Table 3.

Substrate Scope

entry	R	R'	substrate	product	yield (%)a	ee(%)b	drc
1	Et	Me	13	14	25	89	7:1
2		Et	26	11	90	26	12:1
3		Pr	15	16	81	90	6:1
4		Bu	17	18	71	92	12:1
5d		Bu	19	20	44	87	11:1
6		CH2CH2Ph	21	22	65	31	19:1
7		CH2CH2OBn	23	24	87	98	11:1
8		CH2CH2CH2CI	25	26	83	81	10:1
9			27	28	83	90	14:1
10			29	30	78	92	4:1
11			31	32	77	86	9:1
12	Pr	Et	33	34	92	92	11:1
13			35	36	64	94	5:1
14		Et	37	38	94	90	9:1

^aAll reactions conducted with 1 equiv of 7 and 2 equiv of Michael acceptor at 0 °C.

^bSee Table 1.

^cSee Table 1.

^dReaction time = 20 h.