CN1376145A - 间硝基苯酚衍生物及其制备方法 - Google Patents

间硝基苯酚衍生物及其制备方法 Download PDF

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CN1376145A
CN1376145A CN 99815841 CN99815841A CN1376145A CN 1376145 A CN1376145 A CN 1376145A CN 99815841 CN99815841 CN 99815841 CN 99815841 A CN99815841 A CN 99815841A CN 1376145 A CN1376145 A CN 1376145A
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应百平
S·古普塔
塚本正满
D·A·普尔曼
芳贺隆弘
池口雅彦
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Ishihara Sangyo Kaisha Ltd
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Abstract

本发明涉及一种具有式(I)的间硝基苯酚衍生物,式(I)中X为卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;Y为氢、卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;Z为氧、硫或NR;R为氢或C1-6烷基;Ar为可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基团取代的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基。

Description

间硝基苯酚衍生物及其制备方法
本发明涉及一种农用化学品中间体及其生产方法。
                  发明背景
在国际发明公布号WO98/41093中公开了一些除草化合物及其制备方法。但对本发明中的间硝基苯酚衍生物未作描述。
要从相应的酚类制得间硝基苯酚衍生物有一些困难,因为酚类的-OH基在硝化过程中存在邻位-对位定向效应。因此,酚类的硝化反应必须在有合适的保护基团如烷氧碳酰基等保护-OH基后才能进行。虽然间硝基苯酚衍生物可以用这种方法制得,但其缺点是工艺路线长且不适合工业化生产。
本发明人进行研究以克服所述方法中的缺点。结果是得到有关当酚类的-OH被特定的取代基取代时所进行的间位硝化反应的知识。
                  本发明综述
本发明的一个方面是具有式(I)的间硝基苯酚衍生物,
Figure A9981584100071
式中X为卤素、氰基、C1-6卤代烷基或C1-6卤代烷氧基;Y为氢、卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Z为氧、硫或NR;R为氢或C1-6烷基;
Ar为可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基团取代的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基。
本发明的另一个方面是用具有式(II)的化合物与硝酸反应生产式(I)间硝基苯酚衍生物的方法,式(II)中X、Y、Z和Ar的定义同上。
Figure A9981584100081
                         本发明详述
在上述定义中,术语卤素代表F、Cl、Br或I。术语C1-6卤代烷基或C1-6卤代烷氧基代表C1-6烷基或C1-6烷基部分或全部被相同或不同的卤素原子取代的部分。术语C1-6烷基代表含有1-6个碳原子的直链或支链烷烃。
Ar代表的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基取代。如果Ar上有两个或更多的取代基,它们可以相同或不同。
本发明的间硝基苯酚衍生物优选如下:
(1)式(I)的化合物,其中X为卤素,Y为氢、卤素或氰基,Z为氧。
(2)式(I)的化合物,其中X为氟,Y为氢或氯,Z为氧。
(3)式(I)的化合物,其中Ar为2-吡啶基或2-嘧啶基,其中该吡啶基和嘧啶基可以用上述的取代基取代。
