Table 1. Screening of Representative Catalyst Systems^a.

entry	ligand (L)	2	3	4b
1	none	3	85	12
2	TMEDA (1.1 equiv)	83	8	9
3	TMEDA (0.1 equiv)	11	76	13
4	PPh3	16	82	2
5	P(o-Tol)3	10	90	0
6	DPEPhos	65	25	10
7	DPEPhos/TMEDA	90	8	2
8	1,2-di-PPh2-C6H4	0	79	21
9	1,2-di-PPh2-C6H4/TMEDA	50	50	0
10	dtbpf	91	7	2
11	dtbpf/TMEDA	94	6	0

^aConditions: 0.3 mmol of alkenyl halide substrate (0.25 M in THF). Palladium catalyst (2 mol %), Grignard reagent (1.75 equiv), TMEDA (1.85 equiv).

^bGC ratio.