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CN1360576A - 制备螺[(4-环己酮)-[3h]吲哚-2′[1′h]-酮衍生物的新方法 - Google Patents

制备螺[(4-环己酮)-[3h]吲哚-2′[1′h]-酮衍生物的新方法 Download PDF

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CN1360576A
CN1360576A CN00810315A CN00810315A CN1360576A CN 1360576 A CN1360576 A CN 1360576A CN 00810315 A CN00810315 A CN 00810315A CN 00810315 A CN00810315 A CN 00810315A CN 1360576 A CN1360576 A CN 1360576A
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CN1149194C (zh
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C·冈克兹
E·克希考斯
I·赫梅克兹
G·海加
A·伊拉
L·纳吉
A·桑塔尼科苏托
A·西蒙
K·西蒙
A·斯迈尔科尼埃塞克
T·斯佐默
G·斯兹沃伯达
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Abstract

本发明涉及一种制备通式I的螺[(4-环己酮)-[3H]吲哚-2′[1′H]-酮衍生物的方法,其中,R1和R2独立地表示氢、C1-4烷基、C1-4烷氧基、C1-4烷硫基、C1-4全氟烷基、C1-4全氟烷氧基、C3-7环烷氧基、C3-7环烷硫基、苯氧基、苄氧基或硝基,所述方法的特征在于,将通式II的二氢吲哚-2-酮衍生物,其中,R1和R2定义同上,与能引入保护基的化合物反应,将得到的通式III化合物,其中,R1和R2定义同上且A表示保护基,与丙烯酸C1-4酯偶合,将得到的通式IV化合物环化,其中,R1和R2定义同上,R3表示C1-4烷基且A表示保护基,消去通式V表示的酮酸酯的-COOR3和A保护基,其中,R1和R2定义同上,R3表示C1-4烷基且A表示保护基,任选不分离通式IV和/或V和/或VI的化合物。

