Entry  Catalyst  Solvent Condition Time (h) Time (h)
1 TMSCl CH3CN Reflux 14.0 36
2 PMA solid CH3CN Ref lux 11.0 42
3 FeCl3 CH3CN Ref lux 10.0 45
4 PTSA CH3CN Ref lux 9.0 45
5 5%WO3/ZrO2 CH3CN R.T 4.6 65
6 5%WO3/ZrO2 CH3CN  Reflux 0.5 94
Table 1: Effect of different reagents and solvents in the condensation of o-phenylenediamine 1, phenacyl bromide 2.