1，2，3-噻二唑联-1，2，4-三唑衍生物的合成及抑菌活性

Synthesis and Fungicidal Activity of 1,2,3-Thiadiazole Containing 1,2,4-Triazoles

以4-氨基-3-(4-甲基-1,2,3-噻二唑)-1,2,4-三唑-5-硫酮为原料,与醛在冰乙酸中回流制得15个新型4-取代亚氨基-3-(4-甲基-1,2,3-噻二唑)-1,2,4-三唑-5-硫酮化合物,其结构经IR、1H NMR及元素分析表征,其中,化合物5c的结构经单晶测试确证,该晶体属单斜晶系,P2(1)/c空间群,晶胞参数a=1.403 7(3)nm,b=1.570 5(3)nm,c=0.6864(14)nm,β=102.06(3)°,V=1.4798(5)nm3,Z=4,F(000)=656。初步的抑菌活性测试结果表明;所有化合物对黄瓜灰霉病菌Botrytis cinerea都有较好的抑制作用,化合物5l的抑制率达87%,5c、5d和5f的抑制率在78%左右;5a对小麦赤霉病菌Gibberella zeae的抑制率为78.7%;5m对西瓜炭疽病菌Colletotrichum lagenarium的抑制率为65.6%。

Fifteen novel title compounds were synthesized from 3-（4-methyl-1,2,3-thiadiazolyl）-4-amino-1,2,4-triazolo-5-thione with substituted benzaldehyde in acetic acid under refluxing.The structures of the compounds were confirmed by elemental analysis,IR and ^1H NMR.The single crystal of compound 5c was cultured and determined by X-ray single-crystal diffraction as of a monoclinic system,space group P2（1）/c with cell parameters a=1.403 7（3） nm,b=1.570 5（3） nm,c=0.686 4（4） nm,β= 102.06（3）°,V=1.479 8（9） nm^3,Z=4,F（000）=656.Bioassaywas conducted by fungi growth inhibition method using 10 commonly used fungi which represented most disease occurring in China,the results showed that,all the title compounds had satisfactory fungicidal activity against Botrytis cinerea,the growth inhibition rate of compound 5l against Botrytis cinerea was up to 87%,for compound 5c,5d and 5f were more than 78%,compound 5a exhibited fungicidal activity against Gibberella zeae with growth inhibition of 78.7%,the growth inhibition rate of compound 5m against Colletotrichum lagenarium was 65.6%.