Abstract A series of novel 2-cyanoacrylates containing the 1, 2, 3-thiadiazole ring moiety were synthesized and characterized by 1H NMR, 13C NMR, elemental analysis and, in one case, by X-ray crystallography. Most of these cyanoacrylates exhibited good herbicidal activities. In particular,(Z)-methoxyethyl-and (Z)-ethoxyethyl-2-cyano-3-isopropyl-3-(4-methyl- 1, 2, 3-thiadiazol-5-yl) methylaminoacrylate 9h and 9g showed 100% herbicidal activities ...