	96:4
10	7h	10	80	95:5
11	7h	5	60	90:10
12	7i	15	21	55:45

^aReactions were run with 0.125 mmol borane, 0.125 mmol acyl imine, 15 mol % catalyst and in toluene (0.1 M) for 16 h under Ar, followed by flash chromatography on silica gel.

^bCatalyst concentration used relative to imine.

^cIsolated yield.

^dEnantiomeric ratios determined by chiral HPLC analysis.