Process for Manufacturing Substituted 5-Methoxymethylpyridine-2,3-Dicarboxylic Acid Derivatives
申请人:Cortes David
公开号:US20110245506A1
公开(公告)日:2011-10-06
A process for manufacturing a 2,3-disubstituted-5-methoxymethylpyridine of formula (I), where Z is H or halogen; Z
1
is H, halogen, CN or NO
2
; Y
2
is OM, and M is an alkali metal or an alkaline earth metal, comprises the step of: (i) reacting a compound of formula (II) where Q is a tertiary aliphatic or cyclic, saturated, partially unsaturated or aromatic amine; Z is H or halogen; Z
1
is H, halogen, CN or NO
2
; Y
1
and Y
2
are each independently OR
1
, NR
1
R
2
, or when taken together Y
1
Y
2
is —O—, —S— or —NR
3
—; R
1
and R
2
are each independently H, C
1
-C
4
alkyl optionally substituted with C
1
-C
1
alkoxy or phenyl optionally substituted with one to three C
1
-C
4
alkyl groups, C
1
-C
4
alkoxy groups or halogen atoms, or phenyl optionally substituted with one to three C
1
-C
4
alkyl groups, C
1
-C
4
alkoxy groups or halogen atoms; R
3
is H or C
1
-C
4
alkyl, in a methanol/H
2
O mixture, comprising at least 20% by weight H
2
O (based on the sum of water and bromide (II)), with a base comprising MOCH
3
and/or MOH, where M is alkali metal or alkaline earth metal, under pressure in a closed vessel at a temperature of from 75 to 110° C. Compounds of formula (I) are useful intermediates in the synthesis of herbicidal imidazolinones, like imazamox.
一种制备式为(I)的2,3-二取代-5-甲氧甲基吡啶的工艺,其中Z为H或卤素;Z1为H、卤素、CN或NO2;Y2为OM,M为碱金属或碱土金属,包括以下步骤:(i)在甲醇/H2O混合物中,至少包含20%重量的H2O(基于水和溴化物(II)的总和),与包含MOCH3和/或MOH的碱基反应,其中M为碱金属或碱土金属,反应式为(II)的化合物,其中Q为三级脂肪族或环状、饱和、部分不饱和或芳香族胺;Z为H或卤素;Z1为H、卤素、CN或NO2;Y1和Y2各自独立地为OR1、NR1R2或当一起取时,Y1Y2为-O-、-S-或-NR3-;R1和R2各自独立地为H、C1-C4烷基(可选地取代为C1-C1烷氧基或苯基,可选地取代为一个至三个C1-C4烷基、C1-C4烷氧基或卤素原子的苯基),或苯基(可选地取代为一个至三个C1-C4烷基、C1-C4烷氧基或卤素原子),R3为H或C1-C4烷基,在封闭容器中,在温度为75至110°C的压力下进行。式(I)的化合物是合成除草剂咪唑烷酮(如伊马唑)的有用中间体。