CN104817541B - 一种抗肿瘤药物的合成方法 - Google Patents
一种抗肿瘤药物的合成方法 Download PDFInfo
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- CN104817541B CN104817541B CN201510236812.0A CN201510236812A CN104817541B CN 104817541 B CN104817541 B CN 104817541B CN 201510236812 A CN201510236812 A CN 201510236812A CN 104817541 B CN104817541 B CN 104817541B
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- methyl
- methoxyl groups
- base
- methoxyl group
- methylamino
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- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 claims abstract description 15
- 125000000250 methylamino group Chemical group [H]N(*)C([H])([H])[H] 0.000 claims abstract description 15
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
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Abstract
本发明涉及一种抗肿瘤药物N‑[2‑[[2‑(二甲基氨基)乙基]甲基氨基]‑4‑甲氧基‑5‑[[4‑(1‑甲基‑1H‑吲哚‑3‑基)‑2‑嘧啶基]氨基]苯基]‑2‑丙烯酰胺(AZD9291)的合成方法及其关键中间体,将4‑氟‑2‑甲氧基‑5‑硝基苯胺经Boc酸酐保护得到4‑氟‑2‑甲氧基‑5‑硝基苯胺基甲酸叔丁酯,再与N,N,N’‑三甲基乙二胺反应得到4‑(N,N,N’‑三甲基乙二胺基)‑2‑甲氧基‑5‑硝基苯胺基甲酸叔丁酯,随后经过还原得到2‑(N,N,N’‑三甲基乙二胺基)‑4‑甲氧基‑5‑氨基甲酸叔丁酯苯胺,之后与丙烯酰氯反应完并直接脱Boc保护基得到2‑甲氧基‑4‑N,N,N’‑三甲基乙二胺基‑5‑丙烯酰胺基苯胺,最后与3‑(2‑氯嘧啶‑4‑基)‑1‑甲基吲哚反应得到AZD9291。该工艺步骤简单,收率较高,反应条件温和,易于工业化生产。
Description
技术领域
本发明属于医药化工领域,具体涉及一种肺癌晚期药N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺(AZD9291)的制备方法。
背景技术
肺癌是一直以来比较难以攻克的肿瘤之一。按基本病理分类,肺癌分为非小细胞肺癌和小细胞肺癌两大类。肺癌多为非小细胞肺癌,相对生长较慢,又可细分为鳞癌(squamouscell lung cancer)、腺癌(adenocarcinoma)与大细胞癌(large cell lungcancer)。近年来,针对致癌的基因突变,有许多所谓靶向性新药(targetedtherapy)不断涌现。与通常的化学疗法相比,靶向性药物由于主要影响带有相应突变的癌细胞,毒副性较低,同时有效率升高。文献研究表明,非小细胞肺癌中有一类是由于表皮细胞生长素受体(EGFR)突变所导致。与众多同样针对EGFR突变的竞争药相比,AZD9291具有一个突出的优势:它不仅能抑制致癌的EGFR突变,同时也能持续抑制抗药性的EGFR突变。其它的EGFR抑制剂,诸如gefitinib(阿斯利康)以及erlotinib(基因泰克Genentech和罗氏制药Roche),也能够靶向性的抑制具有EGFR突变的肺癌细胞生长。但不幸的是,这些药物都只能短暂见效,癌细胞通常会相应发展出抗药性的突变。在多于60%的病例中,EGFR突变型非小细胞肺癌的抗药突变发生在EGFR序列中第790位点,由原来的苏氨酸变成甲氨酸(T790M)。这一突变可以有效阻挠一般的EGFR抑制剂与EGFR发生作用,从而达到癌细胞抗药的目的。但AZD9291不会受EGFR T790M抗药突变的干扰,仍然能持续抑制癌细胞的生长,因此特别适用于其它EGFR抑制治疗失败的中后期病人。
《Preparation of 2-(2,4,5-substituted-anilino)pyrimidine derivativesas EGFR modulators useful for treating cancer》(WO201301444408)一文公开了AZD9291的合成方法,以4-氟-2-甲氧基苯胺为原料,首先硝化得到4-氟-2-甲氧基-5-硝基苯胺,再与3-(2-氯嘧啶-4-基)-1-甲基吲哚在对甲苯磺酸一水化合物的催化下反应得到N-(4-氟-2-甲氧基-5-硝基苯)-4-(1-甲基-1H-吲哚-3-基)嘧啶-2-胺,之后N,N,N’-三甲基乙二胺亲核取代氟原子,再用铁铵还原硝基,随后与3-氯丙酰氯反应再消除反应得到AZD9291,反应的总收率为17.5%。反应方程式如下:
