TWI461413B - 用於製備〔4-(2-氯-4-甲氧基-5-甲基苯基)-5-甲基-噻唑-2-基〕-〔2-環丙基-1-(3-氟-4-甲基苯基)-乙基〕-胺之新穎方法 - Google Patents

用於製備〔4-(2-氯-4-甲氧基-5-甲基苯基)-5-甲基-噻唑-2-基〕-〔2-環丙基-1-(3-氟-4-甲基苯基)-乙基〕-胺之新穎方法 Download PDF

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TWI461413B
TWI461413B TW099113599A TW99113599A TWI461413B TW I461413 B TWI461413 B TW I461413B TW 099113599 A TW099113599 A TW 099113599A TW 99113599 A TW99113599 A TW 99113599A TW I461413 B TWI461413 B TW I461413B
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methylphenyl
iii
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Zsolt Parkanyi
Janos Fazekas
Peter Miskolczi
Annamaria Molnar
Bela Agai
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Sanofi Aventis
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Description

用於製備[4-(2-氯-4-甲氧基-5-甲基苯基)-5-甲基-噻唑-2-基]-[2-環丙基-1-(3-氟-4-甲基苯基)-乙基]-胺之新穎方法
本發明之標的為用於製備式(I)的[4-(2-氯-4-甲氧基-5-甲基苯基)-5-甲基-噻唑-2-基]-[2-環丙基-1-(3-氟-4-甲基苯基)-乙基]-胺 之新穎方法
及該製備方法之新穎中間物。
式(I)化合物為用以製備式(VI)之[4-(2-氯-4-甲氧基-5-甲基苯基)-N-丙炔基-5-甲基-噻唑-2-基]-[2-環丙基-1-(3-氟-4-甲基苯基)-乙基]-胺的關鍵中間物
-其為具有潛在抗抑鬱及/或抗焦慮作用之已知CRF1(皮質激素(corticrotropin)釋放因子1)受體拮抗劑。式(I)之噻唑胺目前係利用Hantzsch合成以數個步驟製備(WO2001005776 Sanofi-Aventis)。到現在為止所使用之製備步驟(WO2001005776 Sanofi-Aventis)係從通式(II)之化合物開始
-其中X表示鹵素原子。然而,此化合物容易分解、其為刺激性的、其品質難以再現、其分離和處理困難。
我們的目的是要發現一種用於製備式(I)化合物的起始材料,其特徵為容易處理、可良好結晶、且可以高產率方便地製備。令我們驚訝地,我們發現:式(III)的2-氰硫基-1-(2-氯-4-甲氧基-5-甲基苯基)-丙-1-酮
為符合我們所有需求的起始材料。應用式(III)化合物的進一步利益為在特定條件下,也就是在相轉移觸媒存在下,其可在水性介質中從先前使用之通式(II)化合物容易地製備。此根據我們的發明之新穎方法是環保的,因為只有形成水性流出物,所使用之有機溶劑的量很小且該溶劑可再使用,所以該方法可以工業規模實施且其以高產率產生純產物。
酮衍生物(III)在水性條件下之製備是令人驚訝的,因為硫氰酸酯基團對水敏感,所以其容易轉化成異硫氰酸酯,或其會進行水解。因此,現有技術,其係在離子液體中(Tetrahedron Letters 46(2005)1489-1491)或在醇介質中(J. Indian Chem. Soc.,81(2004)786-788)製備,但是無論如何都沒有水。
本發明之標的為一種製備式(I)的[4-(2-氯-4-甲氧基-5-甲基苯基)-5-甲基-噻唑-2-基]-[2-環丙基-1-(3-氟-4-甲基苯基)-乙基]-胺之新穎方法
其中
a .) 使通式(II)之2-鹵-1-(2-氯-4-甲氧基-5-甲基苯基)-丙-1-酮
其中X表示鹵素,與鹼金屬-硫氰酸鹽在相轉移觸媒存在下反應,及
b.) 使如此獲得之式(III)的2-氰硫基-1-(2-氯-4-甲氧基-5-甲基苯基)-丙-1-酮
或其互變異構形式與式(IV)的2-環丙基-1-(3-氟-4-甲基苯基)-乙基-胺反應
為了製備式(I)化合物之適當光學活性異構物,我們必須開始從式(IV)之個別光學活性胺開始。
