Processes For the Preparation of Azoxystrobin Using Dabco as a Catalyst and Novel Intermediates Used in the Processes
申请人:Whitton Alan John
公开号:US20080214587A1
公开(公告)日:2008-09-04
The present invention relates, inter alia, to a process for preparing a compound of formula (I): which comprises either (a) reacting a compound of formula (II): with 2-cyanophenyl, or a salt thereof, in the presence of between 0.1 and 2 mol % of 1,4-diazabicyclo[2.2.2]octane, or (b) reacting a compound of the formula (III): with a compound of the formula (IV): in the presence of between 0.1 and 2 mol % of 1,4-diazabicyclo[2.2.2]octane; where W is the methyl (E)-2-(3-methoxy)acrylate group C(CO
2
CH
3
)═CHOCH
3
or the methyl 2-(3,3-dimethoxy)propanoate group C(CO
2
CH
3
)CH(OCH
3
)
2
, or a mixture of the two groups. In addition, the present invention relates to a novel precursors of the compound of formula (I) and methods for making them.
本发明涉及制备公式(I)化合物的方法,其中包括:(a)在1,4-二氮杂双环[2.2.2]辛存在下,将公式(II)化合物与2-氰基苯或其盐反应;或(b)在1,4-二氮杂双环[2.2.2]辛存在下,将公式(III)化合物与公式(IV)化合物反应,其中W是甲基(E)-2-(3-甲氧基)丙烯酸酯基团C(CO2CH3)═CHOCH3或甲基2-(3,3-二甲氧基)丙酸酯基团C(CO2CH3)CH(OCH3)2或两种基团的混合物。此外,本发明还涉及公式(I)化合物的新前体物及其制备方法。