Table 1. Optimization of reaction parameters ^a .

Entry	Ligand	Temp (°C)	% Yield b	% ee c
1	L1	0	53	75
2	L2	0	76	78
3	L3	0	93	79
4	L4	0	82	82
5 d	L4	0	62	81
6	L4	23	86	74
7	L4	–10	69	84
8 e	L4	–10	80	85
9	—	0	0	—

^aConditions: 1a (0.1 mmol), 2a (0.1 mmol), Ni(COD)₂ (10 mol%), ligand (12 mol%) in Et₂O (1.0 mL).

^bYields determined by ¹H NMR of crude reaction mixture using 1,3,5-trimethoxybenzene as a standard.

^cDetermined by chiral SFC analysis of the isolated product.

^dNi(COD)₂ (5 mol%) and L4 (6 mol%) were used.

^eReaction time = 48 h.