Description

制备螺[(4-环己酮)-[3H]吲哚-2′[1′H] -酮衍生物的新方法
螺[(4-环己酮)-[3H]吲哚-2′[1′H]-酮和二螺[(1,3-二氧戊环)-2,4′-环己烷-[3H]吲哚]-2″[1″H]-酮衍生物是后叶加压素V2拮抗化合物SR121463的重要中间体。例如,如WO 9715556所述,将4-乙氧基苯肼与4-(1,3-二氧戊环)环己烷羧酸钠盐反应,然后将得到的1-(4′-乙氧基苯基)-2-(4″-/1,3-二氧戊环/-环己烷-羰基)-肼环化,可制得二螺[(1,3-二氧戊环)-2,4′-环己烷-1,3″-(5″-乙氧基)-[3H]吲哚]-2″[1″H]-酮(式VII化合物)。
根据其它合成路线(EP636608),通过将螺[(4-羟基-环己烷)-1,3′-(5′-乙氧基)-[3H]吲哚-2′[1′H]-酮氧化成适当的环己酮衍生物,然后与乙二醇反应,制得式VII化合物缩酮。
上述合成方法的缺点在于反应原料有毒、合成步骤多、一些合成步骤的收率低、试剂昂贵而且某些反应的反应条件激烈。
令人吃惊的是,我们发现,与文献(Annalen 1941,548,117-146;J.Am.Chem.Soc.1953,75,5301-5305;J.Chem.Soc.C,1970,796-800,J.Med.Chem.1993,36,2459-2469)公开的类似反应大不相同,将丙烯酸甲酯或丙烯酸乙酯与5-乙氧基-吲哚满酮加成,然后进行迪克曼缩合、水解和脱羧反应,不会形成均一产物。这就是为什么上述文献描述的方法不适合于工业合成的原因。我们发现,如果希望后续反应按预定方向进行,则5-乙氧基吲哚满酮1-位上的氢原子必须被保护基取代。
本发明的目的是提供一种制备通式I所示的螺[(4-环己酮)-[3H]吲哚-2′[1′H]-酮衍生物的方法,其中,R1和R2独立地表示氢、C1-4烷基、C1-4烷氧基、C1-4烷硫基、C1-4全氟烷基、C1-4全氟烷氧基、C3-7环烷氧基、C3-7环烷硫基、苯氧基、苄氧基或硝基,所述方法的特征在于,将通式II的二氢吲哚-2-酮衍生物,其中,R1和R2定义同上,与能引入保护基的化合物反应,将得到的式III化合物与丙烯酸C1-4酯偶合,式III中,R1和R2定义同上,A表示保护基,将得到的式IV化合物环化,其中,R1和R2定义同上,R3表示C1-4烷基,A表示保护基,消去通式V表示的酮酸酯的-COOR3和A保护基,其中,R1和R2定义同上,R3表示C1-4烷基,A表示保护基,任选不分离通式IV和/或通式V和/或通式VI化合物(参见“图1和2”)。至于能引入保护基的化合物,优选使用2,3-二氢吡喃、原甲酸三乙酯或丙烯酸C1-4酯。
通式II化合物与能引入保护基的化合物之间的反应优选在催化剂存在下,更优选在对甲苯磺酸存在下进行,其中,R1和R2定义同上。至于溶剂,可使用卤代烃,优选使用二氯甲烷。
通式II或III化合物,其中R1、R2和A定义同上,与丙烯酸C1-4酯之间的反应在催化剂存在下,优选在碱金属醇盐存在下,更优选在醇钠存在下进行。
在碱金属醇盐存在下,优选在乙醇钠、叔丁醇钾存在下进行通式IV化合物的环化反应。
在碱存在下,在极性溶剂中,使用丙烯酸C1-4酯引入保护基,上述方法能有利地按“一锅”法进行。
通式III、IV、V和VI化合物是新化合物,其中R1、R2、R3和A定义同上。
通过下述实施例进一步详细说明本发明,但所述实施例不限制本发明权利要求。
                           实施例1./  将2.12g对甲苯磺酸和880ml二氯甲烷加入到38.33g 5-乙氧基-茚满-2-酮中,然后搅拌加入59ml二氢吡喃。搅拌反应混合物直至完全溶解(约2小时),然后静置36小时。用8%碳酸氢钠水溶液洗涤所得的棕色溶液,用硫酸钠干燥,并蒸发。将残余物缓慢倾入500ml石油醚中。滤出沉淀,用少量石油醚洗涤。得到42.4g 1-(2-四氢吡喃基)-5-乙氧基-二氢吲哚-2-酮,熔点:108-110℃。收率:75%。
将1.2g乙醇钠和440ml甲苯加入到41.8g 1-(2-四氢吡喃基)-5-乙氧基-二氢吲哚-2-酮中。在25℃,在搅拌下,用4小时向所得溶液中缓慢加入34ml丙烯酸乙酯。再搅拌反应混合物2小时,然后用8%碳酸氢钠水溶液洗涤,用硫酸钠干燥,用活性炭澄清,过滤并真空浓缩。
