synthesis of pymetrozine is reported, starting from a green chemical dimethylcarbonate and using the key intermediate methyl (E)-1-(2-oxopropyl)-2-(pyridin-3-ylmethylene)hydrazine-1-carboxylate. The main advantages of the route include inexpensive starting materials, environmentalfriendliness, short synthetic route, easy-to-use synthetic method and acceptable overall yield. A scale-up experiment was