Table 1.

Reaction Condition Deoptimization

Entrya	Variation from the standard conditions	Yield 4ab
1	None	97%c
2	No [Cp*Rh(MeCN)3](SbF6)2	0%
3	[Cp*RhCl2]2 (5%) / AgSbF6 (20%)	91%
4	[Cp*IrCl2]2 (5%) / AgSbF6 (20%)	0%
5	[Cp*Co(CO)I2] (10%) / AgSbF6 (20%)	0%
6	[RuCl2(p-cymene)]2 (5%) / AgSbF6 (20%)	0%
7	No NaOAc	87%
8	Cp*Rh(OAc)2 (10%)d	0%
9	Cp*Rh(OAc)2 (10%) / AgSbF6 (20%)d	86%
10	DCE as solvent	77%
11	0.5 M	91%
12	50 °C	85%
13	2:3:1 ratio 1a:2a:3a	63%

^aConditions: 0.10 mmol of 1a, 0.30 mmol of 2a, 0.20 mmol of 3a

^bYields determined by ¹H NMR relative to trimethylphenylsilane as an external standard.

^cIsolated yield of the pure material was 86%.

^dNo NaOAc was added.