TW200410971A - Improved method for making NEVIRAPINE - Google Patents

Improved method for making NEVIRAPINE Download PDF

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TW200410971A
TW200410971A TW092117662A TW92117662A TW200410971A TW 200410971 A TW200410971 A TW 200410971A TW 092117662 A TW092117662 A TW 092117662A TW 92117662 A TW92117662 A TW 92117662A TW 200410971 A TW200410971 A TW 200410971A
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cyclopropylamino
bromine
chlorine
methyl
reaction
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TWI270548B (en
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Robert Frederick Boswell
Franklin Gupton
Young-Sek Lo
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Boehringer Ingelheim Chemicals
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    • A61P31/00Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
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    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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    • C07D213/02Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
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Description

200410971 玖、發明說明: 技術領域 本發明為關於製備奈拿拉平之改良方法,及關於實施本 改良方法過程時所產生之數個新穎之中間體。 先前技術 奈早拉平為HIV反轉錄酶之非核#抑制劑,其係用於治 療人類感染HIV。奈韋拉平之化學名為環丙基令⑴二 氮-4-甲基-6H-二峨咬基[3,2_b:2,,3,_e][i,4]二吖庚因 酮。其結構式為: ·
奈早拉平取早已知之合成方法由哈格雷(Hargrave)等人 描述於美國專利第5,366,972號。所使用之合成方法描述於 以下之反應圖解1。 86005.doc 200410971
圖解1 在哈格雷等人的方法中,2-氯基菸鹼酸與氯化亞硫醯反 應,形成2-氯基菸鹼醯氯。其次,如圖解1所示,2-氯基菸 驗酿氯與2-氯4-甲基-3-吡啶胺反應,產生2-氯-N-(2-氯-4-甲基-3-峨呢基)_3_吡啶羧醯胺。此以環丙胺反應,得到 N-(2-氯-4_甲基_3_吡啶基)_2_(環丙基胺基)_>毗啶羰醯 胺。最後的步驟是環化,以產生出奈韋拉平,該反應來自 以氮化鋼處理最終之中間體。 由史克尼(Schneider)等人描述於美國專利第5,569,76〇號 《上述万法之改良,為現今所使用之奈韋拉平之商業製 k。