CN1221545C - 制备4-(杂芳基-甲基)-卤素-1(2h)-2,3-二氮杂萘酮的方法 - Google Patents
制备4-(杂芳基-甲基)-卤素-1(2h)-2,3-二氮杂萘酮的方法 Download PDFInfo
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- CN1221545C CN1221545C CNB008175608A CN00817560A CN1221545C CN 1221545 C CN1221545 C CN 1221545C CN B008175608 A CNB008175608 A CN B008175608A CN 00817560 A CN00817560 A CN 00817560A CN 1221545 C CN1221545 C CN 1221545C
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- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
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- C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
- C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
- C07D403/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
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Abstract
本发明涉及4-(杂芳基-甲基)-卤素-1(2H)-2,3-二氮杂萘酮、特别是4-(4-吡啶基甲基)-1(2H)-2,3-二氮杂萘酮的制备方法,其特征在于2-苯并[c]呋喃酮基-3-三苯基磷盐在碱性助剂的存在下与4-吡啶醛反应,随后与肼反应,然后进行酸处理。该方法避免了已知方法中的技术问题、安全问题、以及环境问题。
Description
技术领域
本发明涉及制备4-(杂芳基-甲基)-卤素-1(2H)-2,3-二氮杂萘酮的方法。
背景技术
4-(杂芳基-甲基)-卤素-1(2H)-2,3-二氮杂萘酮,特别是4-(4-吡啶基甲基)-1(2H)-2,3-二氮杂萘酮,在制备2,3-二氮杂萘衍生物中是特别有价值的中间产物,而2,3-二氮杂萘衍生物的特征是具有有利的药理性质如抑制血管生成(WO 98/35958)、抑制cGMP磷酸二酯酶(EP 0 722 936)、抑制炎症和抗高血压作用(DE OS 2 021195),并由此提供了新的治疗可能性,特别是对于治疗癌症及心脏病。
根据已知的方法,制备例如4-(4-吡啶基甲基)-1(2H)-2,3-二氮杂萘酮是如下进行的:在约20℃下使邻苯二甲酸酐与4-甲基吡啶反应,然后再使得到的缩合产物(γ-pyrophthalone)与过量的肼在130℃下反应(DE AS 1 061 788)。这些方法的缺陷是产率低(<50%),产品质量差,而且主要是缩合反应要求非常高的温度,这使得难以应用于工业规模的生成中。
作为另一个替代方法,4-(4-吡啶基甲基)-1(2H)-2,3-二氮杂萘酮可如下制备:使2-苯并[c]呋喃酮与4-吡啶醛在甲醇存在下进行缩合,然后再使得到的2-(4(1H)-pyridinylidene)-4,5,6,7-四氢茚-1,3-二酮与大大过量(16当量)的肼在130℃下反应(WO 98/35958)。两步的总产率约为理论值的40%。在这些方法中,在高于肼的分解温度(约120℃)的温度下处理过量的致癌性肼,其本身就是一个非常严重的问题。在此情况下,在产物的处理和分离中使肼在空气(MAK 0.008ppm)和废水中维持非常低的界限值几乎是不可能的。
然而,由WO 99/32456中可知道其中肼过量约100倍而且反应温度接近于肼分解温度(约120℃)的反应。在工业规模上,此等方法本身就是非常成问题的。而且产率相对也低。
因此,希望得到4-(杂芳基-甲基)-卤素-1(2H)-2,3-二氮杂萘酮、特别是4-(4-吡啶基甲基)-1(2H)-2,3-二氮杂萘酮可行的制备方法,其可避免已知方法中的技术问题(在200℃下反应)、安全问题(将肼加热至130℃)、以及环境问题(大大过量的肼)。
现在,这些已知的缺陷可用本发明的方法来克服。
发明内容
本发明的目的是提供制备通式I之4-(杂芳基-甲基)-卤素-1(2H)-2,3-二氮杂萘酮的方法,
其中:R1=氟、氯、溴或氢,而
Ar=吡啶、吡嗪或者嘧啶基,
所述方法的特征在于,通式II之经取代的2-苯并[c]呋喃酮基-3-三苯基磷盐
其中:R1=氟、氯、溴或氢,
在碱存在下与通式III之醛反应,
Ar-CHO III
其中:Ar=吡啶、吡嗪或者嘧啶基,
然后与水合肼反应,并任选在酸性条件下处理。
具体实施方式
如果基团R1代表卤素,则可在吡嗪酮系统中的苯基环的任意位置上,也就是说在1-、2-、3-、或4-位。对于合适的Ar基团,可以是吡啶、嘧啶或者吡嗪基。合适的醛例如是2-、3-、或4-吡啶-醛,2-甲基-4-吡啶-醛,3-甲基-4-吡啶-醛,4-嘧啶-醛,5-嘧啶醛,3-吡嗪-醛或者4-吡嗪-醛。
因此,例如2-苯并[c]呋喃酮基-3-三苯基磷盐与4-吡啶醛在碱(碱性助剂)存在下反应,随后与水合肼反应,然后对反应混合物进行酸处理。具体而言是如下实现的:2-苯并[c]呋喃酮基-3-三苯基磷盐与4-吡啶醛在碱(碱性助剂)存在下于溶剂中反应,然后与1-1.1当量的水合肼反应,接着再用0.1-0.3当量的乙酸酐对反应混合物进行处理。
为分离产物,反应混合物与含水酸混合,蒸馏掉溶剂,过滤出沉淀的三苯基膦,然后使滤液碱化。在此情况下,沉淀出所希望的产物,而且在过滤和干燥后具有非常高的纯度和优异的产率(理论值的95-98%)。
对于反应中的溶剂,有机溶剂是合适的,例如四氢呋喃、二甲氧基乙烷、甲醇、乙醇或者二甲基甲酰胺。可使用的碱是有机碱,如胺,例如三乙胺、乙基二异丙基胺,或者是无机碱,如碳酸钾、碳酸钠、碳酸镁或者碱金属氢氧化物或碱土金属氢氧化物如氢氧化镁。2-苯并[c]呋喃酮基-3-三苯基磷盐反应时的反应时间在40℃下为1小时,而与肼的反应则是在50-70℃下7-14小时。
