The gram scale (10 mmol nitrobenzene) batch and flow reaction are also evaluated. The batch reaction is conducted in a glass beaker with a rubber plug (Figure ). The isolated yield reaches 0.44 g without stirring and 0.54 g with stirring. It is found that the Sn plate will seriously deform and distort without stirring. It may be due to the SEI overgrowing and pressing the soft Sn plate. A stirring condition can greatly mitigate deformation and improve performance. The flow reaction is conducted in a self-built circulatory system with a homemade flow reactor (Figure ). It achieves a yield of 0.32 g with 10 rpm (19 mL/min).