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Synthesis and Herbicidal Activity of 2-Cyano-3-methylthio-3-substituted Methylaminoacrylates

✍ Scribed by Ying Gao; Xiao-Mao Zou; Li-Min Yu; Han Xu; Bin Liu; You-Quan Zhu; Fang-Zhong Hu; Hua-Zheng Yang

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
75 KB
Volume
24
Category
Article
ISSN
0256-7660

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✦ Synopsis

Abstract

A series of 2‐cyano‐3‐methylthio‐3‐substituted methylaminoacrylates were synthesized as herbicidal inhibitors of photosystem II (PSII) electron transport, in order to estimate the effect of fluorine atom, pyridyl group, chirality and ester chain on activity. The important intermediate 2‐fluoro‐5‐aminomethylpyridine was synthesized with high yield. The bioassay results showed that most of title compounds had high herbicidal activity in postemergence treatment. The introduction of an α‐methyl into the 3‐substituted methylamino could improve the activity notably. The replacement of hydrogen by chlorine or fluorine group and phenyl by pyridyl group showed different effects, and at the same time, the ester chain affected the activity too.

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