How is (E)-N-[(6-Chloro-3-pyridinyl)methyl]-N-ethyl-N'-methyl-2-nitro-1,1-ethenediamine (CAS: 120738-89-8) typically synthesized?

This compound can be synthesized through a multi-step process involving the coupling of an ethylene diamine derivative with a substituted pyridine derivative followed by nitration. Common solvents include toluene, and the reaction is typically carried out at elevated temperatures under reflux conditions. The yield is moderate, around 60-70%, and the reaction is selective for the nitration step.