更优选式(I)化合物,其中X为氟,Y为氢或氯,Z为氧且Ar为2-吡啶基或2-嘧啶基,其中该吡啶基和嘧啶基可以用上述的取代基取代。
在生产具有式(I)的间硝基苯酚衍生物的方法中,硝化反应既可以单独用发烟硝酸或在醋酸中的发烟硝酸也可用硫酸存在下的硝酸来完成。该方法中每摩尔式(II)的化合物通常使用1到4摩尔(优选1至2摩尔)的硝酸。
反应在0-30℃下进行,反应时间通常为0.5至2小时。
式(II)化合物可以通过如下方法制得。
Figure A9981584100091
在上述反应式中,X、Y、Z和Ar的定义同上,Hal为卤素,R为未取代的或用卤素和烷基等取代的烷基、苯基或苄基。
本反应在溶剂和碱的存在下进行。例如,溶剂可以是如非质子型极性溶剂如乙腈、甲基乙基酮、二甲基亚砜或N,N-二甲基甲酰胺。碱可以为如碱金属氢化物如氢化钠或氢化钾;碱金属氢氧化物如氢氧化钠或氢氧化钾;碱金属烷氧化物如甲醇钠或乙醇钠;碱金属碳酸盐如碳酸钠或碳酸钾;或叔胺如三乙胺;或吡啶。反应温度通常为从0℃至250℃,优选为从20℃至150℃。反应时间通常为从1至12小时。
在式(II)化合物中,2-(2-氯-4-氟苯氧基)嘧啶或2-(4-氟苯氧基)嘧啶是新型化合物。
式(I)化合物用作农用化学品特别是除草化合物的中间体。可按WO98/41093中所描述的方法从式(I)化合物或其相应的氨基衍生物来制备除草化合物。式(I)化合物可以转化成氨基衍生物。
Figure A9981584100092
在上述反应式中,X、Y、Z和Ar的定义同上。
本反应在典型的反应条件下进行,如使用铁、锡、氯化亚锡(二价)或锌在醋酸或含醇盐酸中处理,或者用钯炭、二氧化铂、阮来镍、铑或钌作催化剂进行氢化。
在氨基衍生物中,其中Y为氢原子的衍生物可以转化为其中Y为卤素的胺基衍生物。在上述反应式中,X、Z和Ar的定义同上。
卤化反应可以通过使用卤化剂如溶于溶剂中的N-氯代琥珀酰亚胺、磺酰氯或氯气在有或没有脱卤化氢剂存在的条件下于10-150℃的温度下反应1-24小时来实施。卤化剂和脱卤化氢剂的量可以分别为起始化合物的1-4当量和0.001-1当量。用于反应的溶剂的例子有脂肪烃如己烷、戊烷;卤代烃如二氯甲烷、氯仿、1,2-二氯乙烷、氯苯;醚类如二乙基醚、二噁烷、四氢呋喃;酯类如乙酸乙酯、乙酸丁酯;硝基化合物如硝基苯;酰胺类如N,N-二甲基甲酰胺;硫化合物如二甲基亚砜;胺类如吡啶、三乙胺等。可以使用单种溶剂或混合溶剂。脱卤化氢剂可以用有机碱或无机碱。这类例子有吡啶、三乙胺、氢氧化钠、氢氧化钾、碳酸钠、碳酸钾等。反应完毕,产物用常规后处理方法如加入水并用有机溶剂萃取来分离。如有必要可以用各种方法如重结晶或色谱法提纯。
式(I)化合物可以通过如下方法制得。
在上述反应式中,X、Y、Z和Ar的定义同上,G为卤素;可以被卤素或烷基取代的烷基磺酰基;可以被卤素或烷基取代的苯基磺酰基;可以被卤素或烷基取代的苄基磺酰基。
本反应在碱的存在下进行。碱可以为如碱金属氢化物如氢化钠或氢化钾;碱金属氢氧化物如氢氧化钠或氢氧化钾;碱金属碳酸盐如碳酸钠或碳酸钾;或吡啶。
如果需要,本反应在溶剂的存在下进行。例如,溶剂可以是极性溶剂如二甲基亚砜、N,N-二甲基甲酰胺或1,3-二甲基-咪唑啉酮;芳族溶剂如甲苯、二甲苯或吡啶;醚类如四氢呋喃或二噁烷。
本反应最好在催化剂的存在下进行以提高收率。催化剂的例子可以为碱金属卤化物如碘化钾、溴化钾或氯化钾;卤化亚铜如碘化亚铜、溴化亚铜或氯化亚铜;卤化铜如碘化铜、溴化铜或氯化铜;金属铜。
如果必要的话,反应在共沸蒸馏作用下进行。
反应温度通常为0℃至350℃,优选为100℃至200℃。反应时间通常为1至12小时。
式(III)化合物可以通过下面反应方程式制得。
Figure A9981584100111
在上述反应式中,X、Y、Z和Ar的定义同上。溶剂可以是非质子极性溶剂如二乙基醚、腈、甲基乙基酮或二甲基亚砜,质子溶剂如水、乙醇或醋酸。使用上述溶剂的混合溶剂有时可以得到更好的结果。
重氮化剂可以使用各种亚硝酸盐(酯)化合物如亚硝酸钠、***或亚硝酸叔丁酯。
反应温度通常为-10℃至10℃,优选为-5℃至5℃。反应时间通常为0.5至12小时。
式(III)化合物是有用的中间体,其根据下列反应式通过与某些(杂)芳族硼酸反应来提供除草化合物(IV),化合物(IV)在苄基环与(杂)芳环之间具有C-C键。
Figure A9981584100121
