The Ammonite family of electrolysis cells are designed to make electrosynthesis a routine and user friendly procedure in synthetic chemistry laboratories. The unique cell design combines selective chemical change with a high conversion. Synthesis is in a single pass of reactant through the microflow electrolysis cell despite a short residence time. These characteristics allow the synthesis of grams of product within a short time. The cells are also suited to electrosynthesis using solutions with only a low electrolyte solution.