用作离析物的2-苯并[c]呋喃酮基-3-三苯基磷盐(溴化物和氯化物)可根据文献中已知的方法容易地得到(J.Organometallic Chem.1972,391;J.Org.Chem.1973,4164)。
与现有技术中已知的方法相比,根据本发明的方法的优点在于反应条件不苛刻,显著更高的产率(>90%),而且特别是可以使用化学计量量的肼。反应进行完全,而且在封闭的系统中,使得在处理之前,在反应混合物中没有检测出肼(单点反应)。因此,可以避免肼的致癌危险。
实施例
制备4-(4-吡啶基甲基)-2,3-二氮杂萘酮
将500g的2-苯并[c]呋喃酮基-3-三苯基氯化磷(1.160mol)悬浮在2250ml的四氢呋喃(THF)中。在5℃下,添加110.7ml的吡啶-4-醛(124.2g,1.160mol),然后在白色的悬浮液中计量加入161.7ml的三乙胺(117.4g,1.160mol)。添加完成后,在40℃下搅拌反应混合物1小时,然后与62.0ml的水合肼(63.9g,1.276mol)混合,并在70℃下搅拌8小时。接着加入32.7ml的乙酸酐(35.5g,0.348mol),并在20℃下继续搅拌2.5小时。反应混合物接着先与1500ml的水混合,然后与367ml的4M硫酸溶液混合。在真空中由该反应液中蒸馏出约2500ml的THF/水。使所得的悬浮液由玻璃料中过滤。滤液与50%的氢氧化钠溶液混合,直至pH为8.0(约185ml)。过滤出所沉淀的产物,用450ml的水洗涤,然后在60℃下干燥。得到264.2g的淡黄色固体(理论值的96%)。
熔点:193-194℃。EI-MS(M+H)+242。
可类似于本实施例制备其他衍生物。
Claims (4)
1、制备通式I之4-(杂芳基-甲基)-1(2H)-2,3-二氮杂萘酮的方法,
其中:R1=氟、氯、溴或氢,而
Ar=吡啶、吡嗪或者嘧啶基,
所述方法的特征在于,通式II之经取代的2-苯并[c]呋喃酮基-3-三苯基磷盐
其中:R1=氟、氯、溴或氢,
在有机碱或无机碱存在下与通式III之醛反应,
Ar-CHO III
其中:Ar=吡啶、吡嗪或者嘧啶基,
然后与1-1.1当量的水合肼反应,并任选在酸性条件下进行处理。
2、如权利要求1所述的方法,其中所述碱是胺或者碱金属氢氧化物或者碱土金属氢氧化物。
3、如权利要求1所述的方法,其中与水合肼反应后的反应混合物用乙酸酐或者乙酸进行处理。
4、如权利要求1-3之一所述的方法,其中与水合肼反应后的反应混合物用0.1-0.3当量的乙酸酐进行处理。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19963607.9 | 1999-12-23 | ||
DE19963607A DE19963607B4 (de) | 1999-12-23 | 1999-12-23 | Verfahren zur Herstellung von 4-(Heteroaryl-methyl) halogen-1(2H)-phthalazinonen |
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Publication Number | Publication Date |
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CN1413203A CN1413203A (zh) | 2003-04-23 |
CN1221545C true CN1221545C (zh) | 2005-10-05 |
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CNB008175608A Expired - Fee Related CN1221545C (zh) | 1999-12-23 | 2000-12-20 | 制备4-(杂芳基-甲基)-卤素-1(2h)-2,3-二氮杂萘酮的方法 |
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Country | Link |
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US (1) | US6891041B2 (zh) |
EP (1) | EP1242405B1 (zh) |
JP (1) | JP2003529555A (zh) |
KR (1) | KR100654265B1 (zh) |
CN (1) | CN1221545C (zh) |
AT (1) | ATE273972T1 (zh) |
AU (1) | AU772981B2 (zh) |
BG (1) | BG65387B1 (zh) |
BR (1) | BR0016634A (zh) |
CA (1) | CA2395407C (zh) |
CZ (1) | CZ20022146A3 (zh) |
DE (2) | DE19963607B4 (zh) |
DK (1) | DK1242405T3 (zh) |
EE (1) | EE04940B1 (zh) |
ES (1) | ES2223626T3 (zh) |
HK (1) | HK1055296A1 (zh) |
HR (1) | HRP20020605B1 (zh) |
HU (1) | HUP0300992A3 (zh) |
IL (2) | IL150017A0 (zh) |
MX (1) | MXPA02006224A (zh) |
NO (1) | NO321357B1 (zh) |
NZ (1) | NZ519285A (zh) |
PL (1) | PL200714B1 (zh) |
PT (1) | PT1242405E (zh) |
RO (1) | RO121211B1 (zh) |
RS (1) | RS50458B (zh) |
RU (1) | RU2250900C2 (zh) |
SI (1) | SI1242405T1 (zh) |
SK (1) | SK285522B6 (zh) |
UA (1) | UA72021C2 (zh) |
WO (1) | WO2001047912A1 (zh) |