                         实施例
本发明将在下列实施例中作进一步的描述,但本发明并不局限于此。实施例1.    2-(2-氯-4-氟苯氧基)嘧啶的合成
将6.0g的2-氯-4-氟苯酚、5.3g的2-氯嘧啶和0.61g的碳酸钾在150ml甲基乙基酮和50ml的DMSO中混合,并在回流温度下加热4小时。反应混合物在水和乙酸乙酯中分配,用硫酸钠干燥,蒸发而得到目标化合物(固体,8.54g,收率93%)。[1H NMR,CDCl3,δ7.08(2H,m),7.25(2H,m),8.57(2H,d,J=4.8Hz)ppm]。实施例2.    2-(2-氯-4-氟-5-硝基苯氧基)嘧啶的合成
将7.0g的2-(2-氯-4-氟苯氧基)嘧啶溶于70ml硫酸中,在室温下滴加入4ml硝酸并搅拌2小时。反应混合物倒入碎冰中并搅拌1小时(最后体积为700ml)。过滤收集沉淀,用水洗涤,在空气中干燥得到6.17g 2-(2-氯-4-氟-5-硝基苯氧基)嘧啶。滤液用氢氧化钠中和,用乙酸乙酯100ml萃取,将其用50ml水洗涤蒸发而得到一种油状物(0.39g)。总收率为78%。[1H NMR,CDCl3,δ7.20(1H,t,J=4.8Hz),7.50(1H,d,J=10.0Hz),8.07(1H,d,J=6.9Hz),8.61(2H,d,J=4.8Hz)ppm]。
用类似的方法合成下列化合物。
4-氯-2-(2-氯-4-氟-5-硝基苯氧基)嘧啶[1H NMR,DMSO-d6,δ6.21(1H,d,J=7.0Hz),7.81(1H,d,J=10.5Hz),7.87(1H,d,J=6.9Hz),8.12(1H,d,J=7.0Hz)ppm]。
6-氯-3-(2-氯-4-氟-5-硝基苯氧基)哒嗪[1H NMR,丙酮-d6,δ7.54(1H,d,J=9.1Hz),7.63(1H,d,J=10.1Hz),7.78(1H,d,J=9.1Hz),8.16(1H,d,J=6.9Hz)ppm]。
3-氯-2-(2-氯-4-氟-5-硝基苯氧基)吡嗪[1H NMR,DMSO-d6,δ8.04(1H,d,J=10.6Hz),8.16(1H,d,J=2.6Hz),8.29(1H,d,J=2.6Hz),8.40(1H,d,J=7.1Hz)ppm]。
6-氯-2-(2-氯-4-氟-5-硝基酚基)吡嗪[1H NMR,DMSO-d6,δ8.1(1H,d,J=10.6Hz),8.42(1H,d,J=6.9Hz),8.56(1H,s),8.69(1H,s)ppm]。实施例3.    2-(2-氯-4-氟-5-硝基苯氧基)嘧啶的合成
将0.5g的2-(2-氯-4-氟苯氧基)嘧啶在搅拌下缓慢加入2ml发烟硝酸中。溶液在室温下搅拌2小时并加入冰水。产物用乙酸乙酯分配来分离,有机层用水洗涤,干燥(无水硫酸钠)和蒸发而得到0.47g标题化合物(78%)。实施例4.    2-(2-氯-4-氟-5-硝基苯氧基)嘧啶的合成
在含有1.0g 2-(2-氯-4-氟苯氧基)嘧啶的2ml醋酸中加入20ml发烟硝酸。溶液在室温下搅拌过夜。将反应混合物倒入碎冰中。产生的沉淀过滤收集,用水洗涤,空气干燥而得到0.75g近白色的固体(收率62%)。实施例5.    2-(5-氨基-2-氯-4-氟苯氧基)嘧啶的合成
在含有6.56g 2-(2-氯-4-氟-5-硝基苯氧基)嘧啶的70ml醋酸溶液中加入6.79g的铁粉,生成的混合物在室温下搅拌3小时(TLC监测)。反应混合物用200ml乙酸乙酯稀释,用100ml水洗涤,然后用50ml饱和氯化钠溶液洗涤两次。水相用100ml乙酸乙酯萃取。乙酸乙酯萃取液用20ml饱和氯化钠洗涤两次。合并乙酸乙酯相,用硫酸钠干燥,浓缩至20ml。过滤收集晶体,用己烷-乙酸乙酯(4∶1)洗涤,在空气中干燥得到2-(5-胺基-2-氯-4-氟酚基)嘧啶(5.36g,产率92%。[1H NMR,CDCl3,δ6.69(1H,d,J=8.3Hz),7.06(1H,t,J=4.8Hz),7.10(1H,d,J=10.5Hz),8.56(2H,d,J=4.8Hz)ppm]。实施例6.    2-(5-胺基-2-氯-4-氟苯氧基)嘧啶的合成
在含有0.5g 2-(2-氯-4-氟-5-硝基苯氧基)嘧啶的5ml乙醇溶液中加入0.02g含量为5%的钯炭(4%,重量)。混合物在室温的氢气氛围中搅拌18小时。反应完毕,滤除催化剂,蒸发溶剂得到2-(5-氨基-2-氯-4-氟苯氧基)嘧啶0.43g。实施例7.    2-(5-氨基-2-氯-4-氟苯氧基)嘧啶的合成
