Scope of anti-selective Michael addition.

Entry	1	2: R2	T (d)	anti-5	Yielda (%)	drb	eec (%)
1	1a	2a: 4-ClC6H4	2.5	anti-5a	99	15 : 1	95
2	1a	2b: 3-ClC6H4	2.5	anti-5b	99	14 : 1	95
3	1a	2c: 2-FC6H4	3	anti-5c	95	8 : 1	91
4	1a	2d: Ph	5	anti-5d	90	20 : 1	96
5	1a	2e: 4-MeC6H4	5	anti-5e	91	25 : 1	95
6	1a	2f: 2-naphthyl	5	anti-5f	99	22 : 1	95
7	1a	2g: 2-thienyl	5	anti-5g	97	20 : 1	97
8d	1a	2h: (E)-PhCH CH	5	anti-5h	78	6 : 1	90
9	1b	2a: 4-ClC6H4	1.5	anti-5v	89	10 : 1	93
10	1c	2a: 4-ClC6H4	3	anti-5w	86	17 : 1	95
11	1d	2a: 4-ClC6H4	2	anti-5x	91	30 : 1	96
12	1e	2a: 4-ClC6H4	4	anti-5y	99	14 : 1	94
13e	1c	2m: CF3	3.5	anti-5q	88	11 : 1	94
14f	1d	2m: CF3	3.5	anti-5r	91	19 : 1	94
15e	1d	2n: CF2H	3	anti-5s	93	7 : 1	94

^aIsolated yield.

^bDetermined by ¹H NMR analysis of the crude mixture.

^cDetermined by HPLC analysis.

^d10 mol% 4b.

^e20 mol% 4b and 20 mol% K₂HPO₄·3H₂O.

^f10 mol% 4b and 10 mol% K₂HPO₄·3H₂O.

^g20 mol% 4b.