CN114716405A - 一种芳香性苯并[c]菲啶类生物碱中间体化合物的制备方法及用途 - Google Patents
一种芳香性苯并[c]菲啶类生物碱中间体化合物的制备方法及用途 Download PDFInfo
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- CN114716405A CN114716405A CN202210217787.1A CN202210217787A CN114716405A CN 114716405 A CN114716405 A CN 114716405A CN 202210217787 A CN202210217787 A CN 202210217787A CN 114716405 A CN114716405 A CN 114716405A
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- C07D317/00—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
- C07D317/08—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
- C07D317/44—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D317/70—Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with ring systems containing two or more relevant rings
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
- C07D491/02—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains two hetero rings
- C07D491/04—Ortho-condensed systems
- C07D491/056—Ortho-condensed systems with two or more oxygen atoms as ring hetero atoms in the oxygen-containing ring
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
- C07D491/12—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains three hetero rings
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- C07D491/153—Ortho-condensed systems the condensed system containing two rings with oxygen as ring hetero atom and one ring with nitrogen as ring hetero atom
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- 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
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- 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
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- 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
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
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Abstract
本发明涉及医药合成领域,公开了一种芳香性苯并[c]菲啶类生物碱中间体化合物的制备方法及用途。本发明方法以1,2‑亚甲二氧基苯(胡椒环)为起始原料,替代管制类化合物胡椒醛来合成芳香性苯并[c]菲啶类生物碱中间体化合物,具有原料易得、步骤短、反应条件温和、生产成本低、环保、收率高、纯度高的优点,可满足药用产品的高质量要求。
Description
技术领域
本发明涉及医药合成领域,尤其涉及一种芳香性苯并[c]菲啶类生物碱中间体化合物的制备方法及用途。
背景技术
芳香性苯并[c]菲啶类生物碱是许多中药中的生物碱成分,具有抗病毒、抗疟疾、抗真菌和抗肿瘤等作用,被广泛关注和研究。例如血根碱(sanguinarine,SA)、白屈菜红碱(chelerythrine,CHE)、氯化两面针碱(Nitidine Chloride,NC)等。
苯并[c]菲啶骨架主要由菲啶环(A、B、C环)和1个苯环(D环)组成,合成方法可通过构筑环的顺序来分类,即根据哪个环的形成是构筑该结构的最后一步对合成方法进行分类。根据现有文献,在最后一步构筑B环或C环是这类化合物合成中最常用的方法。
6,7-亚甲基二氧基-1-萘胺(化合物I)是构建血根碱、白屈菜红碱、氯化两面针碱等苯并[c] 菲啶骨架B环的关键中间体。
化合物I
中间体化合物I可由胡椒醛(化合物A1)为起始原料,经Wittg烯化(3-溴丙酸三苯基膦盐在THF/DMSO溶剂体系中,NaH引发,20h;盐酸淬灭,乙酸乙酯萃取)、催化氢化(0.2eqPd/C,甲醇溶剂,硅藻土过滤后真空浓缩)、F-C酰化(PPA,二氯甲烷溶剂,回流4h,饱和碳酸氢钠溶液淬灭,真空浓缩)3步反应再经柱层析后制备α-四氢萘酮中间体(中间体化合物II),收率66%;再经酮肟化、苯甲磺酰化、Semmler-Wolff芳构化3步反应再经柱层析制备,收率 50%,路线如下所示。
De,Subhadip,et al.″Expeditious approach to pyrrolophenanthridones,phenanthridines,and benzo [c]phenanthridines via organocatalytic directbiaryl-coupling promoted by potassium tert-butoxide.″The Journal of organicchemistry 78.16(2013):7823-7844 胡椒醛属于第一类中的非药品类易制毒化学品,供应受限,此难以实际应用到批量化的工业生产中。因此,有必要开发出一条原料易得、制备流程短、反应条件温和、生产成本低、环保、收率高、纯度高的替代合成路线。
发明内容
为了解决上述技术问题,本发明提供了一种芳香性苯并[c]菲啶类生物碱中间体化合物的制备方法及用途。本发明方法以1,2-亚甲二氧基苯(胡椒环)为起始原料,替代管制类化合物胡椒醛,具有原料易得、步骤短、反应条件温和、生产成本低、环保、收率高、纯度高的优点,可满足药用产品的高质量要求。
本发明的具体技术方案为:
第一方面,本发明提供了一种芳香性苯并[c]菲啶类生物碱中间体化合物的制备方法,具体包括以下步骤:
(1)以1,2-亚甲二氧基苯A2(胡椒环)为起始原料经F-C酰化得到化合物B,再经催化氢化、水解得到化合物C,最后经环合反应制备得到中间体化合物II,合成路线如下所示:
(2)所述中间体化合物II经肟化反应得到中间体化合物III,最后经芳构化反应制得中间体化合物I,即芳香性苯并[c]菲啶类生物碱中间体化合物,合成路线如下所示:
作为优选,步骤(1)中,所述F-C酰化为1,2-亚甲二氧基苯与酰化试剂、催化剂A 在反应溶剂A中于0-40℃的反应温度下进行。
进一步优选,步骤(1)中,所述酰化试剂选自丁酸酐、丁二酸单乙酯酰氯和丁二酸单甲酯酰氯等;所述催化剂A选自无水三氯化铝、三氟乙酸、无水氯化锌、PPA、三氯化铁或硅胶负载甲磺酸;所述反应溶剂A选自二氯甲烷、硝基甲烷、硝基苯和二硫化碳等中的一种或多种;所述F-C酰化的反应温度为10-30℃。
所述1,2-亚甲二氧基苯、酰化试剂和催化剂A的当量比为1∶1-1.5∶1-1.5。
作为优选,步骤(1)中,所述催化氢化为化合物B和催化剂B在反应溶剂B中于50~80℃的反应温度下进行。
