Table 3.
entry | reactor | solvent | R [–] | T [°C] | residence time [min] | conversion [%]a |
3.1 | tubular | EtOAc | 0.9 | 140 | 20 | 75 |
3.2 | tubular | EtOAc | 0.9 | 140 | 30 | 95 |
3.3 | tubular | EtOAc | 0.9 | 140 | 40 | 99 |
3.4 | tubular | toluene | 0.9 | 120 | 40 | 93 |
3.5 | tubular | toluene | 0.9 | 140 | 40 | 99 |
3.6 | plate | toluene | 0.9 | 112 | 40 | 85 |
3.7 | plate | toluene | 0.9 | 130 | 40 | 93 |
3.8 | plate | toluene | 1.1 | 140 | 40 | ~100 |
3.9 | plate | toluene | 1.1 | 160 | 30 | 99 |
aConversions were calculated based on NMR.