Parallel Synthesis of a Library of Acylsemicarbazides Using a Solution-Phase One-Pot Method and Their Evaluation as Crop-Protection Agents
作者:Robert A. Batey、Justyna A. Grzyb、Mark A. Dekeyser
DOI:10.1055/s-2005-870020
日期:——
A solution-phase one-pot synthesis of a 40-member acylsemicarbazide library is outlined. The acylsemicarbazides were prepared by reacting various hydrazides with N,N′-carbonyldiimidazole (CDI) to generate 1,3,4-oxadiazole-2-one intermediates, which were then opened in situ with amines. Purification in the majority of cases was accomplished through filtration of the precipitated product in generally good yields and with ³ 95% purities. An analogous synthesis of acylthiosemicarbazides was accomplished using N,N′-thiocarbonyldiimidazole (TCDI). The library was then assayed for herbicidal, insecticidal, fungicidal and plant growth regulatory behavior.
本文概述了一种溶液相单锅合成 40 个成员的酰基缩氨基脲库的方法。酰基micarbazides 是通过各种酰肼与 N,N′-羰基二咪唑 (CDI) 反应生成 1,3,4-恶二唑-2-酮中间体,然后用胺原位打开而制备的。大多数情况下,纯化都是通过过滤沉淀产物来完成的,收率普遍较高,纯度达 95%。使用 N,N′-硫代羰基二咪唑 (TCDI) 完成了酰硫代氨基脲的类似合成。然后对该化合物库进行了除草、杀虫、杀真菌和植物生长调节行为的检测。