进一步优选,步骤(1)中,所述催化剂B为Pd/C;所述反应溶剂B选自甲醇、乙醇和异丙醇中的一种或多种;所述催化氢化的反应温度优选为60~80℃。
作为优选,步骤(1)中,所述环合反应为化合物C与酸性催化剂C在反应溶剂C中于20-110℃的反应温度下进行。
进一步优选,步骤(1)中,所述酸性催化剂C选自多聚磷酸、硫酸、甲磺酸、三氯化铁、三氯化铝、四氯化锡、醋酸酐、三氟化硼乙醚、三氟乙酸、三氟乙酸酐和PPE中的一种或多种;所述反应溶剂C选自二氯甲烷、甲苯和氯苯中的一种或多种;所述环合反应的反应温度为20-40℃;所述化合物C和酸性催化剂C的当量比为1∶0.5-1.5。
作为优选,步骤(2)中,所述肟化反应为化合物II和肟化试剂II在反应溶剂II中于40-80℃的反应温度下进行。
进一步优选,步骤(2)中,所述肟化试剂II选自盐酸羟胺、硫酸羟胺、磷酸羟胺、醋酸钠、醋酸钾、氢氧化钠等中的一种或多种;所述反应溶剂II选自甲醇、乙醇、异丙醇等中的一种或多种;所述肟化反应的反应温度优选为50-80℃。所述化合物II和肟化试剂II的当量比为1∶0.5-2.5。
作为优选,步骤(2)中,所述芳构化反应为化合物III和催化剂III在反应溶剂III在 110-280℃的反应温度下进行。
进一步优选,步骤(2)中所述催化剂III为Pd/C;所述反应溶剂III选自乙二醇二甲醚、二乙二醇二甲醚、三乙二醇二甲醚等中的一种或多种;所述芳构化的反应温度优选为150-250℃。
第二方面,本发明将上述制备方法制得的芳香性苯并[c]菲啶类生物碱中间体化合物应用于化学合成血根碱、白屈菜红碱或氯化两面针碱。
与现有技术对比,本发明的有益效果是:
(1)本发明以1,2-亚甲二氧基苯(胡椒环)替代管制类易制毒化学品原料胡椒醛作为芳香性苯并[c]菲啶类生物碱中间体化合物合成的起始原料,具有原料易得,成本低的优势。
(2)本发明合成路线以1,2-亚甲二氧基苯A2为起始原料,先后经F-C酰化、催化氢化、水解、环合反应、肟化反应和芳构化反应制得芳香性苯并[c]菲啶类生物碱中间体化合物,具有步骤短、反应条件温和、生产成本低、环保、收率高、纯度高的优点,可满足药用产品的高质量要求。
(3)本发明合成路线环合反应步骤反应温度较传统路线更为温和,所述酸性催化剂均使用当量级,三废产生更少。
(4)本发明合成路线芳构化反应采用贵金属催化剂催化反应,较传统路线省却了肟基的保护与水解,反应更为环保。
附图说明
图1为实施例1产物的GC图谱;
图2为实施例2产物的GC图谱;
图3为实施例3产物的GC图谱;
图4为实施例4产物的GC图谱;
图5为实施例5粗品的GC图谱;
图6为实施例5产物的GC图谱。
具体实施方式
下面结合实施例对本发明作进一步的描述。
总实施例
一种芳香性苯并[c]菲啶类生物碱中间体化合物的制备方法,具体包括以下步骤:
(1)以1,2-亚甲二氧基苯A2(胡椒环)为起始原料经F-C酰化得到化合物B,再经催化氢化、水解得到化合物C,最后经环合反应制备得到中间体化合物II,合成路线如下所示:
具体地:
F-C酰化为1,2-亚甲二氧基苯与酰化试剂(优选丁酸酐、丁二酸单乙酯酰氯、丁二酸单甲酯酰氯等)、催化剂A(无水三氯化铝、三氟乙酸、无水氯化锌、PPA、三氯化铁或硅胶负载甲磺酸)在反应溶剂A(优选二氯甲烷、硝基甲烷、硝基苯等)中于0-40℃(优选20-30℃)的反应温度下进行。其中,1,2-亚甲二氧基苯、酰化试剂和催化剂A的当量比为1∶1-1.5∶1-1.5。
催化氢化为化合物B和催化剂B(Pd/C)在反应溶剂B(优选甲醇、乙醇、异丙醇等)中于50~80℃(优选为60~80℃)的反应温度下进行。
环合反应为化合物C与酸性催化剂C(优选多聚磷酸、硫酸、甲磺酸、三氯化铁、三氯化铝、四氯化锡、醋酸酐、三氟化硼乙醚、三氟乙酸、三氟乙酸酐和PPE等)在反应溶剂 C(优选二氯甲烷、甲苯和氯苯等)中于20-110℃(优选20-40℃)的反应温度下进行。其中,化合物C和酸性催化剂C的当量比1∶0.5-1.5。
(2)中间体化合物II经肟化反应得到中间体化合物III,最后经芳构化反应制得中间体化合物I,即芳香性苯并[c]菲啶类生物碱中间体化合物,合成路线如下所示:
具体地:
