O-LINKED PYRIMIDIN-4-AMINE-BASED COMPOUNDS, COMPOSITIONS COMPRISING THEM, AND METHODS OF THEIR USE TO TREAT CANCER
申请人:Augeri David J.
公开号:US20080146571A1
公开(公告)日:2008-06-19
O-linked pyrimidin-4-amine-based compounds, pharmaceutical compositions comprising them, and methods of their use are described. Particular compounds of the invention are of formula I:
[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.
PREPARATION METHOD FOR AZOXYSTROBIN AND INTERMEDIATE THEREOF
申请人:PURPANA (BEIJING) TECHNOLOGIES CO., LTD
公开号:US20210009532A1
公开(公告)日:2021-01-14
The present invention relates to the preparation field of azoxystrobin, and discloses a preparation method for a compound represented by formula (I). The method comprises the following steps: (1) a compound represented by formula (II) is hydrolyzed in a solvent under acidic conditions to obtain a compound represented by formula (III); and (2) the compound represented by formula (III) is reacted with a base and a methylating agent to obtain the compound represented by formula (I); in the formula, R
3
is hydrogen or C
1
-C
4
alkyl, and R
4
is C
1
-C
4
alkyl. The process for preparing azoxystrobin of the present invention not only successfully replaces trimethyl orthoformate and reduces the raw material cost, but also has high total reaction yield, and is suitable for industrial large-scale production. Experiments have proven that the yield of the prepared azoxystrobin can reach 95%.