Synthesis and Herbicidal Activities of 2-Methylpropan-2-aminium O-Methyl 1-（Substituted Phenoxyacetoxy）alkylphosphonates

A series of 2-methylpropan-2-aminium O-methyl 1-（substituted phenoxyacetoxy）alkylphosphonates （5a-5o） was selectively synthesized by reacting the corresponding O,O-dimethyl l-（substituted phenoxyacetoxy）-alkylphosphonates with an excess of 2-methylpropan-2-amine.The results of preliminary bioassays...

Full description

Saved in:
Bibliographic Details
Published in:高等学校化学研究：英文版 2014 (1), p.82-86
Main Author: PENG Hao DENG Xiaoyan GAO Ling TAN Xiaosong HE Hongwu
Format: Article
Language:English
Subjects:
乙酰氧基
二氯苯氧乙酸
取代苯
合成
标题化合物
烷基
膦
除草活性
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A series of 2-methylpropan-2-aminium O-methyl 1-（substituted phenoxyacetoxy）alkylphosphonates （5a-5o） was selectively synthesized by reacting the corresponding O,O-dimethyl l-（substituted phenoxyacetoxy）-alkylphosphonates with an excess of 2-methylpropan-2-amine.The results of preliminary bioassays show that the title compounds exhibit moderate to good herbicidal activities against Brassica napus and Echinochloa crusgalli.Furthermore,compounds 5a-5j,which show much higher activities than compounds 5k-5o,were selected to further evaluate their post-emergence herbicidal activity at a dosage of 150 g/ha（l ha=10000 m2）.Especially,2-methylpropan-2-aminium O-methyl 1-[2-（4-chloro-2-methylphenoxy）acetoxy]butylphosphonate（5h） shows 100％ inhibitory effect on the growth of Brassica juncea and Amaranthus retroflexus,which is comparable with the commercial herbicide 2,4-dichlorophenoxy acetic acid（2,4-D）.
ISSN:1005-9040
2210-3171