Table 2. Gold(I)-Catalyzed Hydroamination of Ethylene by Imidazolidine-2-one^a.

entry	catalyst	PC2H4 (bar)	conversion (%)b	10:11
1	1	4	>99	100:0
2	1·MeCNc	4	>99	100:0
3	2	4	0	-
4	3	4	>99	100:0
5	4	4	<5	n.d.d
6	5	4	<5	n.d.d
7	6	4	95	100:0
8	7	4	20	15:85
9	8	4	>99	100:0
10	[(Ph3P)AuCl]	4	0
11		4	0
12	L1	4	0
13	L3	4	0
14	1	2	>99	100:0
15	1·MeCNc	2	98	100:0
16	3	2	>99	100:0
17	6	2	50	35:65
18	8	2	56	n.d.d
19	1	1	98	100:0
20	1·MeCNc	1	50	35:65
21	3	1	95	100:0
22	6	1	11	10:90
23	8	1	30	35:65
24	1e	1	64	30:70
25	3e	1	50	20:80
26	1·C2H4	1	>99	100:0
27	1f	1	>99	100:0
28	1g	1	96	66:33
29	3f	1	70	31:69
30	3g	1	64	37:63
29	13	1	>99	100:0

^aReaction was performed with imidazolidine-2-one (0.20 mmol) under the indicated ethylene pressure, gold catalyst (0.01 mmol), and AgSbF₆ (0.01 mmol) as a chloride abstractor in 1,4-dioxane (1 mL) at 100 °C for 18 h.

^bConversion was determined by ¹H NMR spectroscopy with anisole as the internal standard.

^cIn the absence of AgSbF₆.

^dNot determined (n.d).

^eCatalyst loading at 2 mol %.

^fReaction at 80 °C.

^gReaction at 60 °C.