将残余物缓慢倾入到250ml石油醚中,滤出固体物质,用石油醚洗涤。得到58g1-(2-四氢吡喃基)-3-(二-/乙氧基羰基乙基/)-5-乙氧基-二氢吲哚-2-酮,熔点:84-86℃。收率:78%。
在55℃,将178g1-(2-四氢吡喃基)-3-(二-/乙氧基羰基乙基/)-5-乙氧基-二氢吲哚-2-酮的1300ml甲苯溶液与60.4g乙醇钠和6g溴化四丁基铵一起搅拌3.5小时。冷却后,依次用300ml冰冷水、300ml1N盐酸和150ml水萃取反应混合物,用活性炭和漂白土澄清并过滤。真空蒸发滤液,在790ml 50%乙醇和315ml浓盐酸的混合物中搅拌加热回流残余物3.5小时。然后将混合物倾入3000ml水中,水相用2×600ml和3×300ml甲苯萃取,用硫酸钠干燥并真空蒸发。在异丙醚中结晶残余物。滤出所得物料,用异丙醚洗涤。得到60.1g螺[(4-环己酮)-1,3′(5′-乙氧基)-[3H]吲哚-2′[1′H]-酮,熔点:171-172℃。收率:60%。2./  将112.7g 5-乙氧基-茚满-2-酮加入到318ml二甲亚砜中,然后搅拌加入3.82g叔丁醇钾。搅拌所得悬浮液10分钟后,在40-45℃,用70分钟滴加172.1g丙烯酸甲酯。在上述温度下再搅拌混合物65分钟,然后,保持温度低于60℃,用30分钟加入161g叔丁醇钾。蒸馏出叔丁醇,将粘稠残余物倾入1780ml水中,用活性炭澄清溶液并过滤。在85℃浴中搅拌滤液。当其温度为68℃时(约25分钟),加入晶种,然后在最高81℃的温度下,再连续搅拌3小时。冷却混合物至室温,滤出沉淀,并用水充分洗涤。得到110.7g螺[(4-环己酮)-1,3′(5′-乙氧基)-[3H]吲哚-2′[1′H]-酮,熔点:184-186℃,所得产物适合用于下一步反应。收率:67%。3./  在135-140℃,将11.2g 5-乙氧基-茚满-2-酮和220ml原甲酸三乙酯搅拌20小时,然后真空蒸发反应混合物。得到17.2g油状1-(二乙氧基-亚甲基)-5-乙氧基-二氢吲哚-2-酮。其结构已被NMR证实。收率:92%。
在20-30℃,用1小时,向17.2g 1-(二乙氧基-亚甲基)-5-乙氧基-二氢吲哚-2-酮、1.5g叔丁醇钾和170ml甲苯的混合物中滴加12.6ml丙烯酸乙酯。再搅拌90分钟后,向反应混合物中加入50ml水,进行相分离,用水洗涤有机相,用硫酸钠干燥,真空蒸发。得到22.2g黄棕色结晶油状1-(二乙氧基-亚甲基)-3-(二-/乙氧基羰基乙基/)-5-乙氧基-二氢吲哚-2-酮,将其从110ml正己烷中结晶,得到15.1g结晶产物。熔点:82-83℃。收率:62%。
将15g1-(二乙氧基-亚甲基)-3-(二-/乙氧基羰基乙基/)-5-乙氧基-二氢吲哚-2-酮溶解于150m1甲苯中,搅拌,用10分钟向溶液加入7.2g叔丁醇钾。室温搅拌反应混合物2小时,然后加入水,进行相分离。用水洗涤有机相,用硫酸钠干燥,真空蒸发。得到10.2g棕色油状螺[(3-乙氧基羰基-4-环己酮)-1,3′(1′-二乙氧基-亚甲基-5′-乙氧基)-[3H]吲哚]-2′-酮。其结构已被NMR证实。收率:76%。
在室温下,在20ml 96%乙醇和0.5ml 2N盐酸混合物中搅拌4.05g螺[(3-乙氧基羰基-4-环己酮)-1,3′(1′-二乙氧基-亚甲基-5′-乙氧基)-[3H]吲哚]-2′-酮2小时,用冰水冷却反应混合物至5℃。过滤出沉淀的螺[(3-乙氧基羰基-4-环己酮)-1,3′(1′-甲酰基-5′-乙氧基)-[3H]吲哚]-2′-酮。熔点:133-136℃。收率:52%。将5g螺[(3-乙氧基羰基-4-环己酮)-1,3′(1′-甲酰基-5′-乙氧基)-[3H]吲哚]-2′-酮溶解于100ml乙酸中,向其中加入25ml 5N硫酸。搅拌回流反应混合物,然后真空蒸发。向残余物中加入水,用氢氧化钠溶液调节pH至7。得到3.1g固化的油状沉淀,其与用另一合成途径得到的螺[(4-环己酮)-1,3′(5′-乙氧基)-[3H]吲哚]-2′[1′H]-酮相同。熔点:139-140℃。收率:86%。

