Table 1.
Entry | Catalyst | Solvent | Yield [%][b] |
---|---|---|---|
1 | [CoII(P1)] | PhMe | 57 |
2 | [CoII(P1)] | THF | 25 |
3 | [CoII(P1)] | dioxane | 50 |
4 | [CoII(P1)] | DCE | 10–15 |
5 | [CoII(P1)] | MeCN | <5 |
6 | [CoII(P1)] | DMF | – |
7 | [CoII(P1)] | PhCl | 55 |
8 | [CoII(P1)] | PhMe/K3PO4 | 69 |
9 | [CoII(P1)] | PhMe/K2CO3 | 65 |
10 | [CoII(P1)] | PhMe/KHCO3 | 58 |
11 | [CoII(P1)] | PhMe/NEt3 | 63 |
12 | [CoII(P2)] | PhMe/K3PO4 | 70 |
13 | [CoII(P3)] | PhMe/K3PO4 | 72 |
14 | [CoII(P4)] | PhMe/K3PO4 | 35 |
Stoichiometry EDA:aniline = 1:2.
Isolated yields after column chromatography.