ZA (1) | ZA200205853B (zh) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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IT1296984B1 (it) * | 1997-12-19 | 1999-08-03 | Zambon Spa | Derivati ftalazinici inibitori della fosfodiesterasi 4 |
US7151102B2 (en) * | 2000-10-30 | 2006-12-19 | Kudos Pharmaceuticals Limited | Phthalazinone derivatives |
GB0419072D0 (en) | 2004-08-26 | 2004-09-29 | Kudos Pharm Ltd | Phthalazinone derivatives |
UY30639A1 (es) * | 2006-10-17 | 2008-05-31 | Kudos Pharm Ltd | Derivados sustituidos de 2h-ftalazin-1-ona, sus formas cristalinas, proceso de preparacion y aplicaciones |
KR101598231B1 (ko) * | 2007-10-17 | 2016-02-26 | 쿠도스 파마슈티칼스 리미티드 | 4-[3-(4-시클로프로판카르보닐-피페라진-1-카르보닐)-4-플루오로-벤질]-2h-프탈라진-1-온 |
EP2346495B2 (en) * | 2008-10-07 | 2023-05-24 | Kudos Pharmaceuticals Limited | Pharmaceutical formulation 514 |
MX365950B (es) | 2013-03-13 | 2019-06-19 | Flatley Discovery Lab Llc | Compuestos de piridazinona y metodos para el tratamiento de la fibrosis quistica. |
CA2980028A1 (en) * | 2015-03-19 | 2016-09-22 | Clariant International Ltd | Biodegradable sugar-amide-surfactants for enhanced oil recovery |
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BE567431A (zh) * | 1957-05-07 | |||
GB1293565A (en) * | 1969-05-03 | 1972-10-18 | Aspro Nicholas Ltd | Aminophthalazines and pharmaceutical compositions thereof |
IE47592B1 (en) * | 1977-12-29 | 1984-05-02 | Ici Ltd | Enzyme inhibitory phthalazin-4-ylacetic acid derivatives, pharmaceutical compositions thereof,and process for their manufacture |
EP0634404A1 (en) * | 1993-07-13 | 1995-01-18 | Rhone Poulenc Agriculture Ltd. | Phtalazin derivatives and their use as pesticides |
ATE267174T1 (de) * | 1994-08-09 | 2004-06-15 | Eisai Co Ltd | Kondensierte pyridazinverbindungen |
JP3919835B2 (ja) * | 1994-08-09 | 2007-05-30 | エーザイ・アール・アンド・ディー・マネジメント株式会社 | 縮合ピリダジン系化合物 |
DE69720515T2 (de) * | 1996-12-18 | 2004-02-19 | Neurogen Corp., Branford | Isoquinolinamin und phtalazinamin derivate, die reagieren mit crf rezeptoren |
CO4950519A1 (es) * | 1997-02-13 | 2000-09-01 | Novartis Ag | Ftalazinas, preparaciones farmaceuticas que las comprenden y proceso para su preparacion |
IT1296984B1 (it) * | 1997-12-19 | 1999-08-03 | Zambon Spa | Derivati ftalazinici inibitori della fosfodiesterasi 4 |
ITMI981671A1 (it) * | 1998-07-21 | 2000-01-21 | Zambon Spa | Derivati ftalazinici inibitori della fosfodisterasi 4 |
ITMI981670A1 (it) * | 1998-07-21 | 2000-01-21 | Zambon Spa | Derivati ftalazinici inibitori della fosfodiesterasi 4 |
ITMI20000261A1 (it) * | 2000-02-16 | 2001-08-16 | Zambon Group | Processo per la preparazione di piridiniliden-ftalidi |
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