Claims (9)

1.一种制备通式I的螺[(4-环己酮)-[3H]吲哚]-2′[1′H]-酮衍生物的方法,其中,R1和R2独立地表示氢、C1-4烷基、C1-4烷氧基、C1-4烷硫基、C1-4全氟烷基、C1-4全氟烷氧基、C3-7环烷氧基、C3-7环烷硫基、苯氧基、苄氧基或硝基,
其特征在于,将通式II的二氢吲哚-2-酮衍生物,其中R1和R2定义同上,与能引入保护基的化合物反应,将得到的通式III化合物与丙烯酸C1-4酯偶合,式III中,R1和R2定义同上,A表示保护基,将得到的通式IV化合物环化,其中R1和R2定义同上,R3表示C1-4烷基,A表示保护基,消去通式V所示的酮酸酯的-COOR3和A保护基,其中R1和R2定义同上,R3表示C1-4烷基,A表示保护基,任选不分离通式IV和/或V和/或VI化合物。
2.权利要求1的方法,其特征在于,用2,3-二氢吡喃、原甲酸三乙酯或丙烯酸C1-4酯作为能引入保护基的化合物。
3.权利要求1-2的方法,其特征在于,在催化剂存在下进行通式II化合物,其中R1和R2定义同权利要求1,与能引入保护基的化合物之间的反应。
4.权利要求1的方法,其特征在于,在催化剂存在下进行通式II或III化合物,其中R1、R2和A定义同权利要求1,与丙烯酸C1-4酯之间的反应。
5.权利要求3-4的方法,其特征在于,用酸性或碱性催化剂作为催化剂,优选用对甲苯磺酸或碱金属醇盐作为催化剂。
6.通式III的化合物,其中,R1、R2和A定义同权利要求1。
7.通式IV的化合物,其中,R1、R2、R3和A定义同权利要求1。
8.通式V的化合物,其中,R1、R2、R3和A定义同权利要求1。
9.通式VI的化合物,其中,R1、R2和R3定义同权利要求1。
CNB008103151A 1999-07-15 2000-07-13 制备螺[(4-环己酮)-[3h]吲哚-2′[1′h]-酮衍生物的方法 Expired - Fee Related CN1149194C (zh)

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FR2740136B1 (fr) 1995-10-24 1998-01-09 Sanofi Sa Derives d'indolin-2-one, procede pour leur preparation et les compositions pharmaceutiques les contenant
GB9707800D0 (en) * 1996-05-06 1997-06-04 Zeneca Ltd Chemical compounds
FR2757157B1 (fr) * 1996-12-13 1999-12-31 Sanofi Sa Derives d'indolin-2-one, procede pour leur preparation et compositions pharmaceutiques les contenant
WO1999032489A1 (en) * 1997-12-23 1999-07-01 Alcon Laboratories, Inc. Muscarinic agents and use thereof to treat glaucoma, myopia and various other conditions

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HUP9902374A2 (hu) 2001-05-28
PL198521B1 (pl) 2008-06-30
EP1200404A2 (en) 2002-05-02
ATE238989T1 (de) 2003-05-15
BR0012473A (pt) 2002-04-02
JP2003505371A (ja) 2003-02-12
CN1149194C (zh) 2004-05-12
US20030212278A1 (en) 2003-11-13
SK286875B6 (sk) 2009-07-06
AU6308400A (en) 2001-02-05
EP1200404B1 (en) 2003-05-02
US6884895B2 (en) 2005-04-26
DE60002472D1 (de) 2003-06-05
HU9902374D0 (en) 1999-10-28
CZ2002147A3 (cs) 2003-02-12
CA2378201C (en) 2007-10-16
HRP20020143B1 (en) 2010-11-30
DE60002472T2 (de) 2004-02-26
HRP20020143A2 (en) 2003-10-31
CA2378201A1 (en) 2001-01-25
MXPA01013341A (es) 2002-08-12
WO2001005760A2 (en) 2001-01-25
HUP9902374A3 (en) 2002-11-28
US6573386B1 (en) 2003-06-03
ES2197106T3 (es) 2004-01-01
WO2001005760A3 (en) 2001-07-19
BR0012473B1 (pt) 2011-05-03
SK482002A3 (en) 2003-05-02

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