该路线采用铁铵还原法还原硝基,反应后处理首先要用离子交换树脂进行预处理,使AZD9291工业化生产变得非常困难。
发明内容
本发明目的是寻找一条替代现有路线的,具有操作简单,收率较高,成本较低,适宜于工业化生产特点的AZD9291新的合成路线。
本发明具体技术方案如下:
一种N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,包括如下步骤:
(1)4-氟-2-甲氧基-5-硝基苯胺经Boc酸酐保护后得到4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯:
由于4-氟-2-甲氧基-5-硝基苯胺的亲核性较弱,优选使用催化剂4-二甲氨基吡啶或者吡啶先与二碳酸二叔丁酯(Boc酸酐)形成活性中间体,然后再与4-氟-2-甲氧基-5-硝基苯胺发生亲核取代反应得到单Boc保护的4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯。
步骤(1)中反应溶剂优选使用二氯甲烷、乙腈、1,2-二氯乙烷、甲苯中的一种或几种,优选反应温度为30~60℃,反应时间为4~10h。优选4-氟-2-甲氧基-5-硝基苯胺与Boc酸酐的摩尔比为1.0:1.0~1.5。
(2)将步骤(1)中得到的4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯与N,N,N’-三甲基乙二胺反应得到化合物4-(N,N,N’-三甲基乙二胺基)-2-甲氧基-5-硝基苯胺基甲酸叔丁酯:
上述反应为亲核取代反应,反应溶剂必须拥有足够的溶剂化能力,才能使反应发生,所以优选非质子极性溶剂,更优选为N,N-二甲基甲酰胺、二甲基亚砜、N,N-二甲基乙酰胺、六甲基磷酰三胺、1,3-二甲基-2-咪唑啉酮中的一种或几种。
由于反应有氢氟酸生成,加入适量的碱(缚酸剂)可以促进反应的进行,优选无机碱或有机碱,所述无机碱或者有机碱选自碳酸钠、碳酸氢钠、碳酸钾、三乙胺、N,N-二异丙基乙胺中的一种或几种。优选4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯、N,N,N’-三甲基乙二胺、碱的摩尔比为1:1~1.2:1.2~1.8。
上述反应优选温度为40~70℃,反应时间为1.5~8h。
(3)将步骤(2)得到的化合物4-(N,N,N’-三甲基乙二胺基)-2-甲氧基-5-硝基苯胺基甲酸叔丁酯经还原反应后得到化合物2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺:
上述还原反应优选钯碳催化加氢还原,优选温度为15~30℃,反应时间为1~3h。优选钯碳的用量为4-(N,N,N’-三甲基乙二胺基)-2-甲氧基-5-硝基苯胺基甲酸叔丁酯重量的2%~10%。
考虑到溶解性的因素,优选反应在醇类溶剂中进行,更优选甲醇、乙醇、正丙醇、异丙醇中的一种或几种。
(4)将步骤(3)得到的化合物2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺与丙烯酰氯反应后脱去Boc保护基后得到化合物2-甲氧基-4-N,N,N’-三甲基乙二胺基-5-丙烯酰胺基苯胺:
上述反应中化合物2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺先与丙 烯酰氯反应,之后在过量酸性条件下脱去Boc保护基,优选2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺与丙烯酰氯的摩尔量比为1:1.0~1.5。
优选在冰浴下将2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺溶解于环醚类溶剂,滴加入丙烯酰氯,由于滴加丙烯酰氯的时候反应放热比较快,为减少迈克尔加成反应的发生,优选滴加温度为0~10℃。滴加完毕后反应5~30min,然后加入4NHCl(aq),15~35℃下反应2~12h,经碱中和萃取后得到化合物2-甲氧基-4-N,N,N’-三甲基乙二胺基-5-丙烯酰胺基苯胺。
上述环醚类溶剂优选自四氢呋喃、1,4-二氧六环、2-甲基呋喃、1,3-二氧戊烷中的一种或几种。
(5)化合物2-甲氧基-4-N,N,N’-三甲基乙二胺基-5-丙烯酰胺基苯胺与3-(2-氯嘧啶-4-基)-1-甲基吲哚反应得到N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺:
