The screening is reported in Table . Gratifyingly, not only some catalytic activity is observed in virtually all solvents tested, but a quantitative yield of SA is obtained in MeCN under 15 bar of CO (Table , entry 8). Some general trends can be extracted from this screening. In toluene, anisole and DMC, the yield of SA and selectivity increase with decreasing CO pressure: under 5 bar, 38 to 51% of SA is obtained, with a selectivity up to 95% (Table , entries 1-6, 10-12). Noteworthy, the activity is completely suppressed at a CO pressure of 50 bar. In acetone, dioxane and EtOAc, the activity is enhanced at low pressure, but selectivity increases with pressure (Table , entries 13-15, 19-24). In DME, yields average around 70-75%, but higher selectivity is achieved at high CO pressure (Table , entries 16-18, 28-30).