在含有2.00g的2-(2-氯-4-氟-5-硝基苯氧基)嘧啶的40ml乙醇溶液中加入0.06g水合二氧化铂(3%,重量)。混合物在室温的氢气氛围中搅拌6小时。反应完毕,滤除催化剂,滤液蒸发得到粗产物1.83g。将粗产物通过硅胶层析(二氯甲烷为洗脱液)纯化得到纯的2-(5-氨基-2-氯-4-氟苯氧基)嘧啶1.61g。实施例8.    4-氯-2-氟-5-(2-嘧啶基氧)苯重氮氟硼酸盐的合成
将1.2g(5mmol)的4-氯-2-氟-5-(2-嘧啶基氧)苯胺同1.8ml氟硼酸(55%)和0.75ml水混合(放热反应),并冷却至-5℃,用420mg亚硝酸钠(6mmol)溶于2ml水形成的溶液处理。黄色的4-氯-2-氟-5-(2-嘧啶基氧)苯重氮氟硼酸盐结晶出来。在搅拌1小时后过滤,用水和二***洗涤,真空干燥。产量0.6g,分解温度188-90℃。实施例9.    2-(4-氟苯氧基)嘧啶的合成
将12.5g 4-氟苯酚、14.05g 2-氯嘧啶和18.47g碳酸钾在125ml的DMSO中混合,溶液在110℃下搅拌2小时。冷却后,将溶液加至水中,过滤分离沉淀,得到标题化合物17.17g(收率81%)。[1H NMR,CDCl3,7.0-7.21(5H,m)8.57(2H,d,J=4.8Hz)ppm]。实施例10.    2-(4-氟-3-硝基苯氧基)嘧啶的合成
将9.3g的2-(4-氟苯氧基)嘧啶溶于33.8ml浓硫酸中,溶液在冰的冷却下搅拌。搅拌下滴加3.4ml浓硝酸并在室温下搅拌2小时。将溶液倒入冰水中,产物用乙酸乙酯萃取。用***研成粉末得到8.05g产品(收率70%)。[1H NMR,CDCl3,7.15(1H,t,J=4.8Hz),7.37(1H,dd,J=9.3Hz),7.52(1H,m),7.99(1H,dd,J=2.9,6.2Hz)8.60(2H,d,J=4.8Hz)ppm]。实施例11.    2-(3-氨基-4-氟苯氧基)嘧啶的合成
将2.85g 2-(4-氟-3-硝基苯氧基)嘧啶溶于121ml的冰醋酸,在搅拌下分批缓慢加入3.39g铁粉。溶液在室温下氮气氛围中搅拌12小时。加入水,产物用乙酸乙酯萃取,有机层用水和盐水洗涤。蒸发得到1.86g标题化合物(收率75%)。[1H NMR,CDCl3,5.30(2H,br s),6.28(1H,m),6.52(1H,dd,J=2.7,7.7Hz),7.00(1H,dd,J=8.8,11.1Hz),7.24(1H,t,J=4.7Hz),8.63(2H,d,J=4.7Hz)ppm]。实施例12.    2-(5-氨基-2-氯-4-氟苯氧基)嘧啶的合成
将0.5g的2-(3-氨基-4-氟苯氧基)嘧啶溶于10ml的无水N,N-二甲基甲酰胺中,并加入0.33g的N-氯代琥珀酰亚胺。溶液在80℃下搅拌2小时,并加入水。产物用乙酸乙酯萃取,有机层用水和盐水洗涤,然后蒸发。剩余物在***中结晶得到0.44g标题化合物(收率75%)。实施例13.    2-(5-氨基-2-溴-4-氟苯氧基)嘧啶的合成
将0.45g的2-(3-氨基-4-氟苯氧基)嘧啶溶于10ml的无水N,N-二甲基甲酰胺中,加入0.39g的N-溴代琥珀酰亚胺。溶液在80℃下搅拌2小时,加入水。产物用乙酸乙酯萃取。有机层用水和盐水洗涤,然后蒸发。产物用硅胶层析(以己烷∶乙酸乙酯(6∶4)作洗脱剂)纯化得到0.41g标题化合物(收率66%)。[1H NMR,丙酮-d6,5.07(2H,br s),6.80(1H,d,J=8.3Hz),7.21(1H,t,J=4.7Hz),7.29(1H,d,J=10.6Hz),8.59(2H,d,J=4.7Hz)ppm]。实施例14.    2-氯-4-氟-5-硝基苯氧基2-嘧啶基醚的合成
将1.98g的2-氯-4-氟-5-硝基苯酚溶于10ml的无水四氢呋喃中,加入42mg氢化钠。在减压下移去溶剂,然后加入166mg碘化钾催化剂和1.27g的2-氯嘧啶。混合物在120℃下加热3小时,再在130℃左右加热1.5小时。冷却后加入乙酸乙酯,溶液采用吸滤法通过塞力特硅藻土过滤,滤液用盐水和3%的氢氧化钾溶液洗涤。有机层在用无水硫酸钠干燥,在减压下除去溶剂,得到棕色油状物。此油状物通过硅胶层析(以二氯甲烷作洗脱剂)纯化得到1.69g标题化合物(收率63%)。
表I所列为本发明的一些具有代表性的化合物的结构式。
