CN103724253B - 一种米格列奈钙的制备方法 - Google Patents
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- C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
- C07D209/44—Iso-indoles; Hydrogenated iso-indoles
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- Organic Chemistry (AREA)
- Indole Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
本发明提供了一种米格列奈钙的新制备方法,该方法包括:以顺-六氢异吲哚为原料,经酰化反应、烃化反应、水解反应和成盐反应,制得米格列奈钙。所述烃化反应和水解反应采用“一勺烩”的方法完成,产品纯度达到99.8%以上,收率36%以上。本发明所述的制备方法具有原料易得,反应条件温和,操作简单易行,收率较高,具有较高工业生产价值,目前已实现产业化。
Description
技术领域
本发明涉及医药领域,具体而言,本发明涉及一种米格列奈钙的制备方法。
背景技术
双〔(2s)-2-苄基-3-(顺-六氢异吲哚-2-羰基)丙酸〕单钙二水合物(米格列奈钙),分子式为C38H48CaN2O6·2H2O,英文名为MitiglinideCalciumHydrate,结构式(I)如下:
米格列奈钙是由日本橘生药品工业株式会社合成,2004年4月在日本上市,用于经饮食和运动疗法不能有效控制高血糖的Ⅱ型糖尿病病人。米格列奈钙是继瑞格列奈、那格列奈后第三个美格列脲类药物,属于苯丙氨酸的衍生物。米格列奈钙通过关闭胰腺β细胞膜上的ATP依赖性K通道,造成Ca内流,使细胞内Ca浓度增加而使细胞外含胰岛素的囊泡脱粒,从而刺激胰岛素的分泌。并且只是在进餐时才会迅速而短暂的刺激胰腺分泌胰岛素,与传统的磺酰脲类药物相比起效迅速而作用时间短,抑制Ⅱ型糖尿病特征性的餐后高血糖,避免了低血糖反应的发生,是早期及轻度糖尿病患者的一线治疗药物,且耐受性好。
根据文献和专利报道,米格列奈钙的制备主要有以下几种方法。
方法一:以2-(S)-苄基丁二酸为原料,经酰胺化、还原、成盐得到米格列奈钙此方法虽然步骤较少,但原料为手性化合物,价格昂贵,使生产成本较高,不适于工业化生产。【参考文献:SorberaLA,LeesonPA,CastanerRM,etal.Mitiglinidecalcium(KAD-1229)[J].DrugsFuture,2000,25(10):1034-1042.
方法二:丁二酸二甲酯与苯甲醛为原料,经Stobble缩合、水解、脱水成酸酐,与顺-全氢异吲哚缩合后还原得到消旋酸,再经拆分、成盐等得米格列奈钙。此法操作相对复杂,缩合反应时杂质多,产物难以分离提纯,成本较高,且手性拆分时收率较低。【参考文献:郑德强,刘文涛,毋立华等.米格列奈钙的合成[J].食品与药品,2007,9(11):13-15.】
方法三:丁二酸二甲酯与苯甲醛为原料,经Stobbe缩合、还原、拆分,用对硝基苯酚和二环己基碳二亚胺活化,成盐得到米格列奈钙,此生产成本比较高,而且用到柱层析,不适于工业化生产。【参考文献:张红梅,陈立功,曹小辉.米格列奈的合成工艺研究[J],现代化工,2008,28(8):56-59.】
随着社会经济的发展和人们生活水平的不断提高,糖尿病患病率正在急剧增加,已成为影响人类身体健康的主要疾病之一。米格列奈钙作为优秀的速效降糖药,虽然合成路线报道较多,但多不适合工业化生产,寻找一条经济有效的方法制备方法,具有重要意义。
发明内容
本发明的目的是提供一种适于工业化生产的米格列奈钙的制备方法。
为了实现本发明的目的,本发明提供了一种米格列奈钙的制备方法,如下所示,该方法包括如下步骤:
米格列奈钙的合成工艺路线
1)以顺-六氢异吲哚为原料依次进行酰化反应、烃化反应、水解反应来制备米格列奈,所述烃化反应、水解反应通过“一勺烩”的方法来制备;
