CN106565521A - (s)‑2‑[3‑(3‑氟苄基)‑4‑(3‑氟苄氧基)苄氨基]丙酰胺及其盐的制备方法 - Google Patents

(s)‑2‑[3‑(3‑氟苄基)‑4‑(3‑氟苄氧基)苄氨基]丙酰胺及其盐的制备方法 Download PDF

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CN106565521A
CN106565521A CN201610717934.6A CN201610717934A CN106565521A CN 106565521 A CN106565521 A CN 106565521A CN 201610717934 A CN201610717934 A CN 201610717934A CN 106565521 A CN106565521 A CN 106565521A
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luorobenzyls
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fluorine
propionic acid
acid amide
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林祖峰
贾江南
刘涛
三迪普·萨达帕
张立兵
万光敏
陈为人
姚成志
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Zhejiang Menovo Pharmaceutical Co Ltd
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Abstract

本发明涉及一种(S)‑2‑[3‑(3‑氟苄基)‑4‑(3‑氟苄氧基)苄氨基]丙酰胺及其盐的制备方法,其中,(S)‑2‑[3‑(3‑氟苄基)‑4‑(3‑氟苄氧基)苄氨基]丙酰胺的盐是指(S)‑2‑[3‑(3‑氟苄基)‑4‑(3‑氟苄氧基)苄氨基]丙酰胺甲磺酸盐,该制备方法通过合成新的化合物2‑(3‑溴‑4‑((3‑氟苄基)氧基)苯基)‑1,3‑二氧戊环与化合物2‑((3‑氟苄基)氧基)‑5‑甲酰基苯硼酸进行目标产物的制备,属于全新的制备方法,且该制备方法所制备(S)‑2‑[3‑(3‑氟苄基)‑4‑(3‑氟苄氧基)苄氨基]丙酰胺收率为49.57%,HPLC纯度达到78.92%,所制备(S)‑2‑[3‑(3‑氟苄基)‑4‑(3‑氟苄氧基)苄氨基]丙酰胺的盐收率为50.40%,HPLC纯度达到96.35%,较现有技术获得极大提高。

Description

(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺及其 盐的制备方法
技术领域
本发明涉及一种(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺及其盐的制备方法。
背景技术
沙芬酰胺(Safinamide)是一种钠通道阻滞剂、钙通道调节剂、单胺氧化酶B(MAO-B)抑制剂、谷氨酸盐释放抑制剂和多巴胺代谢调节剂。现有技术在制备沙芬酰胺的工艺中涉及到两种重要的杂质,即为(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺(化合物10)及其盐(化合物11)。
目前存在的许多药物正是由于特殊杂质的存在,对人体的代谢产生无法预测的毒性而放弃继续研发。根据现有技术中对沙芬酰胺的研究表明,上述杂质显示对细胞色素P450系统的酶具有极高的毒性。因此,对杂质10、11的研究十分重要,而目前关于上述杂质合成方法的文献报道相对较少,收率及纯度也难以得到保证。
发明内容
本发明所要解决的技术问题是针对现有技术的现状,提供一种(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺及其盐的制备方法,该方法可显著提高纯度及收率。
本发明解决上述技术问题所采用的技术方案为:一种(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺及其盐的制备方法,其特征在于包括以下步骤:
(1)合成3-溴-4-[(3-氟苄基)氧基]苯甲醛
在碳酸钾、四丁基溴化铵存在下,向有机溶剂中加入3-溴-4-羟基苯甲醛(下式1化合物)及间氟溴苄(下式2化合物),反应完毕得到合成3-溴-4-[(3-氟苄基)氧基]苯甲醛(下式3化合物);
(2)合成4-甲基苯磺酸吡啶鎓
对甲苯磺酸(下式4化合物)与吡啶(下式5化合物)在氮气保护下反应生成4-甲基苯磺酸吡啶鎓(下式6化合物);
(3)合成2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环
