Preparation of N'-[2-(5,6-Dimethylbenzothiazolyl)]-N-furfuryloxamide with Plant Growth Regulatory Activity.
作者:Tokujiro KITAGAWA、Chinatsu TSUTSUI
DOI:10.1248/cpb.48.1363
日期:——
The reaction of the N-furfuryloxamic acid sodium salt (12) with 1, 1'-oxalyldiimidazole (ODI) yielded the imidazolide (13) as an intermediate, and this directly reacted with 2-aminothiazole derivatives (14) or 2-aminobenzothiazole derivatives (15) under essentially neutral conditions to afford the N'-[2-(substituted thiazolyl)]- or N'-[2(substituted benzothiazolyl)]-N-furfuryloxamides (6 or 7).The prepared compounds (6 and 7) were examined for plant growth regulatory activity in a seed germination assay. The examination resulted in the discovery of some new revelations that N'-[2-(5, 6-dimethylbenzothiazlyl)]-N-furfuryloxamide (7c) at the concentration of 1.0×10-3M completely inhibited the radicle growth of both rape and leek seedings.
N-糠甲氧羰酰胺钠盐(12)与1,1'-草酰二咪唑(ODI)反应生成咪唑酯(13)中间体,该中间体在中性条件下直接与2-氨基噻唑衍生物(14)或2-氨基苯并噻唑衍生物(15)反应,得到N'-[2-(取代噻唑基)]-或N'-[2(取代苯并噻唑基)]-N-糠甲氧羰酰胺(6或7)。所制备的化合物(6和7)在种子发芽试验中检测其植物生长调节活性。检测结果发现了一些新的现象:N'-[2-(5,6-二甲基苯并噻唑基)]-N-糠甲氧羰酰胺(7c)在浓度为1.0×10-3M时完全抑制了油菜和大葱种子的胚芽生长。