Table 4.

Evaluation of Xantphos Ligands in the Hydroamination of 1a.^a

entry	% Rh	ligand	time (h)	%convb	ratiob2a:3a:4a:5a
1	1	L1	2	100	18:1:1:0.7
2	1	L1’	2	100	11:1:1:0.2
3	3	L2	2	83	1:0.1:0:4.4
4	3	L2’	2	62	1:0.2:0:9.1
5	3	L3	2	47	2:1:1:0c
6	3	L4	2	100	5.7:1:1:0.4

^aReaction conditions: 0.2-0.3 mmol 1a, 1-3 mol % [Rh(CH₃CN)₂COD]BF₄, and 1.2-3.5 mol % ligand in 0.4-0.6 mL of tBuOH at 70 °C.

^bDetermined by ¹H NMR spectroscopy.

^cTrace amount of isomerization observed.