於Θ合成 <改良中,以環丙胺與2_氯善(2_氯_心甲基 -34啶基)-3_峨啶羧醯胺反應,是在中和劑之存在下進行 的,該中和劑為週期表第 一主或第二次攔元素之氧化物或 86005.doc 200410971 鼠氧化物較佳使用之中和劑為驗土族金屬或鋅之氧化物 或氫氧化物,氧化j弓尤佳。 雖然由美國專利第5,366,972號提供之合成方法為目前 已知最佳’其無論如何具有數個明顯的缺點。首先,由於 環丙胺與2 -氯以-(2-氯甲基-3-吡啶基)-3-吡淀叛醯胺之 反應’進行於提高了的溫度(在130。至15(TC之間)及由於 — 環丙胺是如此高度揮發,該反應勢必進行於高壓反應槽。 , 其次’高於約145它,2-氯-N-(2-氯-4-甲基-3-吡啶基)-3-外匕嗓:叛SS胺變得熱不穩定,及讓反應混合物之溫度高於該 _ 溫度會有爆炸之風險。因此,必須慎重的小心控制反應混 合物之溫度’使維持於145°C以下,直到實質上全部該物 貝已反應消耗完。而維持如此嚴密控制該反應混合物之溫 度是困難的’而該反應為自己放熱反應使其控制更為困 難。第三’需要由過濾來除去中和劑。最後,由於副產物 之產生,合成之得率僅約25%。 因此’奈章拉平有需要更好的合成方法。 發明内容 本發明由提供奈韋拉平之合成滿足該需求,即較安全、 - 較咼之彳于率及比任何已知方法更經濟。 實施方式 本發明所提供之奈韋拉平改良方法,描述於以下之反應 圖解2中。 86005.doc 200410971
圖解2 於最初之反應步騾中,式
X
c^N 之2-鹵素-3-吡啶腈(1)與環丙胺(2)反應,產生2-(環丙基胺 86005.doc -10- 200410971 基…比卿),其中,x為氟、氯、澳或蛾原子,較佳 為氯或溴。該反應進行於升高溫度下之惰性、有機溶劑 中’含或不含水。適當的有機溶劑為〇1至^之直鍵或支鍵 心醇、四氫呋喃、二甲基甲酿胺、二甘醇二甲醚、甲苯、 及其類似物。較佳之溶劑為含或不含水之乙醇及卜丙醇。 視需要,有機或無機之驗,如三乙胺、二異丙基乙基胺、 磷酸神、碳酸鈉、碳酸奸及其類似物,可被添加作為酸清 除劑。該反應可於室溫與回流溫度之間進行,但較佳之溫 度為介於77°及1〇〇。〇之間。 然後,2-(環丙基胺基)-3_峨淀赌被水解,產生2_(環丙基 胺基)-3_^賴(4),#其依據所揭示之步職分離時, j要以兩性離子方式存在,因此被如圖解2來表示。水解 月J月月《刀離可思。孩腈水解或叛酸可利用強酸或強驗 溶液’依習用之方式進行。水解較佳為利用過氧化氯及強 驗,如氫氧化鋼或氫氧化钟之水性混合物,或強驗,如氯 氧化納或氫氧化卸,及⑴個碳原子之醇的水性混合物來 進行。最佳之水解為利用水性的卜丙醇及氫氧化却來進 行。加熱至迴流會加速水解之速率。 然後2·(環丙基胺基)_3_峨淀叛酸由反應介質中被分離出 來。可由調整PH至等電點而方便地達成,該等電點於大約 pH 6可達到。由此產生兩性離子,該離子沈澱,然後以過 濾私^分開及乾燥。若水性醇及鹼用於處理水解,該醇最 先由蒸餾除去。 其/人,垓2-(環丙基胺基)-3-吡啶羧酸用氯化劑處理,而 86005.doc -11- 200410971 產生2-(環丙基胺基)-3-吡啶羰基氯(5)。適當的氯化劑為例 如,氯化亞硫酿、氯氧化磷、三氯化磷、五氯化磷、碳酿 氯及草si氯。氯化反應依熟諳有機合成技藝者已知之方式 進行。通常,較佳為將羧酸(4)與氯化劑回流,該氯化劑或 以純的方式使用,或以與適當的非質子性溶劑如甲苯、乙 腈、四氫呋喃或其類似物所成之溶液來使用。較佳為以純 氯化亞硫醯回流來進行氯化反應,任何多餘的氯化亞硫醯 可在後頭方便地以蒸發來除去它。由於大部分氯化劑產生 鹽酸,該反應步驟之產物(5)在圖解2中,被描述為鹽酸鹽。 其次,2-(環丙基胺基)_3_吡啶羰醯氯(5)與式