步骤(1)所得3-溴-4-[(3-氟苄基)氧基]苯甲醛(式3化合物)与步骤(2)所得4-甲基苯磺酸吡啶鎓(式6化合物)反应生成2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环(下式7化合物);
(4)合成2-((3-氟苄基)氧基)-5-甲酰基苯硼酸
步骤(3)所得2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环(式7化合物)依次与硼酸三异丙酯、正丁基锂反应得到2-((3-氟苄基)氧基)-5-甲酰基苯硼酸(下式8化合物);
(5)合成3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛
步骤(4)所得2-((3-氟苄基)氧基)-5-甲酰基苯硼酸(式8化合物)先与1,4-二恶烷、间氟溴苄反应,然后向该反应物中加入三(二亚苄基丙酮)二钯,反应完毕得到目标产物的粗品3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛(下式9化合物);
(6)合成(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺
在无水硫酸镁、三乙胺及氰基硼氢化钠存在下,步骤(5)所得3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛(式9化合物)与L-丙氨酰胺盐酸盐反应,得到所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺(下式10化合物)。
在上述方案中,步骤(1)在氮气保护下进行,反应温度为80~~85℃(待定)70~90℃,反应时间为6~~7小时(待定)。反应完毕后,将反应物冷却至室温,过滤,除去无机盐,有机溶剂洗涤残余物,减压浓缩滤液,得到3-溴-4-(3-氟苄氧基)苯甲醛,提纯备用。
优选地,步骤(2)在氮气保护下进行,反应温度为0~5℃,反应完毕后,减压干燥,得到4-甲基苯磺酸吡啶。
优选地,步骤(3)在乙二醇溶剂存在下,反应温度90℃以上;反应完毕后冷却、洗涤、减压干燥得到2-(3-溴-4-(3-氟苄氧基)苯基)-1,3-二氧戊环。
优选地,步骤(4)的整个反应过程在氮气保护下进行,2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环与硼酸三异丙酯在常温下反应,然后与正丁基锂在-78℃下反应。反应结束后,用稀盐酸将反应液的pH调节至1~2,加热至~25~30℃,用有机相萃取,在50~55℃下用旋转蒸发仪减压浓缩得到2-((3-氟苄基)氧基)-5-甲酰基苯硼酸粗品,提纯后备用。
优选地,步骤(5)中在氮气保护下进行,且加入三(二亚苄基丙酮)二钯后升温至70℃进行反应。反应完毕后向反应液中加入硅藻土过滤,所得滤饼用1,4-二恶烷洗涤后在旋转蒸发仪中于60~65℃下减压蒸馏,所得油相用乙酸乙酯萃取后干燥、蒸馏得到粗品3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛。
一种(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的盐的制备方法,该盐的名称为(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺甲磺酸盐,其特征在于包括以下步骤:
上述步骤(6)所得(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺(式10化合物)与甲磺酸反应,即得到所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺甲磺酸盐(下式11化合物)。
与现有技术相比,本发明的优点在于:本发明提供了一种(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺及其盐的制备方法,该制备方法通过合成新的化合物7与化合物8进行目标产物的制备,属于全新的制备方法,且该制备方法所制备(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺收率为49.57%,HPLC纯度达到78.92%,所制备(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的盐收率为50.40%,HPLC纯度达到96.35%,较现有技术获得极大提高。
附图说明
图1为本发明实施例中步骤(1)产物的HPLC图谱;
图2为本发明实施例中步骤(1)产物的GC图谱;
图3为本发明实施例中步骤(1)产物的TIC图谱;
图4为本发明实施例中步骤(1)产物的UV图谱;
图5为本发明实施例中步骤(1)产物的Mass图谱;
图6为本发明实施例中步骤(1)产物的IR图谱;