                             表I
   序号     X    Y     Z     Ar
    1     F    Cl     O     2-嘧啶基
    2     Cl    Cl     O     2-嘧啶基
    3     F    Br     O     2-嘧啶基
    4     F    CN     O     2-嘧啶基
    5     F    CF3     O     2-嘧啶基
    6     F    NO2     O     2-嘧啶基
    7     F    OCHF2     O     2-嘧啶基
    8     F    Cl     O     4-氯-2-嘧啶基
    9     F    Cl     O     3-CF3-2-吡啶基
   10     F    Cl     O     5-CF3-2-吡啶基
   11     F    Cl     O     3-哒嗪基
   12     F    Cl     O     6-氯-3-哒嗪基
   13     F    Cl     O     2-吡嗪基
   14     F    Cl     O     3-氯-2-吡嗪基
   15     F    Cl     O     6-氯-2-吡嗪基
   16     F    Cl     O     4,6-二甲氧基-2-三嗪基
   17     F    Cl     O     4,6-二甲基-2-三嗪基
   18     F    Cl     O     3-对称四嗪基
   19     F    Cl     S     2-嘧啶基
   20     F    Cl     NH     2-嘧啶基
   20     F    Cl     NCH3     2-嘧啶基
   21     F    H     O     2-嘧啶基

Claims (12)

1.一种具有式(I)的化合物,
Figure A9981584100021
式中X为卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Y为氢、卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Z为氧、硫或NR;R为氢或C1-6烷基;
Ar为可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基团取代的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基。
2.按照权利要求1的化合物,其中X为卤素,Y为氢、卤素或氰基,Z为氧。
3.按照权利要求1的化合物,其中X为氟,Y为氢或氯,Z为氧。
4.按照权利要求1的化合物,其中Ar为在吡啶基和嘧啶基上可以用权利要求1中所定义的取代基取代的2-吡啶基或2-嘧啶基。
5.按照权利要求1的化合物,其中X为氟,Y为氢或氯,Z为氧,Ar为在吡啶基和嘧啶基上可以用权利要求1中所定义的取代基取代的2-吡啶基或2-嘧啶基。
6.一种制备具有式(I)的间硝基苯酚衍生物的方法,
Figure A9981584100022
式中X为卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Y为氢、卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Z为氧、硫或NR;R为氢或C1-6烷基;
Ar为可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基团取代的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基;
该制备方法包括用具有式(II)的化合物,式(II)中的X、Y、Z和Ar的定义同上,与硝酸反应。
7.2-(2-氯-4-氟苯氧基)嘧啶或2-(4-氟苯氧基)嘧啶。
8.一种制备具有下式的化合物的方法,
Figure A9981584100032
式中X为卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Hal为卤素;
Z为氧、硫或NR;R为氢或C1-6烷基;
