CN110015972B - 一种碘普罗胺中间体的制备方法 - Google Patents
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- DGAIEPBNLOQYER-UHFFFAOYSA-N iopromide Chemical compound COCC(=O)NC1=C(I)C(C(=O)NCC(O)CO)=C(I)C(C(=O)N(C)CC(O)CO)=C1I DGAIEPBNLOQYER-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229960002603 iopromide Drugs 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- -1 2, 3-dihydroxypropylamino Chemical group 0.000 claims abstract description 25
- URNNVACKJFTYLF-UHFFFAOYSA-N 3-amino-2,4,6-triiodo-5-methoxycarbonylbenzoic acid Chemical compound NC=1C(=C(C(=O)O)C(=C(C1I)C(=O)OC)I)I URNNVACKJFTYLF-UHFFFAOYSA-N 0.000 claims abstract description 9
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- 150000001875 compounds Chemical class 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 20
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 18
- SKVAMSFQUUXELW-UHFFFAOYSA-N NC=1C(=C(C(=O)Cl)C(=C(C=1I)C(=O)OC)I)I Chemical compound NC=1C(=C(C(=O)Cl)C(=C(C=1I)C(=O)OC)I)I SKVAMSFQUUXELW-UHFFFAOYSA-N 0.000 claims description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- 150000001412 amines Chemical class 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 3
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- 238000005660 chlorination reaction Methods 0.000 claims description 2
- 239000003880 polar aprotic solvent Substances 0.000 claims description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 2
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- 239000003513 alkali Substances 0.000 claims 1
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- 239000007787 solid Substances 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 6
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 150000001263 acyl chlorides Chemical class 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 5
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- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 4