在根據本發明方法之一具體實例中,在步驟a.)中該反應係在由非質子溶劑和水組成之二元系中實施。
在根據本發明方法之一替代方法中,將通式(II)化合物-其中X有利地表示氯或溴基團,較佳溴基團,-溶解在非質子有機溶劑中且與鹼金屬-硫氰酸鹽-較佳硫氰酸鉀-之水溶液在相轉移觸媒-較佳TBAB(溴化四丁基銨)存在下反應。反應混合物係藉由在用水稀釋混合物之後分離有機相而進行處理。在所給定的情形中,在溶劑交換之後,式(III)化合物可以高產率充份結晶。
在一步驟b.)的變型中,將式(III)化合物加至式(IV)化合物中,以獲得具有有利雜質輪廓且於高產率之所要產物。為了達成最佳產率,持續至少一小時之另一段時間。在步驟b.)中有利地施用非極性非質子溶劑,較佳地甲基-環己烷或甲苯。步驟b.)較佳係在介於25℃和回流溫度之間的溫度範圍實施,最佳在回流溫度下實施。通式(II)化合物和式(IV)的胺,以及其製備係從專利申請案公開號WO2001005776得知的。
本發明之另一標的為新穎的式(III)化合物及其互變異構物,以及其製備。
關於化合物(III)之互變異構物,式(V)之5-(2-氯-4-甲氧基-5-甲基苯基)-4-甲基-[1.3]-亞氧硫雜環戊烷(oxathiol)-2-基胺
也為本發明之標的。
我們的方法進一步細節說明於下列實例中,但申請專利範圍不被限制於該等實例。
實例
實例1. 從在二氯甲烷(DCM)中之化合物(II)製備化合物(III)
291.5克 2-溴-1-(2-氯-4-甲氧基-5-甲基苯基)-丙-1-酮(II)被溶解在291克 DCM中,5.3克 TBAB(溴化四丁基銨)觸媒加至其中。
167克 KSCN被溶解在83.6克 水中。將水溶液加至DCM溶液中。
將所得二元系加熱至40℃(回流)並攪拌3-4小時。
反應伴隨鹽沈澱。將水加至中混合物中直到鹽溶解。分離下層水相,蒸發上層有機相,同時將870毫升 甲醇(MeOH)加至其中。
在冷卻時化合物(III)從甲醇溶液結晶。濾出結晶,用MeOH洗滌數次。
產率:90-95%
熔點:75℃(MeOH)
IR-光譜:2158 cm-1 (CN),1664 cm-1 (C=O)1 H-光譜(DMSO-d6 ,TMS):7.73(1H,s),7.14(1H,s),5.28(1H,q,J=7,2Hz),3.89(3H,s),2.16(3H,s),1.60(3H,d,J=7.2Hz)
13 C-NMR-光譜:194.7,160.9,132.6,131.5,126.3,125.5,113.5,111.4,56.7,49.4,18.8,15.8
實例2. 從在甲基-環己烷(MCH)中之化合物(II)製備化合物(III)
製備步驟係如化合物1中所述,但使用MCH取代DCM作為溶劑。在冷卻時化產物從MCH結晶。
產率:60%
實例3. 在胺存在下從在非極性溶劑中之化合物(III)製備化合物(V)
26.4克 化合物(III)(如化合物1.或2.中所述製備)被懸浮在52毫升 MCH中。
將於化學計量之胺(較佳苯甲胺)加至混合物中。
將混合物攪拌0.5-1小時(胺的結構影響反應時間)。獲得稠沈澱物,將其濾出且用甲基-環己烷洗滌數次。
產率:85%。
實例4. 從在作為溶劑之三級胺中之化合物(III)製備化合物(V)
製備步驟係如化合物3中所述,其差異為將化合物(III)懸浮在取代MCH作為溶劑之三乙胺中,且沒有將其他胺加至混合物中。
產率:85%。
熔點:106℃(EtOH)
IR-光譜:3253 cm-1 (NH),1679 cm-1 (C=N)1 H-光譜(DMSO-d6 ,TMS):7.30(1H,s),7.14(1H,s),3.86(3H,s),2.14(3H,s),1.88(3H,s)
13 C-NMR-光譜:163.1(s),158.9(s),138.9(d),133.0(s),131.4(s),125.3(s),118.3(s),111.8(d),111.5(s),56.0(t),15.3(t),11.6(t)
實例5. 從在甲基-環己烷(MCH)中之化合物(III)製備化合物(I)
26.3克 經單離之產物(III)被溶解在52毫升 MCH中。
將反應混合物加熱至85-90℃且加至19.2克 胺(IV)在MCH中的85-90℃溶液(20%)中。添加期間為2-4小時。添加之後,將反應混合物在85-90℃下攪拌1小時。冷卻粗產物(I)之MCH溶液且濾出沈澱之結晶。用小量的MCH覆蓋結晶產物。
產率:80%。
實例6. 從在MCH和MeOH中之化合物(III)製備化合物(I)
該製備步驟係如化合物5中所述,但在溶劑交換之後從取代MCH的MeOH結晶產物(I)。
產率:90%
實例7. 從化合物(V)製備化合物(I)
該製備步驟係如實例5和6中所述,但使用相同量的化合物(V)取代化合物(III)。
產率:85%

