中文摘要：

吡啶作为苯环的生物等排体常被用作分子设计的有效基团，含吡啶类农药已成为近20多年来新农药刮制研究的热点领域之一。1，3，4-噻二唑衍生物具有杀虫、杀菌、除草、调节植物生长以及药物活性等多种功效口圳，因而该类化合物的研究迄今仍方兴未艾。本文根据活性亚结构连接法，将吡啶基、酰胺基、1，3，4-噻二唑环等活性基团拼接到同一分子中，以期获得高活性的植物生长调节物质，设计合成了一系列未见文献报道的[5-（3-吡啶基）-2-芳氧乙酰胺基-1，3，4-噻二唑。合成路线如下：

英文摘要：

Six derivatives of 2 - aryloxyacetylamido - 5 - （3 - pyridyl） - 1,3,4 - thiadiazoles 3a - 3f have been synthesized by the reactions of 2 - amino - 5 - （ 3 - pyridyl） - 1,3,4 - thiadiazoles and aryloxyacetyl chloride. Their stmctttres were characterized by^1H NMR,IR and elemental analysis. The crystal st ucture of 3d was determined by X - ray single crystal diffraction. The crystal of this compound belongs to moncolinic system with space group P21/c,a =0. 76550（7）nm,b =0. 90221（8）nm,c =2. 2927（2）nm, =92. 811 （2）° ,V = 1. 5816（2） nm^3 ,Z =4,De = 1. 601g/cm^3 ,μ =0. 559mm^-1 ,F（000） =776 ,R1 =0. 0419,wR2 =0. 1216. The preliminary biological activity tests showed that some title compounds have relatively good activity as plant growth regulator.