< 2-_素-4-甲基-3-吡啶胺(6)反應,其中,X為氟、氯、溴 或碘原子,較佳為氯或溴。最佳之反應劑為2-氯-4-甲基 吡哫胺。產生N-(2- _素-4-甲基-3-吡啶基)-2-(環丙基胺 基)-3-吡啶羰醯胺(7),其中,χ為氟、氯、溴、或碘原子, 較佳為氯或溴。因為會與吡啶胺反應,必須先除去任何殘 田之氯化別。务使用咼度揮發性之氯化劑如純氯化亞硫 醯,則可用蒸發除去以留下固體的鹽酸鹽(5)。若氯化反 應,在溶劑中進行,則使用高度沸騰之溶劑較佳,以便氯 化劑可用蒸發來除去,留下溶於溶劑中之鹽酸。在任何情 況下 4鹽敗鹽(5)被維持於無水的條件下。該鹽酸鹽(5) 86005.doc -12- 200410971 與峨淀胺(6)在溶解於適當的無水液挪 琍,如乙腈、四氫呋 喃、二甘醇二甲醚、二甲基甲醯胺、_ ^ — τ烷、二氯甲烷、 或甲豕下被反應。任意的驗,不管有機 戌及播機,如三乙胺、 二異丙基乙胺、磷酸卸、磷酸氫J甲、难 ^ 灭鉍鈉、氫氧化鈉、 氫氧化钾、或其類似物,可被添加於 万、反應混合物中作為酸 清除劑。該反應速率可由加熱至溶劑之沸點而增加。 最後,將μ胺⑺環化以產生奈章拉平。該環化反應可 在-3〇。〇至13〇1之間由在惰性無水有機溶劑,如二甘醇二 甲醚、甲苯、或四氫吱.喃之強驗例如,氫化麵(制)或六 甲基二矽氨烷鈉(NaHMDS)來處理該羧醯胺(7)而誘發。 以環丙胺來反應2-氯-3-吡啶腈,而合成中間體2_(環丙基 胺基)-3-说淀腊,見於G. H. Hardtmann等人所發表於j Med. Chem. 1974,17,636之論文。 中間體,2-(環丙基胺基)_3_吡啶羧酸(4)與2_(環丙基胺 基)-3-吡啶羰醯氯(5)被認為新穎,因此,被視為本發明之 一部分。 最好使用2-氯-3-吡啶腈作為起始材料(1),因為合成該物 質為已知,及市面上有售。另一素_3_吡啶腈可由相似 之方式容易地被合成。 環丙胺,起始材料(2)亦為市面上有售。 最好使用2-氣-4-甲基-3-吡啶胺作為反應物(6),因為合 成該物質見於美國專利第6,399,781號;第5,686,618 ;第 5,668,287 ;第 5,654,429 及第 5,200,522 號。另一 2-鹵素冬 甲基-3-吡啶胺可由相似之方式容易地被合成。 86005.doc -13- 200410971 以下實施例更描述利用本發明所提供之改良方法,製備 奈韋拉平。雖然每一步騾之反應順序可先分離出前面步驟 之產物來進行,部分之反應步騾可在單一反應槽中逐次地 進行,不需分離前步騾所形成之中間體,因此可減少由於 容器、時間、清掃及勞力之相關成本。以下實例1至6描述 每一步騾完成時所形成之中間體是被分離的。實例7及8描 述部分反應步騾可在單一反應容器中,逐次進行,不需分 離前步騾所形成之中間體。 實例1,製備2-(環丙基胺基)-3-吡啶腈 於裝置有機械攪拌器、溫度控制器、濃縮器及添加漏斗 之反應瓶中,加入2-氯-3-π比淀腈(69.25 g,0.50 mol)、300 ml的乙醇及200 ml的水。一面攪:拌,以3 0分鐘以上的時間, <3 0°C之溫度下滴加環丙胺(114 g,2.0 mol)。當完成添加, 該攪拌中之反應混合物,加熱至回流溫度2 0小時。將反應 混合物冷卻至60°C,然後利用水抽吸真空之真空蒸餾,將 3 50 ml過剩之環丙胺及乙醇除去。該留下之水溶液冷卻至 室溫,放置過後。以過濾來收集固體產物,以水濕潤滤餅。 產量為81.51 g(理論產量為79.5 g)。 實例2,製備2-(環丙基胺基)-3-吡啶羧酸(兩性離子) 將45%水性KOH溶液(187 g,1.5 mol)充填入由實例1之 產品及300 ml之1-丙醇之混合物中。將該混合物以回流溫 度加熱約5小時,直到以TLC分析顯示,該腈被完全水解。 將反應混合物冷卻至室溫,以94 g的水處理,以便以共沸 蒸鶴來除去1 -丙醇。將大約3 3 0 g之水/ 1 -丙醇共浠液在62 -14- 86005.doc 200410971 °C及21.1英吋水銀柱高之氣壓下蒸餾掉。加入水(130 g)於 該混合反應物,冷卻至5-10°C。以溫度能維持於30°C以下 之速率來加入濃鹽酸(148g,1.5 mol)。約80-90%之酸加入 後,兩性離子開始沈澱析出,使得該混合物很稠。