Preparation and Root Growth-Modulatory Activity of N-Substituted 2-Acetylamino-2-ethoxycarbonyl-3-(2-furyl)propanamides.
作者:Tokujiro KITAGAWA、Naohiro AKIYAMA、Katsunori MASAI
DOI:10.1248/cpb.49.335
日期:——
However, bulky amines such as tert-butylamine or 2-trifluoromethylaniline did not afford the corresponding diamides (8). The biological activity of the prepared diamides (8) as root growth modulators was examined by germination assay using rape and leek seeds. N-(5-Bromo-2-thiazolyl)- and N-(4-chloro-2-benzothiazolyl)-2-acetylamino-2-ethoxycarbonyl-3-(2-furyl)propanamides (8h, i) both potently inhibited
通过胺(13)与2-乙酰氨基-2-乙氧基羰基-3-(2-呋喃基)丙酸的反应合成N-取代的2-乙酰氨基-2-乙氧基羰基-3-(2-呋喃基)丙酰胺(8) (3b)是通过将2-(溴甲基)呋喃(10b)与乙酰胺基丙二酸二乙酯缩合,然后在氢氧化钡的存在下将所得的二乙酯(3a)部分水解而制备的。但是,笨重的胺类(例如叔丁胺或2-三氟甲基苯胺)无法提供相应的二酰胺(8)。通过使用油菜和韭菜种子的发芽测定法检查了制备的作为根生长调节剂的二酰胺(8)的生物活性。N-(5-溴-2-噻唑基)-和N-(4-氯-2-苯并噻唑基)-2-乙酰氨基-2-乙氧基羰基-3-(2-呋喃基)丙酰胺(8h,i)均能有效抑制油菜幼苗的根系生长 但对韭菜种子的效果较差。在两种情况下,除草剂2,4-二氯苯氧基乙酸均完全抑制根系生长。