4substituted ethyl2methyl6,7methylenedioxy3quinolinecarboxylate was prepared from 3,4methylenedioxy-phenylketones Ⅳ,yield of Ⅳa-Ⅳd is 74～87%.The synthetic route consists of acylation,nitration,reduction and condensation.Moleculor structures of Ⅳa～Ⅳd were determined by IR,1H NMR and MS.
Ten new disubstituted triazinyl carbantkyred derivatives were synthesized by the reaction of N-substitued trichloacetanlidel and 4,6-Dimethoxide-2-Ttiazinylurea undermicrowaveave irradiation.their structures were confirmed by elemental analy sis,IR,and（）1H NMR.The preliminary biological activity test of new compound was determined by hydropionics experiment.The results indicate that some of them show an obvious inhibitory activity for plant growth.At concentration of 1.0×10-3,the compound 3a-3e give inhibitory activity of 100%for cucumber,98%for wheat.At concentration of1.0×10-4,the compound gives inhibitory activity of 83.15～94.54%for cucumber,85.13～81.97%for wheat.