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- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000005457 ice water Substances 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 238000002583 angiography Methods 0.000 description 3
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- FBJVWRITWDYUAC-UHFFFAOYSA-N 5-amino-2,4,6-triiodobenzene-1,3-dicarbonyl chloride Chemical compound NC1=C(I)C(C(Cl)=O)=C(I)C(C(Cl)=O)=C1I FBJVWRITWDYUAC-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 238000002330 electrospray ionisation mass spectrometry Methods 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
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- 238000001953 recrystallisation Methods 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- 238000001308 synthesis method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- 238000005915 ammonolysis reaction Methods 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 229960001701 chloroform Drugs 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
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- 230000008025 crystallization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/14—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
- C07C227/18—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions involving amino or carboxyl groups, e.g. hydrolysis of esters or amides, by formation of halides, salts or esters
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Abstract
本发明涉及一种碘普罗胺中间体3‑[(2,3‑二羟丙胺基)甲酰基]‑2,4,6‑三碘‑5‑[(甲氧基乙酰基)氨基)]‑苯甲酸甲酯的制备方法。以5‑氨基‑2,4,6‑三碘异酞酸单甲酯为原料经氯化,制得苯甲酰氯,用甲氧基乙酰氯酰化,再与3‑氨基丙二醇进行氨解反应得到碘普罗胺中间体。本发明提供的碘普罗胺中间体制备方法具有选择性高,副产物少,产品纯度高,收率高,操作简便,适合工业化生产等优点。
Description
技术领域
本发明涉及化学合成技术领域,具体涉及一种碘普罗胺中间体5-甲氧基乙酰氨基-2,4,6-三碘异酞酸(2,3-二羟基丙基)酰胺甲酯的制备方法。
背景技术
碘普罗胺(式1),化学名称:N,N′-双(2,3-二羟丙基)-2,4,6-三碘-5-[(甲氧基乙酰基)氨基)]-N-甲基-1,3-苯二甲酰胺,一种新型第二代非离子型低渗性X射线造影剂,是由德国先灵AG公司研发,商品名Ultravist(优维显),于1985年正式推向市场,具有毒性低、性质稳定、等渗、耐受性好等优点,广泛应用于用于血管内和体腔内。常用于脑血管造影、CT增强扫描、数字减影血管造影、尿路造影及各种体腔造影。
对于碘普罗胺的合成,目前有多种合成方法,其中以美国专利US4364921报道的以5-氨基-2,4,6-三碘异酞酰氯为起始原料的合成方法,因合成路线步骤短,被认为是经济的工业生产路线,工艺路线如下:
