Synthesis and Biological Activity of N5-(1-o-Chlorophenoxyethyl)-1,3,4-thiodiazol-2-yl- N'- aryloxyacetyl Thioureas

In order to search for high biological active pesticide, nine novel aryloxyacetyl thioureas have been synthesized by the reaction of 2-amino-5-(1-o-chlorophenoxyethyl)-1,3,4-thiodiazole with aryloxyacetyl isothiocyanates. The preliminary biological activity tests exhibited that some target compounds possessed a good activity as plant growth regulator, and 2c and 2d had better activities as auxin, the promoting rate were 26.9% and 27.2%.