Claims (13)

  1. 一種製備式(I)的[4-(2-氯-4-甲氧基-5-甲基苯基)-5-甲基-噻唑-2-基]-[2-環丙基-1-(3-氟-4-甲基苯基)-乙基]-胺之方法, 其特徵為a.)使通式(II)的化合物 - 其中X表示鹵素-與鹼金屬-硫氰酸鹽在相轉移觸媒存在下反應,及b.)使如此獲得之式(III)的2-氰硫基(thioyanato)-1-(2-氯-4-甲氧基-5-甲基苯基)-丙-1-酮 或其互變異構形式與式(IV)的2-環丙基-1-(3-氟-4-甲基苯基)-乙基-胺反應
  2. 如申請專利範圍第1項之方法,其特徵為在步驟b.)中,將式(III)的酮加至式(IV)的胺中。
  3. 如申請專利範圍第2項之方法,其特徵為將式(III)的酮加至式(IV)的胺需要至少1小時。
  4. 如申請專利範圍第1-3項中任一項之方法,其特徵為在步驟a.)中,反應係在由非質子溶劑和水組成之二元系中實施。
  5. 如申請專利範圍第1-3項中任一項之方法,其特徵為步驟b.)係在非極性非質子溶劑中進行。
  6. 如申請專利範圍第5項之方法,其特徵為在步驟b.)中所使用之非極性非質子溶劑為甲基-環己烷或甲苯。
  7. 如申請專利範圍第1-3項中任一項之方法,其特徵為步驟b.)係在介於25℃和回流溫度之間的溫度下進行。
  8. 如申請專利範圍第7項之方法,其特徵為步驟b.)在回流溫度下進行。
  9. 如申請專利範圍第1-3項中任一項中所定義之方法,其特徵為在通式(II)中,X表示溴基團。
  10. 一種式(III)的2-氰硫基-1-(2-氯-4-甲氧基-5-甲基苯基)-丙-1-酮 及其互變異構物。
  11. 根據申請專利範圍第10項之式(III)化合物,其中該式(III)化合物的互變異構物為式(V)的5-(2-氯-4-甲氧基-5-甲基苯基)-4-甲基-[1.3]-亞氧硫雜環戊烷(oxathiol)-2-基胺
  12. 一種製備式(III)的2-氰硫基-1-(2-氯-4-甲氧基-5-甲 基苯基)-丙-1-酮之方法, 其特徵為使其通式(II)之衍生物, - 其中X表示鹵素-與鹼金屬-硫氰酸鹽在相轉移觸媒存在下反應。
  13. 一種製備式(I)的[4-(2-氯-4-甲氧基-5-甲基苯基)-5-甲基-噻唑-2-基]-[2-環丙基-1-(3-氟-4-甲基-苯基)-乙基]-胺之方法, 其特徵為以將式(III)的酮加至式(IV)的胺中之方式使式(III)的2-氰硫基-1-(2-氯-4-甲氧基-5-甲基-苯基)-丙-1-酮 與式(IV)的2-環丙基-1-(3-氟-4-甲基苯基)-乙基-胺反應
TW099113599A 2009-04-30 2010-04-29 用於製備〔4-(2-氯-4-甲氧基-5-甲基苯基)-5-甲基-噻唑-2-基〕-〔2-環丙基-1-(3-氟-4-甲基苯基)-乙基〕-胺之新穎方法 TWI461413B (zh)

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AU2010243362B2 (en) 2015-07-30
CN102414185B (zh) 2014-02-26
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BRPI1014627A2 (pt) 2015-08-25
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