CN102161642A - 合成伊伐布雷定及其可药用酸加成盐的方法 - Google Patents

合成伊伐布雷定及其可药用酸加成盐的方法 Download PDF

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CN102161642A
CN102161642A CN2011100388352A CN201110038835A CN102161642A CN 102161642 A CN102161642 A CN 102161642A CN 2011100388352 A CN2011100388352 A CN 2011100388352A CN 201110038835 A CN201110038835 A CN 201110038835A CN 102161642 A CN102161642 A CN 102161642A
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J-L·派格利昂
P·凯尼亚尔
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Abstract

本发明涉及合成伊伐布雷定及其可药用酸加成盐的方法。伊伐布雷定如式(I)所示。

Description

合成伊伐布雷定及其可药用酸加成盐的方法
技术领域
本发明涉及合成式(I)的伊伐布雷定
或3-{3-[{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}(甲基)氨基]丙基}-7,8-二甲氧基-1,3,4,5-四氢-2H-3-苯并氮杂-2-酮,及其可药用酸加成盐以及其水合物的方法。
背景技术
伊伐布雷定,及其可药用酸加成盐,更特别是其盐酸盐,具有非常有价值的药理学和治疗特性,尤其是减缓心率的特性,这使得这些化合物可用于治疗或预防心肌缺血的多种临床表现,例如心绞痛、心肌梗塞和相关的节律紊乱,也可用于涉及节律紊乱的多种疾病,尤其是室上性心律失常,并可用于心力衰竭。
伊伐布雷定及其可药用酸加成盐、更特别是其盐酸盐的制备和治疗用途已经在欧洲专利说明书EP 0534859中描述。
这篇专利说明书描述了从式(II)的化合物开始合成伊伐布雷定盐酸盐:
Figure BDA0000046957350000013
将其拆分,得到式(III)的化合物:
Figure BDA0000046957350000021
将后者与式(IV)的化合物反应:
Figure BDA0000046957350000022
得到式(V)的化合物:
Figure BDA0000046957350000023
将式(V)的化合物催化氢化得到伊伐布雷定,然后转化为其盐酸盐。
该合成路线的缺点是导致伊伐布雷定的产率仅有1%。
考虑到该化合物的药用价值,能够通过有效的合成方法获得较好产率的伊伐布雷定显得很重要。
发明内容
本发明涉及合成式(I)的伊伐布雷定的方法:
Figure BDA0000046957350000024
该方法的特征在于将式(VI)的化合物:
Figure BDA0000046957350000031
在有机溶剂中经过硫醇的作用形成式(VII)的硫代半缩醛:
Figure BDA0000046957350000032
其中R表示取代或未取代的、任选被全氟代的直链或支链烷基,取代或未取代的芳基,取代或未取代的苄基,或基团CH2CO2Et,
将其进行环化反应,得到式(VIII)的化合物:
Figure BDA0000046957350000033
其中R如上文所定义,
将式(VIII)的化合物进行还原反应得到式(I)的伊伐布雷定,后者可以任选地转化为其可药用酸加成盐,所述可药用酸选自盐酸、氢溴酸、硫酸、磷酸、乙酸、三氟乙酸、乳酸、丙酮酸、丙二酸、琥珀酸、戊二酸、富马酸、酒石酸、马来酸、柠檬酸、抗坏血酸、草酸、甲磺酸、苯磺酸和樟脑酸,并可转化为其水合物。
在形成式(VII)的硫代半缩醛的反应中所用的溶剂优选为二氯甲烷。
选择用来与式(VI)的化合物反应的硫醇优选为苯硫酚。
在式(VII)化合物形成式(VIII)化合物的环化反应中所用的溶剂优选为二氯甲烷。
在本发明优选的实施方案中,式(VII)化合物形成式(VIII)化合物的环化反应在选自乙酸酐、三氟乙酸酐和三甲基硅烷基三氟甲磺酸酯的试剂存在下进行。
式(VII)化合物形成式(VIII)化合物的环化反应更优选在三氟乙酸酐存在下进行。
式(VII)化合物形成式(VIII)化合物的环化反应甚至更加优选在三氟乙酸酐和路易斯酸存在下进行,所述路易斯酸选自BF3.OEt2、Sc(OTf)3和Yb(OTf)3
式(VII)化合物形成式(VIII)化合物的环化反应甚至更加优选在三氟乙酸酐和BF3.OEt2存在下进行。
还原式(VIII)化合物的反应优选在乙醇中在兰尼镍存在下或在四氢呋喃中在碘化钐(II)存在下进行。
式(VI)、(VII)和(VIII)的化合物是新产品,其可用作化学或制药工业的合成中间体,尤其是用于伊伐布雷定及其可药用酸加成盐和水合物的合成,因此,它们形成了本发明化合物的一个完整的部分。
具体实施方式
所用缩写的列表:
DMF:N,N-二甲基甲酰胺
DMSO:二甲基亚砜
THF:四氢呋喃
IR:红外光谱
以下的实施例举例说明了本发明。
使用Kofler block(KB)测量熔点(MP)。
红外光谱在带有Golden Gate ATR附件的Bruker Tensor 27红外仪上记录。物质以纯形式放置在托盘上。
实施例1:[2-(3,4-二甲氧基苯基)乙基]氨基甲酸叔丁基酯
将二碳酸二叔丁基酯(12g;55.2mmol)加入2-(3,4-二甲氧基苯基)乙基胺(10g;55.2mmol)在二氯甲烷(200mL)的溶液中。在环境温度下接触1小时后,将反应混合物减压浓缩。残余物容纳在戊烷(100mL)中,在环境温度下接触1小时后,将混悬液通过釉料过滤。得到13.2g的标题产物,为固体形式。
产率=85%
m.p.=65±2℃。
实施例2:3-[{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}(甲基)氨基]丙基-[2-(3,4-二甲氧基苯基)乙基]氨基甲酸叔丁基酯