肟化反应为化合物II和肟化试剂II(优选盐酸羟胺、硫酸羟胺、磷酸羟胺、醋酸钠、醋酸钾、氢氧化钠等)在反应溶剂II(优选甲醇、乙醇、异丙醇等)中于40-80℃(优选50-80℃)的反应温度下进行,其中化合物II和肟化试剂II的当量比为1∶0.5-2.5。
芳构化反应为化合物III和催化剂III(Pd/C)在反应溶剂III(优选乙二醇二甲醚、二乙二醇二甲醚、三乙二醇二甲醚等)在110-280℃(优选150-250℃)的反应温度下进行。
实施例1:步骤(1)F-C酰化,制备中间体化合物B, R=Et
在2L四口瓶中加入100g胡椒环,500mL二氯甲烷,148g丁二酸单乙酯酰氯,降温至10℃,分批加入无水三氯化铁146g,GC跟踪至原料反应完毕,向反应瓶中加入110g盐酸水溶液,低温搅拌1h,再加入1L水,升温至25℃搅拌2h,分层,水相用二氯甲烷萃取,合并有机相,减压蒸馏后得到棕色粘稠状液体210.8g,GC纯度87.96%(如图1所示),粗收率102.8%,直接用于下一步反应。
实施例2:步骤(2)催化氢化、水解,制备中间体化合物C,R=H
向2L高压釜中加入第一步所制备的化合物B 210.8g,1000ml乙醇,10.5g 5%Pd/C,关闭高压釜,通排氢气5次,加热至75℃保温反应24h,GC跟踪至原料反应完毕,过滤催化剂,滤液旋蒸除去一部分乙醇,反应液加入500mL水,滴加300g 20%氢氧化钠水溶液,加热至50℃搅拌2h,GC跟踪至水解完成(R由Et水解为H),减压蒸馏除去大部分乙醇,二氯甲烷萃取剩余水相,水相冰水下滴加盐酸调PH至1左右,析出大量固体,过滤得到化合物C 154g,GC纯度99.39%(如图2所示),第一步与第二步总收率90.3%。
实施例3:步骤(1)环合反应制备中间体化合物II
向5L四口瓶中加入500g化合物C(R=H),2500mL二氯甲烷,滴加356g三氟化硼乙醚溶液,再滴加343g乙酸酐,滴毕后室温搅拌2h,GC跟踪至原料转化完毕,加入1000ml水继续搅拌5h,旋蒸除去大部分二氯甲烷,旋蒸底物溶于3000ml乙酸乙酯中,分别用水、1mol/L氢氧化钠水溶液、水洗涤乙酸乙酯,最后干燥后,旋蒸除去乙酸乙酯,得到化合物II 400g,GC纯度98.67%(如图3所示),收率87.6%。
步骤(1)由胡椒环制备化合物II,合并收率79.1%。
实施例4:步骤(2)肟化制备化合物III
向2L四口瓶中加入100g化合物II,甲醇1000mL,醋酸钠86g,盐酸羟胺55g,开搅拌,加热至70℃反应,GC跟踪至原料转化完毕,旋蒸除去乙醇,旋蒸底物加入500mL水中加热至60℃搅拌2h,冷却至室温,过滤得到化合物III 102g,GC纯度94%(如图4所示),收率94.5%。
实施例5:步骤(2)芳构化制备化合物I
在250mL四口瓶中加入5g化合物III,50mL三乙二醇二甲醚,1g10%Pd/C,2g碳酸氢钠,将反应液搅拌加热至230℃反应,GC跟踪至原料转化完毕。冷却至室温,过滤,滤液加入300mL 冰水中,过滤烘干得到粗品4.3g,GC纯度94.7%(如图5所示)。
将粗品加入100mL甲醇中,再加入0.2g活性炭,加热溶清后过滤,滤液冷却至室温,过滤得到黄色晶体3.2g,GC纯度99.15%(如图6所示),收率70.2%。
步骤(2)由化合物II制备化合物I,合并收率66.3%。
对比例1
对比例1参考文献记载的合成方法和数据(De,Subhadip,et al The Journal oforganic chemistry 78.16(2013):7823-7844):
由化合物II经酮肟化、苯甲磺酰化、Semmler-Wolff芳构化3步反应再经柱层析制备化合物I。
酮肟化:2g化合物II(10.5mmol),2.5eq盐酸羟胺,1.5eq醋酸钠,加入3ml乙醇,4ml水,室温搅拌2h,TLC跟踪至原料消失,20ml乙酸乙酯稀释,20ml水分层提取;分离有机层,无水硫酸钠干燥后真空浓缩,产物未分离。
苯甲磺酰化:上一步产物(按10.5mmol),氩气保护下加入乙二醇二甲醚,冷却至0℃,分批加入5.0eq NaH,加入3.0eq p-TsCl,升至室温,油浴70℃反应24h。TLC跟踪至原料消失,冰水淬灭反应,加入30ml乙酸乙酯萃取,再加入15ml水分液。有机层干燥后真空浓缩,产物未分离。