當全部 酸添加完畢,以過濾來收集固體產物,利用90 ml冷水洗反 應容器至漉餅上。將該產物乾燥得到6 8.12 g之兩性離子。 實例3,製備2-(環丙基胺基)-3-吡啶羰醯氯 將氯化亞硫酿(25 ml,40.8 g,0.343 mol)以細流充填於 乙腈中由實例2所得之9:00 g,0.048 mol 2-(環丙基胺基)-3-叶匕淀複酸。該混合物於回流溫度下加熱3 0分鐘。將該混合 物放冷,於40°C / 23英叶水銀柱高之壓力下將氯化亞硫酉蠢 蒸發掉,直到罐内容物變稠。加入甲苯(25 ml),繼續於40 °C將氯化亞硫醯及甲苯蒸發,直到約一半之液體被蒸發 掉。所剩溶液放冷,攪拌以促進結晶。將庚燒(2 5 m 1)於 攪拌中加入於該混合物,於一大氣壓的氮下將該混合物過 濾以得到該標題化合物。 實例4,製備N-(2-氯-4-甲基-3-吡啶基)-2-(環丙基胺基)-3-吡啶羰醯胺 將 2-氯-4-甲基-3-吡啶胺(5.70 g,0.040 mol)溶於 10 ml 乙腈之溶液,以快速滴入充填於由實例3來之鹽酸、磨碎 的無水鱗酸钾(8.49 g,0.04 mol)及40 ml乙腈所成之混合物 中。該反應混合物於50°C加熱20小時,反應過程以HPLC 分析來監視。當反應完全,將反應混合物冷卻至室溫,以 50 ml水處理,而得到具有pH約4.5-5之溶液。將該混合物 -15 - 86005.doc 200410971 添加烯HC1溶液,使酸化至pH 1,於室溫下攪拌30分鐘。 將該反應混合物過遽以除去任何不溶物,將滤液以稀氫氧 化鈉溶液鹼化至pH 9-10,在室溫下攪拌30分鐘。然後將混 合物添加稀鹽酸酸化至pH 7-8,而於溶液頂形成暗油狀 層。水被加入,因為此舉在過去相似特性之實驗已觀察到 可促進結晶。油層於隔夜攪拌中緩慢結晶。收集固體產 物,於50°C真空烘箱中乾燥以得到9.37g之標題化合物。 實例5,利用六甲基二矽胺烷鈉製備11-環丙基-5,11-二氫 -4_甲基-611-二吡啶基[3,2-13:2’,3’4][1,4]二吖庚因-6-酮(奈 韋拉平) 將裝置有磁揽掉器、溫度控制熱電偶、添加漏斗、及含 油泡供排除周遭空氣的冷凝器之反應三角瓶,以氮氣惰性 化,以3.02 g(0.010 mol)由實施例4來之N-(2-氯-4-甲基-3-吡啶基)-2-(環丙基胺基)-3-吡啶羰醯胺及30 ml無水THF充 填。將六甲基二矽胺烷鈉(NaHMDS)溶於THF(12.7 ml, 0.025 mol)之40%溶液滴加入,使反應混合物之溫度維持於 不超過30°C。當完成添加NaHMDS溶液,將反應混合物加 熱至回流溫度(約63-66°C)。當該反應完成(以HPLC分析), 將混合物冷卻至室溫。以1.55 g(0.050 mol)之甲醇及0.45 g 水(0。025 mol)處理反應混合物。於25-30英吋汞柱之氣壓, 50-60°水浴溫度下之旋轉蒸餾器中,濃縮該混合物。將重 4。44 g之殘渣產物以50 ml水研磨,由添加10%HC1溶液,將 該pH 10-12溶液酸化成pH 3。以過濾來收集固體產物,以 10 ml水洗濾餅3次。將該濾餅在50-60°C之真空烘箱中乾燥 -16- 86005.doc 200410971 以取得奈拿拉平。 實例6,利用氫化鈉製備丨丄·環丙基^丨二氫-心甲基-抓 二吡啶基[3,2讣:2,,3,^][1,4]二吖庚因_6_酮(奈韋拉平) 私’、有攪拌备、溫度控制熱電偶、添加漏斗及含油泡以 排除空氣之冷凝器之5〇〇 ml 4NRB三角瓶,以氮氣惰性 化以i於磺油泥之60%氫化鈉15.00 g及120 ml之二甘醇 一甲醚充填。將混合物加熱至130°c,以滴加41.7 g (0.138 m〇l)由實例4之N-(2-氯-4-甲基-3-吡啶基)-2_(環丙基胺 基>3-峨啶羰醯胺,於8〇它溶於7〇 ml二甘醇二甲醚所得之 溶液處理。將該反應混合物於130°C加熱,直到氫氣停止 發生。混合物冷卻至室溫,小心滴加水(6.75 g)。當氫的發 生停止’另加1 〇〇 ml水。加入醋酸(2〇 mi)以降低混合物之 pH從11-13到約7。另加1〇〇 ml水,將反應混合物於室溫條 件下攪拌30分鐘,以便產物結晶。以過濾收集固體產物, 濾、餅以100 ml水洗,繼而以50 ml環己燒來除去從礦油一氫 化鈉泥中任何殘餘礦油。將濕餅於50°C之真空烘箱中乾燥 18小時,以取得35 58 g的奈章拉平 實例7,由2 -氯-3-峨淀腈,於單鍋f中合成2-(環丙基胺基)-3-吡啶羧酸 -17- 86005.doc 200410971