图7为本发明实施例中步骤(2)产物的HPLC图谱;
图8为本发明实施例中步骤(2)产物的TIC图谱;
图9为本发明实施例中步骤(2)产物的UV图谱;
图10为本发明实施例中步骤(2)产物的Mass图谱(吡啶);
图11为本发明实施例中步骤(2)产物的Mass图谱(对甲苯磺酸);
图12为本发明实施例中步骤(3)产物的GC图谱;
图13为本发明实施例中步骤(3)产物的TIC图谱;
图14为本发明实施例中步骤(3)产物的UV图谱;
图15为本发明实施例中步骤(3)产物的Mass图谱;
图16为本发明实施例中步骤(3)产物的IR图谱;
图17为本发明实施例中步骤(4)产物的HPLC图谱;
图18为本发明实施例中步骤(4)产物的TIC图谱;
图19为本发明实施例中步骤(4)产物的UV图谱;
图20为本发明实施例中步骤(4)产物的Mass图谱;
图21为发明实施例中步骤(4)产物的IR图谱;
图22为本发明实施例中步骤(5)产物的HPLC图谱;
图23为本发明实施例中步骤(5)产物的TIC图谱;
图24为本发明实施例中步骤(5)产物的UV图谱;
图25为本发明实施例中步骤(5)产物的Mass图谱;
图26为发明实施例中步骤(5)产物的IR图谱;
图27为发明实施例中步骤(6)产物的HPLC图谱;
图28为本发明实施例中步骤(6)产物的TIC图谱;
图29为本发明实施例中步骤(6)产物的UV图谱;
图30为本发明实施例中步骤(6)产物的Mass图谱;
图31为发明实施例中步骤(7)产物的HPLC图谱;
图32为本发明实施例中步骤(7)产物的TIC图谱;
图33为本发明实施例中步骤(7)产物的UV图谱。
具体实施方式
以下结合附图实施例对本发明作进一步详细描述。
本实施例的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法包括以下步骤:
(1)依次向反应器中加入3-溴-4-羟基苯甲醛(25g,0.12mol)、甲苯(250mL)、碳酸钾(22.2g,0.161mol)、四丁基溴化铵(20g,0.062mol),然后通入氮气,所得混合物在室温下搅拌10分钟;
在氮气保护下,室温下、1小时内向上述反应混合物中逐滴加入间氟溴苄(23.5g,0.124mol),滴加完毕后,将该混合物缓慢加热到70~90℃,保温反应6小时;反应过程中由薄层色谱分析法(流动相为正己烷和10%的乙酸乙酯,在254nm紫外灯下)控制反应进度,如果薄层色谱反应不明显,再加入间氟溴苄(4.5g,0.023mol),直至反应继续进行直到薄层色谱显色良好;
反应完成后,将反应物冷却至室温,过滤除去无机盐,残留固相用25mL甲苯洗涤,在50~55℃的减压条件下浓缩滤液,得到3-溴-4-((3-氟苄基)氧基)苯甲醛粗品;
提纯:粗品3-溴-4-((3-氟苄基)氧基)苯甲醛在25~30℃下加入甲苯(25mL)搅拌溶解,在该溶液中逐滴加入正己烷(50mL)并不断搅拌,得到的悬浮液冷却至0~5℃并放置1小时;过滤出固体,滤饼用正己烷洗涤(25mL),将湿的滤饼放在45~50℃的减压烘箱中干燥4小时得到3-溴-4-((3-氟苄基)氧基)苯甲醛。
如图1~6所示,所得3-溴-4-((3-氟苄基)氧基)苯甲醛的质量为31g,收率为80.6%,GC色谱测得纯度为99.66%,HPLC测得纯度为99.34%。
(2)向反应器中加入对甲苯磺酸(5g,0.029mol),充氮条件下继续加入干燥的四氢呋喃(40mL),室温下进行反应;将反应溶液冷却至0~5℃,在该温度下向溶液中逐滴加入吡啶(2.75g,0.035mol),在20~30分钟内加完,搅拌30分钟;
反应物在氮气氛围中过滤,所得滤饼用5mL干燥的四氢呋喃洗涤,将湿的滤饼放在45~50℃的减压烘箱中干燥4小时得到4-甲基苯磺酸吡啶鎓。
如图7~11所示,所得4-甲基苯磺酸吡啶鎓的质量为6g,收率82.19%,HPLC检测纯度100%。
(3)向反应器中加入3-溴-4-((3-氟苄基)氧基)苯甲醛(25g,0.081mol),在搅拌作用下加入甲苯(500mL)、乙二醇(10g,0.161mol)、4-甲基苯磺酸吡啶鎓(1g,0.04mol);将反应混合物缓慢加热到回流,蒸出100毫升甲苯,反应溶液在回流温度下与水共沸蒸馏5小时,由气相色谱检测反应进展,如果反应未按计划进行,加入乙二醇(5g,0.081mol)让反应继续进行;反应结束后,反应物冷却至25~30℃,并用50mL NaHCO3水溶液洗涤;
洗涤后的有机物在5.0g硫酸钠中干燥,25~30℃温度下在旋转蒸发仪中减压浓缩得到2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环。
如图12~16所示,所得2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环质量为27.5g,收率96.3%,气相色谱检测纯度为98.89%.