由于嘧啶环中2-位的氯反应活性较低,因此优选使用酸作为催化剂活化嘧啶环,从而使苯胺的亲核取代反应能够进行,优选酸为甲磺酸、对甲苯磺酸、对甲苯磺酸一水合物中的一种或几种。优选反应温度为50~65℃,反应时间为3~8h。
反应溶剂优选醇类溶剂,更优选自2-戊醇、正丁醇、正丙醇、异丁醇中的一种或几种。
上述总反应路线如下所示:
本发明还公开了AZD9291合成过程中三个重要的中间体,4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯、4-(N,N,N’-三甲基乙二胺基)-2-甲氧基-5-硝基苯胺基甲酸叔丁酯和2-甲氧基-4-N,N,N’-三甲基乙二胺基-5-丙烯酰胺基苯胺,结构如下:
本发明方法优点:
(1)本条路线每步收率较高,总收率65.4%。相比较原路线收率有大幅提高,而且新合成方法的反应条件温和,后处理简单,对环境友好;步骤(5)反应温度为50~65℃,相对于原有路线类似步骤反应的100~115℃,降低了反应所需的温度,节约了成本。
(2)本发明步骤(3)中采用在常温下钯碳催化加氢还原的方法还原硝基,避免了原路线中使用铁铵还原的方法,避开了用离子交换树脂后处理的繁杂操作,增加了收率,同时降低了反应的高温要求,节省了成本,有利于工业化生产。
具体实施方式
下述实施实例用于进一步解释本发明,但不限制本发明的范围。
实施例1:化合物4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯的制备
将500mg(2.69mmol)4-氟-2-甲氧基-5-硝基苯胺,586.24mg(2.69mmol Boc酸酐和10ml乙腈加入到单口瓶中,升温至55℃反应6h,减压旋蒸掉乙腈,加入5ml乙酸乙酯溶解体系,搅拌下缓慢加入1ml石油醚析出固体,过滤,得到黄色固体639mg,收率84%。
实施例2:化合物4-(N,N,N’-三甲基乙二胺基)-2-甲氧基-5-硝基苯胺基甲酸叔丁酯的制备
氮气/氩气保护下,将200mg(0.698mmol)4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯,78.47mg(0.768mmol)N,N,N’-三甲基乙二胺,117.27mg(0.907mmol)N,N-二异丙基乙胺和10mlN,N-甲基乙酰胺加入到50ml单口烧瓶中,升温至45℃,搅拌反应2h,降至室温,加入40ml水,用20ml二氯甲烷萃取两次,合并有机层,用饱和食盐水洗涤,干燥,抽滤,旋干二氯甲烷得到252mg亮橙色固体,收率98%。
实施例3:化合物2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺的制备
氮气/氩气保护下,将500mg(1.3mmol)4-(N,N,N’-三甲基乙二胺基)-2-甲氧基-5-硝基 苯胺基甲酸叔丁酯,2.5mg钯碳,50ml甲醇加入到100ml的单口烧瓶中,体系用氢气置换三次,室温下搅拌反应2h,在滤纸上加垫一层硅藻土,体系过滤,旋干母液,得到棕褐色油状物422.4mg,收率96%。
实施例4:化合物2-甲氧基-4-N,N,N’-三甲基乙二胺基-5-丙烯酰胺基苯胺的制备
氮气/氩气保护下,将500mg(1.48mmol)2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺冰浴下溶解于15ml 1,4-二氧六环中,缓慢滴加147.08mg(1.63mmol)丙烯酰氯和5ml 1,4-二氧六环的混合溶液,控制温度在0~10℃,滴加完毕后继续搅拌10min,之后将温度升至室温,向体系中加入4ml 4N盐酸水溶液,搅拌10h反应完毕后用碳酸氢钠饱和水溶液调pH 7~9,用20ml二氯甲烷萃取,饱和食盐水洗涤有机层,干燥,抽滤,减压旋蒸掉二氯甲烷,得到泡沫状灰白固体384.5mg,收率89%。1H NMR(CDCl3-d6,400MHz),2.29(br s,8H),2.67(s,1H),2.89(t,2H,J=4.0Hz,-CH2-),3.78(s,2H),3.83(s,3H),2.89(t,1H,J=16.0Hz,-CH=),6.39(d,J=2.4Hz,2H,=CH2),6.68(s,1H),7.98(s,1H),10.03(s,1H); 13CNMR(100MHz,CDCl3)δ(ppm):44.15,45.15,55.82,57.21,105.15,107.14,125.86,129.96,132.31,132.36,133.89,143.59,163.39.MS(ES+)m/e(M+)293.2。
实施例5:N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的制备方法