芳构化:上一步产物(按10.5mmol),加入KOH/甲醇溶液,甲醇溶剂;深红色反应液回流6h,冷却至室温倒入20ml冰水中,10ml乙酸乙酯萃取2次。饱和氯化钠洗涤,无水硫酸钠干燥,减压浓缩,柱层析分离得黑色固体化合物I(洗脱溶剂30%乙酸乙酯/正己烷),无纯度数据,合并收率50%。
由化合物II制备化合物I,本发明的实施例步骤(2)相对于该对比例,具有以下优点:
(1)反应步骤由3步缩短为2步,合并收率66%,远高于对比例的合并收率50%;
(2)芳构化反应采用贵金属催化剂催化反应,较对比例省却了肟基的对甲苯磺酰保护与KOH/ 甲醇水解,避免使用NaH等危险试剂,减少乙酸乙酯萃取、饱和氯化钠洗涤等后处理操作,反应更为安全、环保。
(3)所得化合物I纯度高,黄色晶体,GC纯度99.15%,对比例为黑色固体,无纯度数据。后处理操作简单,仅需从甲醇中重结晶即可得到高纯的化合物I晶体,无需柱层析洗脱分离。
本发明中所用原料、设备,若无特别说明,均为本领域的常用原料、设备;本发明中所用方法,若无特别说明,均为本领域的常规方法。
以上所述,仅是本发明的较佳实施例,并非对本发明作任何限制,凡是根据本发明技术实质对以上实施例所作的任何简单修改、变更以及等效变换,均仍属于本发明技术方案的保护范围。
Claims (12)
2.如权利要求1所述的制备方法,其特征在于:步骤(1)中,所述F-C酰化为1,2-亚甲二氧基苯与酰化试剂、催化剂A在反应溶剂A中于0-40℃的反应温度下进行。
3.如权利要求2所述的制备方法,其特征在于:步骤(1)中,
所述酰化试剂选自丁酸酐、丁二酸单乙酯酰氯或丁二酸单甲酯酰氯;
所述催化剂A选自无水三氯化铝、无水三氯化铁、三氟乙酸、无水氯化锌、PPA、三氯化铁或硅胶负载甲磺酸;
所述反应溶剂A选自二氯甲烷、硝基甲烷、硝基苯和二硫化碳中的一种或多种;
所述F-C酰化的反应温度为10-30℃;
所述1,2-亚甲二氧基苯、酰化试剂和催化剂A的当量比为1∶1-1.5∶1-1.5。
4.如权利要求1所述的制备方法,其特征在于:步骤(1)中,所述催化氢化为化合物B和催化剂B在反应溶剂B中于50-80℃的反应温度下进行。
5.如权利要求4所述的制备方法,其特征在于:步骤(1)中,
所述催化剂B为Pd/C;
所述反应溶剂B选自甲醇、乙醇和异丙醇中的一种或多种;
所述催化氢化的反应温度为60-80℃。
6.如权利要求1所述的制备方法,其特征在于:步骤(1)中,所述环合反应为化合物C与酸性催化剂C在反应溶剂C中于20-110℃的反应温度下进行。
7.如权利要求6所述的制备方法,其特征在于:步骤(1)中,
所述酸性催化剂C选自多聚磷酸、硫酸、甲磺酸、三氯化铁、三氯化铝、四氯化锡、醋酸酐、三氟化硼乙醚、三氟乙酸、三氟乙酸酐和PPE中的一种或多种;
所述反应溶剂C选自二氯甲烷、甲苯和氯苯中的一种或多种;
所述环合反应的反应温度为20-40℃;
所述化合物C和酸性催化剂C的当量比为1∶0.5-1.5。
8.如权利要求1所述的制备方法,其特征在于:步骤(2)中,所述肟化反应为化合物II和肟化试剂II在反应溶剂II中于40-80℃的反应温度下进行。
9.如权利要求8所述的制备方法,其特征在于:步骤(2)中,
所述肟化试剂II选自盐酸羟胺、硫酸羟胺、磷酸羟胺、醋酸钠、醋酸钾和氢氧化钠中的一种或多种;
所述反应溶剂II选自甲醇、乙醇和异丙醇中的一种或多种;
所述肟化反应的反应温度为50-80℃;
所述化合物II和肟化试剂II的当量比为1∶0.5-2.5。
10.如权利要求1所述的制备方法,其特征在于:步骤(2)中,所述芳构化反应为化合物III和催化剂III在反应溶剂III于110-280℃的反应温度下进行。
11.如权利要求10所述的制备方法,其特征在于:步骤(2)中,
所述催化剂III为Pd/C;
所述反应溶剂III选自乙二醇二甲醚、二乙二醇二甲醚和三乙二醇二甲醚中的一种或多种;
所述芳构化的反应温度为150-250℃。
12.如权利要求1-11之一所述制备方法制得的芳香性苯并[c]菲啶类生物碱中间体化合物在合成血根碱、白屈菜红碱或氯化两面针碱中的应用。
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