(4)向反应器中加入2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环(25g,0.071mol),随后加入干燥的四氢呋喃(375mL)和硼酸三异丙酯(24g,0.127mol),在氮气保护下常温下反应;混合物冷却至-78℃,在该温度下逐滴加入正丁基锂和己烷混合物(11.3g,0.176mol),该操作应在氮气氛围中进行1小时,滴加完毕后混合搅拌4小时;由薄层层析色谱(TLC)检测反应进度,如果检测到反应不符合要求的进度,再加入正丁基锂和己烷混合物(1g,0.015mol),直到反应可以继续进行;
反应结束后,用稀盐酸(1:1)调节pH到1~2,反应混合物加热到25~30℃,再加入25ml水,搅拌30分钟;用乙酸乙酯萃取(3×75mL),有机相用硫酸钠干燥(10g),50~55℃下用旋转蒸发仪减压浓缩从而获得粗品2-((3-氟苄基)氧基)-5-甲酰基苯硼酸。
提纯:2-((3-氟苄基)氧基)-5-甲酰苯硼酸粗品在25~30℃搅拌下加入二氯甲烷(50mL),在不断搅拌下逐滴加入正己烷(250mL)到该溶液中,获得的悬浮液冷却至0~5℃并放置1小时;过滤得固体,滤饼用正己烷洗涤(25mL),将湿的滤饼放在45~50℃的减压烘箱中干燥4小时可得到2-((3-氟苄基)氧基)-5-甲酰基苯硼酸。
如图17~21所示,所得2-((3-氟苄基)氧基)-5-甲酰基苯硼酸质量为13.8g,收率71.13%,HPLC检测纯度96.19%。
(5)向反应器中加入2-((3-氟苄基)氧基)-5-甲酰基苯硼酸(25g,0.91mol),在室温、氮气条件下逐一加入1,4-二恶烷(250mL)、水(25mL)、间氟溴苄(25.8g,0.136mol),反应混合物中通入30分钟氮气来排除氧气;再向反应物中加入三(二亚苄基丙酮)二钯(1.75g,0.002mol),将反应物缓慢升温到70℃搅拌两小时,反应进程由薄层色谱检测;如果反应未按计划进行,则加入三(二亚苄基丙酮)二钯(0.2g),在70℃继续反应,直到达成目标结果;
反应结束后,混合物冷却至室温,用硅藻土过滤,滤饼由1,4-二恶烷(25mL)洗涤;然后在旋转蒸发仪60~65℃下减压蒸馏得到油相;残余的油相加入水(100ml),再用乙酸乙酯萃取(3×100mL),有机相使用硫酸钠(10g)干燥,再用旋转蒸发仪在50~55℃减压条件下干燥粗品得到3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛;
提纯:3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛粗品经硅胶柱层析法(mesh-20)提纯,使用正己烷:乙酸乙酯(9.8:0.2)做为洗脱液来获得3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛。
如图22~26所示,所得3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛质量为20g,收率为64.85%,HPLC检测纯度为97.82%。
(6)室温氮气保护下,向250mL的四口烧瓶中依次加入甲醇150mL,8.5g L-丙氨酰胺盐酸,毕,搅拌10min溶清,毕,降温至0~5℃,于此温度下加入三乙胺9g,搅拌30min,保持溶清;毕,降温至15~20℃,并于此温度下加入10g化合物9及19.7g无水硫酸镁,于此温度下保温反应15min,保毕,降温至10~15℃,于此温度下保温反应6h;保温毕,同温下分两批加入氰基硼氢化钠2.8g并于此温度下保温反应15h;
通过TLC监控化合物9反应完全后减压蒸馏除去甲醇至尽,该过程控制真空度P=0.095Mpa,温度40~50℃;蒸毕加入水100mL、二氯甲烷200mL,加毕,于室温下搅拌15min;毕,静置分层,水层用30mL*2二氯甲烷提取两次;合并二氯甲烷有机层用25%氨水25mL*2洗涤两次,合并二氯甲烷层用10g元明粉干燥至澄清;毕,去减压蒸除二氯甲烷至尽,该过程控制温度35~45℃,真空度P=0.095MPa,得到油状物10g;
室温下往油状物中加入甲苯10mL,溶清后加入环己烷100mL搅拌30min;降温至0~5℃析晶12h;过滤,用30mL环己烷淋洗;抽滤至干取出固体于40~45℃减压干燥12h,得到(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺。
如图27~30所示,所得(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺质量为6g,收率为49.57%,HPLC检测纯度为78.92%。
本实施例中(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的盐是指(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺甲磺酸盐,其制备过程是在上述步骤(1)~(6)的基础上增加了下述步骤:
(7)室温氮气保护下,向50mL的四口烧瓶中依次加入乙酸乙酯30mL、2.0g上述步骤(6)所得化合物(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺,毕,升温至45~50℃,保温搅拌15min;溶清后滴加0.5g甲磺酸与10mL乙酸乙酯组成的混合溶液,约15min内滴加完;毕,于此温度下保温搅拌30min;保毕,降温至10~15℃析晶2h,毕,过滤,用10mL乙酸乙酯淋洗滤饼,取出滤饼于45~50℃减压干燥2h,得到目标产物(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺甲磺酸盐。
如图31~33所示,所得(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺甲磺酸盐为1.5g,收率为50.4%,HPLC检测纯度为96.35%。

Claims (10)

