Synthesis and Structure−Activity Relationships of Substituted Cinnamic Acids and Amide Analogues: A New Class of Herbicides
作者:Shipra Vishnoi、Vikash Agrawal、Virendra K. Kasana
DOI:10.1021/jf8034385
日期:2009.4.22
In the present investigation, substituted cinnamicacids (3-hydroxy, 4-hydroxy, 2-nitro, 3-nitro, 4-nitro, 3-chloro, and 4-methoxy) and their amide analogues with four different types of substituted anilines have been synthesized. The synthesized compounds have been screened for their germination inhibition activity on radish (Raphanus sativus L. var. Japanese White) seeds at 50, 100, and 200 ppm concentrations
Microwave irradiation method was used for synthesis of isoxazolines. Claisen Schmidt reaction of different aromatic aldehydes with acetanilide gave acrylamides (1a-1h) which on further reaction with hydroxylamine hydrochloride (in the presence of sodium hydroxide) afforded isoxazolines (2a-2h). Physical data of all the synthesized compounds were recorded. Isoxazolines were characterized by their IR and 1H NMR spectra. All the synthesized isoxazolines were screened for their antifungal activity against fungi namely Drechslera maydis and Rhizoctonia solani isolated from maize. Isoxazolines having chloro substitution on benzene ring found to be most effective followed by fluoro and nitro substituted compounds. None of the compound was registered as effective as Bavistin.