US 2008/0176748 A1Published application

Novel herbicides and methods for preparation thereof

AssigneesNanjing Agricultural University, Nantong Jiangshan Agrochemical & Chemical Limited Liability Co., Ltd.

InventorsSheng Qiang, Shiguo Chen, Chunlong Yang, Xinbin Dai, Yunfa Dong

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Abstract

A series of herbicidal molecules derived from 3-acetyl-4-hydroxy-5-sec-butylpyrroline-2-ketone, a natural substance, and their potential use in agriculture for weed control. Through the modification of the 5-sec-butyl hydrocarbon chain and 3-acetyl group and the analysis of their biological functioning, newly designed molecules are superior to the original compound in herbicidal activity. These molecules inhibit the photosynthesis of the plants. The treated plants show significant damage in 24 hours and die within 3-5 days after the chemical treatment. In addition, the new molecule has relatively simple structure, they are easy to make and they have better physical properties. They are broad-spectrum, high potency herbicides.

Claims13

Dependent claims

A compound represented by the general formula (I), or (II), or a salt thereof

wherein
R1 independently and at each occurrence represents H;
or —CkH2k+1, —OCkH2k+1, —(C═O)CkH2k+1, —COOCkH2k+1, —CkH2k−1, —OCkH2k−1, —(C═O)CkH2k−1, or —COOCkH2k−1, each unsubstituted or substituted by one or more substituents selected from a heterocycle, an aryl, a phenylalkyl, a heterocycloalkyl phenyl, a heterocycloalkyl, a heterocycloalkoxyl, a phenoxyl;
a phenoxy phenyl;
a halogen, a cyano, a nitro, an alkoxyalkyl, an alkoxycarbonyl, and/or an amido;
R2, and R3 each independently and at each occurrence represent H, CnH2n+1, CnH2n−1, a halogen, —CN, a phenyl, a halogenated alkyl, a cyano-alkyl, a phenylalkyl, a halogenoalkenyl, a cyanoalkenyl, or a phenylalkenyl;
k represents an integer from 1 to 8;
and
n represent an integer from 1 to 15.

6 more elements

Dependencies are inferred from the claim text.