1.一种(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法,其特征在于包括以下步骤:
(1)合成3-溴-4-[(3-氟苄基)氧基]苯甲醛
在碳酸钾、四丁基溴化铵存在下,向有机溶剂中加入对羟基苯甲醛(下式1化合物)及间氟溴苄(下式2化合物),反应完毕得到合成3-溴-4-[(3-氟苄基)氧基]苯甲醛(下式3化合物);
(2)合成4-甲基苯磺酸吡啶鎓
对甲苯磺酸(下式4化合物)与吡啶(下式5化合物)在氮气保护下反应生成4-甲基苯磺酸吡啶鎓(下式6化合物);
(3)合成2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环
步骤(1)所得3-溴-4-[(3-氟苄基)氧基]苯甲醛(式3化合物)与步骤(2)所得4-甲基苯磺酸吡啶鎓(式6化合物)反应生成2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环(下式7化合物);
(4)合成2-((3-氟苄基)氧基)-5-甲酰基苯硼酸
步骤(3)所得2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环(式7化合物)依次 与硼酸三异丙酯、正丁基锂反应得到2-((3-氟苄基)氧基)-5-甲酰基苯硼酸(下式8化合物);
(5)合成3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛
步骤(4)所得2-((3-氟苄基)氧基)-5-甲酰基苯硼酸(式8化合物)先与1,4-二恶烷、间氟溴苄反应,然后向该反应物中加入三(二亚苄基丙酮)二钯,反应完毕得到目标产物的粗品3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛(下式9化合物);
(6)合成(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺
在无水硫酸镁、三乙胺及氰基硼氢化钠存在下,步骤(5)所得3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛(式9化合物)与L-丙氨酰胺盐酸盐反应,得到所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺(下式10化合物)。
2.根据权利要求1所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法,其特征在于:步骤(1)在氮气保护下进行,反应温度为70~90℃;反应完毕后,将反应物冷却至室温,过滤,除去无机盐,残余固相用有机溶剂洗涤,然后减压浓缩滤液,得到3-溴-4-(3-氟苄氧基)苯甲醛,提纯备用。
3.根据权利要求1所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法,其特征在于:步骤(2)在氮气保护下进行,反应温度为0~5℃,反应完毕后减压干燥,得到4-甲基苯磺酸吡啶。
4.根据权利要求1所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法,其特征在于:步骤(3)在乙二醇溶剂存在下,反应温度为90℃以上。
5.根据权利要求4所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法,其特征在于:反应完毕后冷却、洗涤、减压干燥得到2-(3-溴-4-(3-氟苄氧基)苯基)-1,3-二氧戊环。
6.根据权利要求1所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法,其特征在于:步骤(4)的整个反应过程在氮气保护下进行,2-(3-溴-4-((3-氟苄基)氧基)苯基)-1,3-二氧戊环先与硼酸三异丙酯在常温下反应,然后与正丁基锂在-78℃下反应。
7.根据权利要求6所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法,其特征在于:反应结束后,用稀盐酸将反应液的pH调节至1~2,加热至25~30℃,用有机相萃取,在50~55℃下用旋转蒸发仪减压浓缩得到2-((3-氟苄基)氧基)-5-甲酰基苯硼酸粗品,提纯后备用。
8.根据权利要求1所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法,其特征在于:步骤(5)中在氮气保护下进行,且加入三(二亚苄基丙酮)二钯后升温至70℃进行反应。
9.根据权利要求8所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的制备方法,其特征在于:反应完毕后向反应液中加入硅藻土过滤,所得滤饼用1,4-二恶烷洗涤后在旋转蒸发仪中于60~65℃下减压蒸馏,所得油相用乙酸乙酯萃取后干燥、蒸馏得到粗品3-(3-氟苄基)-4-(3-氟苄氧基)苯甲醛。
10.一种(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺的盐的制备方法,该盐的名称为(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺甲磺酸盐,其特征在于包括以下步骤:
权利要求1所得(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺(式10化合物)与甲磺酸反应,即得到所述的(S)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺甲磺酸盐(下式11化合物)。
CN201610717934.6A 2016-08-24 2016-08-24 (s)-2-[3-(3-氟苄基)-4-(3-氟苄氧基)苄氨基]丙酰胺及其盐的制备方法 Active CN106565521B (zh)

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