2)通过成盐反应由所述步骤1)中制得的米格列奈来制备米格列奈钙。
目前,米格列奈钙通常是依次通过缩合、水解、脱水成酸酐,与顺-全氢异吲哚缩合后还原得到消旋酸,再经拆分、成盐等制得米格列奈钙,本发明人发现,在米格列奈钙制备过程中,烃化反应和水解反应可通过“一锅法”来制备,无需分离中间产物。在本领域中,术语“一锅法”(one-potprocess,俗称“一勺烩法”)是指将多步反应简化到一起依次进行,中间无需分离中间产物。具体到本发明是指烃化反应、水解反应依次进行,而无需分离中间产物,这样就大大简化了操作条件和过程,提高了产品收率和质量,降低了成本。
本发明中:以顺-六氢异吲哚为原料,经与氯乙酰氯反应得顺-N-氯乙酰基六氢异吲哚,然后与N-苯丙酰基樟脑磺内酰胺进行烃化反应,所得产物经水解、成盐得目标产物。
本发明的酰化反应中,反应温度为0-30℃,反应时间为1-6小时。
所述的烃化反应采用N-苯丙酰基樟脑磺内酰胺作为手性诱导基团,所用溶剂以极性非质子溶剂如N,N-二甲基甲酰胺、四氢呋喃、二甲基亚砜,反应温度为25-100℃,反应时间10-24小时,投料比为顺-N-氯乙酰基六氢异吲哚:N-苯丙酰基樟脑磺内酰胺=1:1~2为最佳。
所述的水解反应温度20-50℃,反应时间10-20小时。
所述成盐反应是通过由制得的米格列奈和氯化钙反应来进行的,成盐时反应温度为20-45℃,反应时间为0.5-3小时。
与现有技术相比本发明有如下优点:
1、采用顺-六氢异吲哚为原料,经与氯乙酰氯反应得顺-N-氯乙酰基六氢异吲哚,然后与N-苯丙酰基樟脑磺内酰胺进行烃化反应,所得产物经水解、成盐得目标产物,该合成路线具有原料易得,反应条件温和,操作简单易行,收率较高,具有较高工业生产价值。
2、采用樟脑磺内酰胺作为手性诱导基团,立体选择性地进行烃化反应,从而实现手性合成。
3、采用“一勺烩”的方法,简化了操作,提高了收率,四步反应总收率达到36%。
具体实施方式
下面的实施例将对本发明予以进一步的说明,但并不因此而限制本发明。
实施例1:
将顺-六氢异喹啉(250.4g,2mol),无水碳酸钾(304.0g,2.2mol),二氯甲烷(1000ml)加入到反应瓶中,保持温0-5℃,剧烈搅拌下,滴加氯乙酰氯(271.0g,2.4mol)的二氯甲烷(500ml)溶液,滴毕,室温反应2.5h,点板监测,反应毕,补加水1000ml,分出有机层,水洗(1000ml),饱和食盐水(1000ml)洗,无水硫酸钠干燥过夜,减压蒸出二氯甲烷,得顺-N-氯乙酰基六氢异吲哚(2)357.4g油状物,收率:88.6%。
将顺-N-氯乙酰基六氢异吲哚(302.5g,1.5mol),N-苯丙酰基樟脑磺内酰胺(573.0g,1.65mol),70%氢化钠(56.6g,1.65mol),N,N-二甲基甲酰胺(900ml)加入到反应瓶中,在50℃下,剧烈搅拌反应12h,得到烃化产物,放置至室温备用。
向上述体系中缓慢滴加水100ml,滴毕,加入氢氧化锂(39.5g,1.65mol),四氢呋喃(600ml),在0-5℃下滴加30%过氧化氢溶液680ml,滴毕,转移至室温下继续反应18h,点板监测,反应毕,补加水1200ml,调pH至2-3左右,用二氯甲烷(900ml×3)提取,合并有机相,饱和食盐水(1500ml)洗,无水硫酸钠干燥过夜,减压蒸出溶剂得粘稠状液体,向其中加入乙酸乙酯250ml,室温搅拌,抽滤,滤饼用乙酸乙酯(150ml)洗涤,干燥,得(2s)-2-苄基-3-(顺-六氢异吲哚-2-羰基)-丙酸(6),得白色固体231.8g,两步收率:49%。