Table 3. Competitive Experiments for the Ru(0)-Catalyzed Reaction^a.

entry	reactant 4	R	X	Y	product 5	convb (%)	yield (%)
1	4e	Me	OiPr	H	5af	35	25
2	4f	Me	OMe	H	5k	58	32
3	4g	Me	Me	H	5i	99	76
4	4a	Me	H	H	5a	86	64
5	4h	Me	F	H	5l	73	44
6	4i	Me	CF3	H	5n	24	15
7	4j	Mec	CO2Me	H	5ag	43	26
8	4g	Me	Me	Cl	5ah	69	50
9	4g	Me	Me	CF3	5ai	48	33
10	4k	CF3	Me	H	5t	95	80
11	4m	Phc	Me	H	5x	98	90
12	4m	Phc	Me	Me	5aj	88	73
13	4m	Phc	Me	t-Bu	5ak	76	67
14	4m	Phc	Me	F	5al	71	60
15	4m	Phc	Me	CF3	5am	47	33

^aReaction conditions: 4 (0.5 mmol), 6 (0.75 mmol), Ru₃(CO)₁₂ (5 mol %), and pinacolone (0.5 mL).

^bConversion based on GC analysis with respect to 4 (dodecane as internal standard).

^c150 °C.