在环境温度下,将NaH(60%,在油中)(1.14g;28.5mmol)分成小批加入上述步骤获得的化合物(7.6g;27mmol)在40mL DMF的溶液中。在环境温度下接触1小时后,将3-氯-N-{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}-N-甲基-1-丙胺(7.68g;27mmol)在16mL DMF中的溶液加入,接着将反应混合物在80℃加热3小时。在冷却到环境温度后,将反应混合物倒入蒸馏水和冰的混合物中。水相用乙酸乙酯萃取。合并的有机相用MgSO4干燥,接着减压浓缩。残余物经硅胶色谱纯化(CH2Cl2/EtOH:95/5),得到9.1g的标题产物,为油状。
产率=64%
IR:v=3340,1678,1519,1167cm-1
实施例3:N-{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}-N′-[2-(3,4-二甲氧基苯基)乙基]-N-甲基-1,3-丙二胺
将9g(17mmol)上述步骤获得的化合物溶解在2.8N HCl的乙醇溶液中。在环境温度下接触2小时后,将反应混合物减压浓缩。残余物容纳在1N氢氧化钠溶液中,接着将水相用乙酸乙酯萃取。在用MgSO4干燥有机相后,减压浓缩,得到6.8g的标题产物,为油状。
产率=93%
IR:v=3304,2793,1261,1236,1205,1153cm-1
实施例4:N-{3-[{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}(甲基)氨基]丙基}-N-[2-(3,4-二甲氧基苯基)乙基]-2-羟基乙酰胺
步骤1:乙酸2-{{3-[{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}(甲基)氨基]丙基}-[2-(3,4-二甲氧基苯基)乙基]氨基}-2-氧代乙基酯
在0℃,向上述步骤获得的化合物(6.8g;15.8mmol)在200mL二氯甲烷的溶液中加入三乙胺(3.1g;22mmol),接着滴加乙酰氧基乙酰氯(2.1mL;19mmol)。在环境温度下接触0.5小时后,将反应混合物用蒸馏水洗涤,接着有机相用MgSO4干燥。减压浓缩有机相后,获得8g的标题产物,为油状,其不经纯化直接用于下一步骤。
步骤2:N-{3-[{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}(甲基)氨基]丙基}-N-[2-(3,4-二甲氧基苯基)乙基]-2-羟基乙酰胺
将K2CO3(8.3g;60.4mmol)加入上述步骤获得的化合物(8g)在80mL的水/甲醇混合物(2/1)的溶液中。在环境温度下接触1小时后,将反应混合物减压浓缩并将残余物容纳在蒸馏水中。在用乙酸乙酯萃取后,合并的有机相用MgSO4干燥,接着减压浓缩。得到6.2g的标题产物,为油状。
产率=81%(2个步骤)
IR:v=3406,2794,1641,1261,1236,1205,1153cm-1
实施例5:N-{3-[{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}(甲基)氨基]丙基}-N-[2-(3,4-二甲氧基苯基)乙基]-2-氧代乙酰胺
在-78℃向草酰氯(0.6mL;6.77mmol)在25mL二氯甲烷的溶液中加入DMSO(0.9mL;12.32mmol)在5mL二氯甲烷中的溶液。在-78℃接触1小时后,历经0.5小时将上述步骤获得的化合物(3g;6.16mmol)在25mL二氯甲烷中的溶液加入。在-78℃接触1小时后,加入三乙胺(4.3mL;30.8mmol);接着将反应混合物在环境温度搅拌3小时,然后倒入饱和NaHCO3水溶液中。有机相用MgSO4干燥,接着减压浓缩。得到2.7g的标题产物,为油状。
产率=89%
IR:v=2788,1645,1589,1261,1236,1207,1151cm-1
实施例6:3-{3-[{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}(甲基)氨基]丙基}-7,8-二甲氧基-1-(苯基硫基)-1,3,4,5-四氢-2H-3-苯并氮杂
Figure BDA0000046957350000071
-2-酮
将苯硫酚(0.53mL;5.17mmol)加入上述步骤获得的化合物(2.6g;5.17mmol)在60mL二氯甲烷的溶液中。在环境温度下接触过夜后,连续加入三氟乙酸酐(6.5mL;47mmol)和BF3.OEt2(6.5mL;26mmol)。将反应混合物在环境温度下搅拌3小时,接着倒入饱和NaHCO3水溶液中。用MgSO4干燥有机相并减压浓缩后,所得残余物经硅胶色谱(CH2Cl2/EtOH/NH4OH28%:97/3/0.3)纯化。得到1.15g的标题产物,为油状。
产率=38%
IR:v=2790,1641,1245,1205,1174cm-1
实施例7:3-{3-[{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}(甲基)氨基]丙基}-7,8-二甲氧基-1,3,4,5-四氢-2H-3-苯并氮杂
Figure BDA0000046957350000072
-2-酮
将兰尼镍(2.5g)(50%,在H2O中)加入上述步骤获得的化合物(0.8g;1.39mmol)在乙醇的溶液中。在回流下接触1小时后,冷却混悬液,接着用硅藻土过滤。得到600mg的标题产物,为油状。
产率=94%
IR:v=2788,1646,1519,1461,1245,1105cm-1
实施例8:3-{3-[{[(7S)-3,4-二甲氧基二环[4.2.0]辛-1,3,5-三烯-7-基]甲基}(甲基)氨基]丙基}-7,8-二甲氧基-1,3,4,5-四氢-2H-3-苯并氮杂
Figure BDA0000046957350000081
-2-酮盐酸盐
从上述步骤所得的产物开始,按照专利说明书EP 0534859(实施例2,步骤E)所述的操作制备标题产物。