将化合物6(230g,0.73mol)、水1150ml,加入到反应瓶中,全溶后,加入2mol/L氢氧化钠溶液400ml,室温搅拌30min,剧烈搅拌下缓慢滴加氯化钙(162.0g,1.46mol)的水(320ml)溶液,滴毕,继续反应1.5h,抽滤,水(200ml×2)洗滤饼,得白色固体,60℃下减压干燥3h,滤饼用95%乙醇(2300ml)重结晶,得米格列奈钙(Ⅰ)430g,收率:83.6%,m.p.:178~183℃,FAB-MS:m/z316[M+1]+;[α]D 20=+5.45°(C=1,甲醇)[文献:m.p.:179~185℃,[α]D 20=+5.64°(C=1.0,甲醇)];纯度:99.8%[HPLC归一化法:色谱柱C18,流动相1.00mol/L磷酸二氢钾缓冲盐-乙腈—水(20∶35∶30)(调节pH=2.10);检测波长210nm];1H-NMR(CDCl3,400M),δ:1.1~1.5(16H,m),1.8~2.4(6H,m),2.5~3.1(14H,m)3.3~3.8(6H,m)7.4~7.6(10H,m);元素分析(%):C64.68,H7.35,N3.94,理论值:C64.75,H7.44,N3.97.收率:36.05%,纯度99.8%。
与文献方法(见下表)相比,本发明的收率有了大幅度的提高,且终产品纯度达到了99.8%
方法 | 方法一 | 方法二 | 方法三 | 实施例1 |
总收率 | 6.26% | 9.50% | 9.26% | 36.05% |
Claims (1)
1.一种米格列奈钙的制备方法,其特征在于:将顺-六氢异喹啉250.4g,无水碳酸钾304.0g,二氯甲烷1000ml加入到反应瓶中,保持温度0-5℃,剧烈搅拌下,滴加271.0g氯乙酰氯的二氯甲烷500ml溶液,滴毕,室温反应2.5h,点板监测,反应毕,补加水1000ml,分出有机层,1000ml水洗,1000ml饱和食盐水洗,无水硫酸钠干燥过夜,减压蒸出二氯甲烷,得顺-N-氯乙酰基六氢异吲哚357.4g油状物;
将顺-N-氯乙酰基六氢异吲哚302.5g,N-苯丙酰基樟脑磺内酰胺573.0g,70%氢化钠56.6g,N,N-二甲基甲酰胺900ml加入到反应瓶中,在50℃下,剧烈搅拌反应12h,得到烃化产物,放置至室温备用;
向上述体系中缓慢滴加水100ml,滴毕,加入氢氧化锂39.5g,四氢呋喃600ml,在0-5℃下滴加30%过氧化氢溶液680ml,滴毕,转移至室温下继续反应18h,点板监测,反应毕,补加水1200ml,调pH至2-3左右,用二氯甲烷900ml×3提取,合并有机相,饱和食盐水1500ml洗,无水硫酸钠干燥过夜,减压蒸出溶剂得粘稠状液体,向其中加入乙酸乙酯250ml,室温搅拌,抽滤,滤饼用乙酸乙酯150ml洗涤,干燥,得(2s)-2-苄基-3-(顺-六氢异吲哚-2-羰基)-丙酸,得白色固体231.8g;
将(2s)-2-苄基-3-(顺-六氢异吲哚-2-羰基)-丙酸230g,水1150ml,加入到反应瓶中,全溶后,加入2mol/L氢氧化钠溶液400ml,室温搅拌30min,剧烈搅拌下缓慢滴加162.0g氯化钙的水320ml溶液,滴毕,继续反应1.5h,抽滤,水200ml×2洗滤饼,得白色固体,60℃下减压干燥3h,滤饼用95%乙醇2300ml重结晶,得米格列奈钙430g。
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CN1616427A (zh) * | 2003-11-13 | 2005-05-18 | 中国科学院上海药物研究所 | 一种制备抗糖尿病药物米格列奈的新方法 |
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WO2009047797A2 (en) * | 2007-10-08 | 2009-04-16 | Ind-Swift Laboratories Limited | Process for the preparation of perhydroisoindole derivative |
CN101492411A (zh) * | 2008-01-22 | 2009-07-29 | 北京华禧联合科技发展有限公司 | 一种改进的制备米格列奈的方法 |
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CN101492411A (zh) * | 2008-01-22 | 2009-07-29 | 北京华禧联合科技发展有限公司 | 一种改进的制备米格列奈的方法 |
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