Table 1.
| ||||
---|---|---|---|---|
entry | Rh2L4a | solventb | equiv. EtOH | yield (%) |
1 | Rh2(S-DOSP)4 | neat | 10 | 12 |
2 | Rh2(S-DOSP)4 | hexanes | 10 | 8 |
3 | Rh2(S-DOSP)4 | TFT | 5 | 51 |
4 | Rh2(S-DOSP)4 | TFT | 10 | 61 |
5 | Rh2(Ooct)4 | TFT | 10 | 48 |
6 | Rh2(S-PTAD)4 | TFT | 10 | 38 |
7 | Rh2(OAc)4 | TFT | 10 | 50 |
In all reactions 1 mol% of catalyst was employed. The reaction was allowed to react for 4h after addition of the solution of 2.
All reactions were run at a concentration of 0.15 M with respect to 2.