Table 1.
| |||||
|---|---|---|---|---|---|
| Pd source | L | Pd/L (mol %) | base | assay yield (%) | |
| 1 | Pd(OAc)2 | L1 | 10/15 | LiN(SiMe3)2 | 78 |
| 2 | Pd(OAc)2 | L2 | 10/15 | LiN(SiMe3)2 | 60 |
| 3 | Pd(OAc)2 | L3 | 10/15 | LiN(SiMe3)2 | 59 |
| 4 | Pd(OAc)2 | L4 | 10/15 | LiN(SiMe3)2 | 49 |
| 5 | Pd(OAc)2 | L1 | 2.5/3.75 | LiN(SiMe3)2 | 75 |
| 6 | [PdCl(allyl)]2 | L1 | 2.5/3.75 | LiN(SiMe3)2 | 74 |
| 7 | Pd(dba)2 | L1 | 2.5/3.75 | LiN(SiMe3)2 | 88 |
| 8 | Pd(dba)2 | L1 | 2.5/5.0 | LiN(SiMe3)2 | 88 |
| 9 | Pd(dba)2 | L1 | 2.5/2.5 | LiN(SiMe3)2 | 96 |
| 10 | Pd(dba)2 | L1 | 2.5/2.5 | NaN(SiMe3)2 | 60 |
| 11 | Pd(dba)2 | L1 | 1.0/1.0 | LiN(SiMe3)2 | 95(94)c |
| 12 | Pd(dba)2 | L1 | 0.5/0.5 | LiN(SiMe3)2 | 77 |
Reactions conducted on a 0.1 mmol scale using 1 equiv of 1a, and 1.5 equiv of 2a.
Assay yields determined by 1H NMR spectroscopy of the crude reaction mixtures.
Isolated yield after chromatographic purification.