由于式3化合物为二元对称酰氯,两个酰氯的活性相当,很容易生成双取代副产物式5化合物,此化合物与碘普罗胺结构非常相似,如不在前面除去此副产物,在后续纯化过程中更难去除。从主产物式3中分离副产物式5较难,需使用大量溶剂反复结晶,操作步骤繁琐,收率低。
为了减少双取代副产物产生,中国专利106699594A采用活性较低的5-氨基-2,4,6-三碘异酞酸甲酯(式7)来代替5-氨基-2,4,6-三碘异酞酰氯,合成路线如下:
尽管式7化合物中酯官能团的活性低于其他路线中酰氯基团,提高此步氨解反应的选择性,但由于酯的对称结构,也不能完全避免两个酯基同时参与反应产生副产物。为了提高碘普罗胺的总合成收率,关键是要提高式I化合物合成收率,提高选择性。因此需要开发一种选择性高,重现性好,高收率,高纯度的制备碘普罗胺中间体式I化合物的方法。
发明内容
为了解决上述的技术问题,本发明提供了一种成本低,重现性好,高收率、高纯度,简便的制备碘普罗胺中间体式I化合物的方法。
本发明通过下述的技术方案类实现的:
本发明的碘普罗胺中间体的制备方法是以5-氨基-2,4,6-三碘异酞酸单甲酯为原料,在一定条件下经三步反应,从而制得碘普罗胺中间体式I化合物。
本发明的碘普罗胺中间体式I化合物的制备方法,反应式如下:
所述碘普罗胺中间体式I化合物的制备方法包括下述的步骤:
(S1)以5-氨基-2,4,6-三碘异酞酸单甲酯(式II)为原料,经氯化制得3-氨基-5-氯甲酰基-2,4,6-三碘苯甲酸甲酯(式III);
(S2)3-氨基-5-氯甲酰基-2,4,6-三碘苯甲酸甲酯(式III)与甲氧基乙酰氯反应制得3-氯甲酰基-2,4,6-三碘-5-[(甲氧基乙酰基)氨基)]-苯甲酸甲酯(式IV)
(S3)3-氯甲酰基-2,4,6-三碘-5-[(甲氧基乙酰基)氨基)]-苯甲酸甲酯(式IV)与3-氨基丙二醇反应制得3-[(2,3-二羟基丙胺基甲酰基)-2,4,6-三碘-5-[(甲氧基乙酰基)氨基]-苯甲酸甲酯(式I)。
上述的碘普罗胺中间体式I化合物的制备方法中,所述步骤(S1)中,5-氨基-2,4,6-三碘异酞酸单甲酯(式II)与氯化亚砜在无溶剂或在二氯甲烷、三氯甲烷中回流反应制得3-氨基-5-氯甲酰基-2,4,6-三碘苯甲酸甲酯(式III)。
上述的碘普罗胺中间体式I化合物的制备方法中,所述步骤(S2)中,3-氨基-5-氯甲酰基-2,4,6-三碘苯-甲酸甲酯(式III)与甲氧基乙酰氯,在极性非质子溶剂中反应制得3-氯甲酰基-2,4,6-三碘-5-(2-甲氧基乙酰氨基)-苯甲酸甲酯(式IV)。
上述的碘普罗胺中间体式I化合物的制备方法中,所述步骤(S3)中,3-氯甲酰基-2,4,6-三碘-5-(2-甲氧基-乙酰氨基)-苯甲酸甲酯与3-氨基丙二醇在碱催化剂作用下,反应制得3-(2,3-二羟基丙胺基甲酰基)-2,4,6-三碘-5-(2-甲氧基乙酰氨基)-苯甲酸甲酯(式I)。
上述的碘普罗胺中间体式I化合物的制备方法中,所述步骤(S3)中,碱催化剂为有机胺如三乙胺、三正胺,无机碱碳酸钠、碳酸钾,碱催化剂与(式IV)化合物摩尔比为1~1.5。
本发明优点:利用酰氯、酯与有机胺反应活性不一样,酰氯优先与3-氨基丙二醇反应,高选择性,高纯度制备碘普罗胺中间体式I化合物,产品纯度高,操作简便,总收率高。
具体实施方式
下面结合具体实施例对本发明作更进一步的说明,以便本领域的技术人员更了解本发明,但不因此限制本发明。
实施例1
(S1)3-氨基-5-氯甲酰基-2,4,6-三碘苯甲酸甲酯(式III)的制备
向反应瓶中,加入5-氨基-2,4,6-三碘异酞酸单甲酯(式II)30.0g,二氯甲烷120ml,氯化亚砜15ml,加热至回流反应3.5h,TLC检测反应完全(展开剂:石油醚/乙酸乙酯=3/2)。减压蒸馏至干,加入500ml二氯甲烷和80ml冰水,搅拌溶解,静止分层,有机层分别用80ml5%碳酸氢钠水溶液和80ml去离子水洗涤,浓缩得到29.8g黄色固体。收率96.2%。
1H NMR(400MHz,CDCl3)δ:5.15(s,2H),3.99(s,3H)。
(S2)3-氯甲酰基-2,4,6-三碘-5-[(甲氧基乙酰基)氨基)]-苯甲酸甲酯(式IV)的制备
向反应瓶中,加入式III化合物25.0g,N,N二甲基甲酰胺100ml,甲氧基乙酰氯6.0g,于室温下,搅拌反应8h,TLC检测反应完全,倒入1000ml冰水中,搅拌析出固体,过滤,水洗,真空干燥得到26.9g白色固体。收率95.9%。
1H NMR(400MHz,CDCl3)δ:8.14(s,1H),4.05(s,2H),3.93(s,3H),3.53(s,3H)。
ESI-MS(m/z):680.7655[M+NH4]+。
(S3)3-[(2,3-二羟基丙胺基甲酰基)-2,4,6-三碘-5-[(甲氧基乙酰基)氨基]-苯甲酸甲酯(式I)的制备