Claims (12)

1.合成式(I)的伊伐布雷定的方法:
其特征在于将式(VI)的化合物:
Figure FDA0000046957340000012
在有机溶剂中经过硫醇的作用形成式(VII)的硫代半缩醛:
其中R表示取代或未取代的、任选被全氟代的直链或支链烷基,取代或未取代的芳基,取代或未取代的苄基,或基团CH2CO2Et,
将其进行环化反应,得到式(VIII)的化合物:
Figure FDA0000046957340000014
其中R如上文所定义,
将式(VIII)的化合物进行还原反应得到式(I)的伊伐布雷定,后者可以任选地转化为其可药用酸加成盐,所述可药用酸选自盐酸、氢溴酸、硫酸、磷酸、乙酸、三氟乙酸、乳酸、丙酮酸、丙二酸、琥珀酸、戊二酸、富马酸、酒石酸、马来酸、柠檬酸、抗坏血酸、草酸、甲磺酸、苯磺酸和樟脑酸,并可转化为其水合物。
2.根据权利要求1所述的合成方法,其特征在于在形成式(VII)的硫代半缩醛的反应中所用的有机溶剂为二氯甲烷。
3.根据权利要求1或2所述的合成方法,其特征在于与式(VI)的化合物反应的硫醇为苯硫酚。
4.根据权利要求1-3中任一项所述的合成方法,其特征在于在式(VII)化合物形成式(VIII)化合物的环化反应中所用的溶剂为二氯甲烷。
5.根据权利要求1-4中任一项所述的合成方法,其特征在于式(VII)化合物形成式(VIII)化合物的环化反应在选自乙酸酐、三氟乙酸酐和三甲基硅烷基三氟甲磺酸酯的试剂存在下进行。
6.根据权利要求5所述的合成方法,其特征在于式(VII)化合物形成式(VIII)化合物的环化反应在三氟乙酸酐存在下进行。
7.根据权利要求6所述的合成方法,其特征在于式(VII)化合物形成式(VIII)化合物的环化反应在三氟乙酸酐和路易斯酸存在下进行,所述路易斯酸选自BF3.OEt2、Sc(OTf)3和Yb(OTf)3
8.根据权利要求7所述的合成方法,其特征在于式(VII)化合物形成式(VIII)化合物的环化反应在三氟乙酸酐和BF3.OEt2存在下进行。
9.根据权利要求1-8中任一项所述的合成方法,其特征在于还原式(VIII)化合物的反应在乙醇中在兰尼镍存在下或在四氢呋喃中在碘化钐(II)存在下进行。
10.式(VI)的化合物:
Figure FDA0000046957340000021
11.式(VII)的化合物:
Figure FDA0000046957340000031
其中R表示取代或未取代的、任选被全氟代的直链或支链烷基,取代或未取代的芳基,取代或未取代的苄基,或基团CH2CO2Et。
12.式(VIII)的化合物:
Figure FDA0000046957340000032
其中R如权利要求11所定义。
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