Ar为可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基团取代的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基;
该制备方法包括下式的化合物
Figure A9981584100033
其中X、Z和Ar的定义同上,与卤化剂的反应。
9.一种具有式(III)的化合物,
Figure A9981584100034
式中X为卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Y为氢、卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Z为氧、硫或NR;R为氢或C1-6烷基;
Ar为可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基团取代的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基。
10.一种制备具有式(III)的化合物的方法,式中X为卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Y为氢、卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Z为氧、硫或NR;R为氢或C1-6烷基;
Ar为可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基团取代的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基;
该制备方法包括具有下式的化合物,其中X、Y、Z和Ar的定义同上,与氟硼酸和重氮化剂的反应。
11.一种制备氨基衍生物的方法,其包括:
(1)一种具有下式的化合物,式中X为卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Y为氢、卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Z为氧、硫或NR;R为氢或C1-6烷基;
和式为Ar-Hal或Ar-SO2R’的化合物进行缩合反应,上式中Ar为可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基团取代的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基;Hal为卤素;R’为可以被至少一个选自卤素和烷基的基团取代的烷基、苯基或苄基;
从而生成式(II)化合物,
Figure A9981584100051
式中X、Y、Z和Ar的定义同上;
(2)式(II)化合物与硝酸的硝化反应制备式(I)化合物,式中X、Y、Z和Ar的定义同上;和
(3)将式(I)化合物还原制得具有下式的化合物,
Figure A9981584100053
式中X、Y、Z和Ar的定义同上。
12.一种制备具有式(I)的间硝基苯酚衍生物的方法,
Figure A9981584100054
式中X为卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Y为氢、卤素、氰基、硝基、C1-6卤代烷基或C1-6卤代烷氧基;
Z为氧、硫或NR;R为氢或C1-6烷基;
Ar为可以用选自卤素、氰基、C1-6烷基、C1-6卤代烷基、C1-6烷氧基、C1-6卤代烷氧基、C1-6烷基磺酰基及C1-6卤代烷基磺酰基的至少一种取代基团取代的吡啶基、嘧啶基、哒嗪基、吡嗪基、对称三嗪基或对称四嗪基;
该制备方法包括用一种具有下式的化合物,式中X、Y和Z的定义同上,与一种式Ar-G的化合物的反应,上式中Ar的定义同上而且G为卤素、可以被卤素或烷基取代的烷基磺酰基、可以被卤素或烷基取代的苯基磺酰基、可以被卤素或烷基取代的苄基磺酰基。
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CN103288763A (zh) * 2013-06-20 2013-09-11 郑州福源动物药业有限公司 一种2,6-二氯吡嗪的工业化生产方法

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