向反应瓶中,加入式IV化合物20.0g,3-氨基丙二醇3.0g,三乙胺4.6ml,1,4-二氧六环200ml,于室温下搅拌反应10h,TLC检测反应完全(展开剂:二氯甲烷/甲醇=5/1),过滤,滤液减压蒸馏至干,向残余物中加入去离子水200ml,搅拌析出白色固体。过滤,用甲醇重结晶得到20.6g白色固体。收率为95.2%,用HPLC分析纯度为99.3%。
异构体1:1H NMR(400MHz,DMSO)δ:10.13(s,1H),8.56(t,J=5.6Hz,1H),4.71(s,1H),4.50(s,1H),4.02(s,2H),3.88(s,3H),3.69(d,J=3.9Hz,1H),3.46(s,3H),3.49-3.44(m,2H),3.32-3.26(m,2H)。
异构体2:1H NMR(400MHz,DMSO)δ:10.01(s,1H),8.64(dd,J=8.8,5.4Hz,1H),4.71(s,1H),4.50(s,1H),4.01(s,2H),3.88(s,3H),3.69(d,J=3.9Hz,1H),3.47(s,3H),3.40-3.37(m,2H),3.15(m,2H)。
ESI-MS(m/z):718.8243[M+H]+。
实施例2
(S1)3-氨基-5-氯甲酰基-2,4,6-三碘苯甲酸甲酯(式III)的制备
向反应瓶中,加入5-氨基-2,4,6-三碘异酞酸单甲酯30.0g(式II),氯化亚砜60ml,加热至回流反应2h,TLC检测反应完全。减压蒸馏至干,加入500ml二氯甲烷和80ml冰水,搅拌溶解,静止分层,有机层分别用80ml 5%碳酸氢钠水溶液和80ml去离子水洗涤,浓缩得到28.5g黄色固体。收率92.0%。
(S2)3-氯甲酰基-2,4,6-三碘-5-[(甲氧基乙酰基)氨基)]-苯甲酸甲酯(式IV)的制备
向反应瓶中,加入式III化合物25.0g,N,N二甲基乙酰胺100ml,甲氧基乙酰氯5.3g,于室温下,搅拌反应8h,TLC检测反应完全,倒入1000ml冰水中,搅拌析出固体,过滤,水洗,真空干燥得到26.6g白色固体。收率94.8%。
(S3)3-[(2,3-二羟基丙胺基甲酰基)-2,4,6-三碘-5-[(甲氧基乙酰基)氨基]-苯甲酸甲酯(式I)的制备
向反应瓶中,加入式IV化合物20.0g,3-氨基丙二醇3.3g,碳酸钠3.8g,DMF100ml,于室温下搅拌反应9h,TLC检测反应完全,过滤,滤液减压蒸馏至干,向残余物中加入去离子水200ml,搅拌析出白色固体。过滤,用甲醇重结晶得到20.2g白色固体。收率为93.3%,用HPLC分析纯度为99.6%。
Claims (2)
1.一种碘普罗胺中间体3-[(2,3-二羟丙胺基)甲酰基]-2,4,6-三碘-5-[(甲氧基乙酰基)氨基)]-苯甲酸甲酯的制备方法,其特征在于,反应式如下:
基于上述反应式的碘普罗胺中间体的制备方法包括下述的步骤:
步骤S1:以式II所示的5-氨基-2,4,6-三碘异酞酸单甲酯为原料,经氯化制得式III所示的3-氨基-5-氯甲酰基-2,4,6-三碘苯甲酸甲酯;
步骤S2:3-氨基-5-氯甲酰基-2,4,6-三碘苯甲酸甲酯与甲氧基乙酰氯反应制得式IV所示的3-氯甲酰基-2,4,6-三碘-5-[(甲氧基乙酰基)氨基)]-苯甲酸甲酯;
步骤S3:3-氯甲酰基-2,4,6-三碘-5-[(甲氧基乙酰基)氨基)]-苯甲酸甲酯与3-氨基丙二醇反应制得式I所示的3-[(2,3-二羟基丙胺基甲酰基)-2,4,6-三碘-5-[(甲氧基乙酰基)氨基]-苯甲酸甲酯;
其中,步骤S2中,3-氨基-5-氯甲酰基-2,4,6-三碘苯甲酸甲酯与甲氧基乙酰氯,在极性非质子溶剂中反应制得3-氯甲酰基-2,4,6-三碘-5-(2-甲氧基乙酰氨基)-苯甲酸甲酯;
步骤S3中,3-氯甲酰基-2,4,6-三碘-5-(2-甲氧基-乙酰氨基)-苯甲酸甲酯与3-氨基丙二醇在碱催化剂作用下,反应制得3-(2,3-二羟基丙胺基甲酰基)-2,4,6-三碘-5-(2-甲氧基乙酰氨基)-苯甲酸甲酯;
碱催化剂为有机胺和无机碱,有机胺包括三乙胺和三正胺,无机碱包括碳酸钠和碳酸钾,碱催化剂与式IV化合物的摩尔比为1~1.5。
2.根据权利要求1所述碘普罗胺中间体3-[(2,3-二羟丙胺基)甲酰基]-2,4,6-三碘-5-[(甲氧基乙酰基)氨基)]-苯甲酸甲酯的制备方法,其特征在于,步骤S1中,5-氨基-2,4,6-三碘异酞酸单甲酯与氯化亚砜在无溶剂或在二氯甲烷、三氯甲烷中回流反应制得3-氨基-5-氯甲酰基-2,4,6-三碘- 苯甲酸甲酯。
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