Table 1.
Comparison of the yield of the coupling of aryl halides with 4-methoxythiophenol after 24 h.
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Entry[a] | X | [Pd] | Yield (%)[b] |
1 | Br | Pd(OAc)2, CyPF-tBu | 0 |
2 | Br | Pd(dba)2, CyPF-tBu | 0 |
3 | Br | Pd(CyPF-tBu)(p-tolyl)(Br) | 99 |
4 | Cl | Pd(OAc)2, CyPF-tBu | 0 |
5 | Cl | Pd(dba)2, CyPF-tBu | 0 |
6 | Cl | Pd(CyPF-tBu)(p-tolyl)(Br) | 99 |
Reaction conditions: ArX (1 mmol), thiol (1 mmol), KOtBu (1.4 mmol), toluene (1.5 mL), 24 h.
Determined by GC using dodecane as internal standard.