Table.

Stereoselectivities of reactions of arylcuprates with trans and cis α,β-enoates with a single γ-alkoxy stereocenter

enoate	adduct	% yield	anti:syn
trans enoates
1	12a	80	> 50:1
1	12b	78	> 50:1
1	12c	79	> 50:1
1	12d	75	> 50:1
1	12e	76	> 50:1
1	12f	75	> 50:1
2	13a	88	> 50:1
2	13d	93	> 50:1
2	13f	82	> 50:1
3	14a	94	14.6:1
3	14d	76	11.3:1
3	14f	88	9.9:1
4	15a	89	5.4:1
4	15d	80	6.1:1
4	15f	82	5.9:1
cis enoates
5	16a	87	1.6:1
5	16d	69	1:1.3
5	16f	53	1:1.3
6	17a	72	2.8:1
6	17d	68	2.7:1
6	17f	63	2.9:1
7	18a	65	3.4:1
7	18d	56	1.9:1
7	18f	54	2.2:1