PREPARATION METHODS OF AZOXYSTROBIN AND ITS ANALOGS
申请人:Liu Shangzhong
公开号:US20100179320A1
公开(公告)日:2010-07-15
Preparation method of a compound of general formula (I) comprises the following steps: (1) a compound of general formula (II) reacts with a formylating agent in an aprotic solvent at a temperature between −20° C. and 200° C. in the presence of a Lewis acid, then an organic base is added to promote the reaction to obtain an intermediate product; (2) the above intermediate product reacts with a methylating agent in the presence of an alkali at a temperature between −20° C. and 100° C. to obtain the compound of formula (I).
The invention provides fungicidal compounds of formula (I) or stereoisomers thereof:
1
wherein X is CH
2
O; A is hydrogen; E is hydrogen; q is 1; any two of K, L and M are nitrogen and the other is CH; T is oxygen or sulfur; and Z is an optionally substituted phenyl group or an optionally substituted heterocyclyl group.
[EN] PROCESS FOR PREPARATION OF AZOXYSTROBIN AND INTERMEDIATES THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION D'AZOXYSTROBINE ET SES INTERMÉDIAIRES
申请人:UPL LTD
公开号:WO2020212919A1
公开(公告)日:2020-10-22
The present invention relates to a process for preparation of strobilurin compound, azoxystrobin and its intermediates using a catalyst selected from 1,8-Diazabicyclo[5.4.0]undec-7-ene or 1,5-Diazabicyclo[4.3.0]non-5-ene, salts thereof, or derivatives thereof.
[EN] PROCESS FOR THE PREPARATION OF FUNGICIDALLY ACTIVE STROBILURIN COMPOUNDS AND INTERMEDIATES THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS DE STROBILURINE À ACTIVITÉ FONGICIDE ET D'INTERMÉDIAIRES DE CEUX-CI
申请人:UPL LTD
公开号:WO2020212928A1
公开(公告)日:2020-10-22
The present invention relates to a process for the preparation of strobilurin of compounds of Formula (I) of and its intermediates using 1,5,7-triazabicyclo[4.4.0]dec-5-ene or salts thereof, or derivatives thereof as a catalyst. The present invention provides the compounds of formula (I) in high yield and high purity.
The present invention provides a process for preparing azoxystrobin, which is performed by reacting 2-cyanophenol or a salt thereof with a compound represented by formula I under the catalysis of a trimethylamine catalyst to obtain the azoxystrobin represented by formula II, which allows the yield of the product azoxystrobin to reach 98% or more, the yield of separated product to reach 95% or more and the post-processing to be simple. The trimethylamine catalyst can be recycled and reused in synthesizing the target product azoxystrobin, which not only reduces the cost but also reduces the total nitrogen and COD in wastewater. The advantages regarding of cost and environmental protection of the method according to the present invention are significant and thus the method is suitable for industrial production.