Abstract: In this paper, 3-(2-chloro-5-pyridylmethyl)amino-2-cyano-3-methylthio ethyl acrylates 3 were synthesized. By the reaction of 3 as an intermediate with amines, 5 new 3-(substituted)amino-3-(2-chloro-5-pyridylmethyl)amino-2-cyano ethyl acrylates were prepared. When 3 reacted with hydrazine, the corresponding cyclic compound 4f was obtained. The preliminary bioassays showed that compounds 3 has good herbicidal activity.