氮气/氩气保护下,向单口烧瓶中加入100mg(0.41mmol)3-(2-氯嘧啶-4-基)-1-甲基吲哚,125.98mg(0.43mmol)2-甲氧基-4-N,N,N’-三甲基乙二胺基-5-丙烯酰胺基苯胺,76.32mg(0.44mmol)对甲苯磺酸和5ml异丁醇,反应温度在55℃,搅拌反应5h,有固体析出,降至室温后抽滤,收集滤饼,将滤饼溶于30ml水,用饱和碳酸氢钠水溶液调至中性,用10ml二氯甲烷萃取两次,合并有机层,干燥,抽滤,减压旋蒸掉二氯甲烷得到淡黄色固体190.5mg,收率93%。1H NMR(CDCl3-d6,400MHz),2.30(br s,8H),2.72(s,1H),2.92(t,2H,J=5.2Hz),3.90(s,3H),4.02(s,3H),5.73(t,1H,J=6.0Hz),6.47(d,2H,J=14.0Hz),6.81(s,1H),7.22(d,2H,J=5.2Hz),7.27-7.32(m,2H),7.41-7.43(m,1H),7.75(s,1H),8.08(d,1H,J=8.8Hz),,8.40(d,1H,J=5.2Hz),9.12(s,1H),9.87(s,1H),10.19(s,1H)。MS(ES+)m/e(M+)500.3。
Claims (9)
1.一种抗肿瘤药物N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,其特征在于包括如下步骤:
(1)4-氟-2-甲氧基-5-硝基苯胺经Boc酸酐保护后得到4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯;
(2)步骤(1)所得到的4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯与N,N,N’-三甲基乙二胺反应得到化合物4-(N,N,N’-三甲基乙二胺基)-2-甲氧基-5-硝基苯胺基甲酸叔丁酯;
(3)步骤(2)所得到的4-(N,N,N’-三甲基乙二胺基)-2-甲氧基-5-硝基苯胺基甲酸叔丁酯经还原反应得到化合物2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺;
(4)步骤(3)所得到的2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺与丙烯酰氯反应后脱Boc保护基得到化合物2-甲氧基-4- N,N,N’-三甲基乙二胺基-5-丙烯酰胺基苯胺;
(5)步骤(4)所得到的2-甲氧基-4- N,N,N’-三甲基乙二胺基-5-丙烯酰胺基苯胺与3-(2-氯嘧啶-4-基)-1-甲基吲哚反应得到N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺。
2.根据权利要求1所述N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,其特征在于步骤(1)使用催化剂催化反应的进行,所述催化剂为4-二甲氨基吡啶或吡啶。
3.根据权利要求1所述N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,其特征在于步骤(1)中反应溶剂为二氯甲烷、乙腈、1,2-二氯乙烷、甲苯中的一种或几种。
4.根据权利要求1所述N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,其特征在于步骤(2)中4-氟-2-甲氧基-5-硝基苯胺基甲酸叔丁酯与N,N,N’-三甲基乙二胺在碱性条件下进行反应。
5.根据权利要求1所述N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,其特征在于步骤(2)中反应溶剂为N,N-二甲基甲酰胺、二甲基亚砜、N,N-二甲基乙酰胺、六甲基磷酰三胺、1,3-二甲基-2-咪唑啉酮中的一种或几种。
6.根据权利要求1所述N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,其特征在于步骤(3)中所述还原反应为使用钯碳催化加氢还原,所述钯碳的用量为4-(N,N,N’-三甲基乙二胺基)-2-甲氧基-5-硝基苯胺基甲酸叔丁酯重量的2%~10%。
7.根据权利要求1所述N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,其特征在于步骤(4)中2-(N,N,N’-三甲基乙二胺基)-4-甲氧基-5-氨基甲酸叔丁酯苯胺与丙烯酰氯反应是在溶剂四氢呋喃、1,4-二氧六环、2-甲基呋喃、1,3-二氧戊烷中的一种或几种中进行,脱Boc保护基是在酸性条件下进行。
8.根据权利要求1所述N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,其特征在于步骤(5)使用催化剂催化反应,所述催化剂为对甲苯磺酸、对甲苯磺酸一水合物或者甲磺酸。
9.根据权利要求1所述N-[2-[[2-(二甲基氨基)乙基]甲基氨基]-4-甲氧基-5-[[4-(1-甲基-1H-吲哚-3-基)-2-嘧啶基]氨基]苯基]-2-丙烯酰胺的合成方法,其特征在于步骤(5)的反应溶剂为2-戊醇、正丁醇、异丁醇中的一种或几种。
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