—NH2, Et3N
CT Ο) 1. KOH, n-PrOH / 2. HCI n-PrOH, H20
N NH (3)
CN
將具有攪拌器、冷凝器、溫度控制熱電偶及添加漏斗之 一公升4NRB三角瓶,以2 -氯-3-外匕淀腈(27.70 g,0.20 mol) 充填,繼而充填120 ml之1-丙醇及80 ml之水。將三乙胺 (20.2 g 9 0.20 mol)—次添加,繼而以2分鐘以上的時間添 加環丙胺(17.10 g,0.30 mol)。以回流(86-87°C )加熱反應 混合物,2·5小時後,薄層色層(TLC)分析(矽膠,MTBE移 動相)顯示有一些產物形成。回流攪拌16小時後,TLC分析 顯示殘留少量的起始物。HPLC分析顯示含22%起始物,75% 2-(環丙基胺基)-3-吡啶腈。另再添加0.1 mol(10.1 g)的三乙 胺(共30。3 g,0·30 mol的三乙胺)及0.03 mol的環丙胺(1.70 g),該混合物繼續於回流再加熱3小時。HPLC分析顯示殘 留1 5%的起始物。另再加4。0 g的環丙胺(共0.40 mo 1)混合物 於回流另加熱18小時。於時間終了,HPLC分析顯示含2。9% 之起始物。 將氫氧化钾(33.6 g,0.60 mol)加入,混合物於真空下加 -18- 86005.doc 200410971 熱至約40°C約15分鐘以除去任何揮發性之胺。然後將兮混 合物於大氣壓下回流加熱5小時,以便水解該腈成為複 酸。加水(80 ml),將正丙醇蒸發作為與水之共沸液(共沸沸 點為87.7X:,28.3%水,717%正丙醇)。當蒸餾最高溫增加 至92°C,停止蒸館,反應混合物放冷。 以冰甲醇浴將該反應混合物冷卻至約丨〇它,滴加5〇 (59.2 g)的37%HC1溶液,並維持該反應混合物不超過25 °C。加完所有HC1及攪拌約2分鐘後,2_(環丙基胺基)_3_吡 哫羧酸開始作更久的結·晶,而產物成為餅狀。加水(丨〇〇 ml) 以瓦解固體塊,使混合物成可攪拌。約3〇分鐘後,以過濾 收集該固體。濃縮濾液以取得另一固體。以抽吸空氣乾燥 約2小時後,該濕餅固體重23 〇2 g。hPlC顯示含97%的 2-(環丙基胺基)-3-吡啶羧酸及濃度1 ·8%與1 ·3%的兩支小而 不明的不純物尖峯。該固體於5(rc真空烘箱中乾燥65小時 而得到18.1 9 g。 貫例8,由2-氯-4-甲基-3-吡啶胺及(環丙基胺基)-3-吡啶 羧酸(兩性離子)單鍋合成N-(2-氯_4_甲基毗啶基)-2-(環 丙基胺基)-3-峨淀羰醯胺
86005.doc -19- 200410971 將裝置有機攪拌器、冷凝器、添加漏斗及溫度控制熱電偶 之250 ml 4 NRB三角瓶以2-(環丙基胺基)-3-吡啶羧酸(18。46 g,0· 1 0 mol)充填。將氣化亞硫酿(22 ml,0.30 mol)以細流在 攪拌中加入反應三角瓶中,並將該混合物熱至回流32分鐘。 將反應混合物冷卻,冷凝器以真空蒸餾頭替換。將氯化亞硫 醯在40°C,23英吋之汞柱真空下蒸發掉,直到蒸餾壺之内容 變稠。加入甲苯(30 ml),繼續蒸餾直到約大部分之液體被蒸 發掉。加入另一 30 ml之甲苯,約一半的溶劑在真空中被蒸 發掉。將乙腈(60 ml)加入於該殘留混合物。滴加2-氯-4-甲基 -3-吡啶胺(11· 4g,0.080 mol)於40 ml乙腈之溶液,將該反應 混合物加熱至50°C,並攪拌過夜。於加入2-氯-4-甲基-3-吡 啶胺後,仔細地將壓碎的磷酸鉀加入。1 6小時後,於50°C, 將100 ml水加入於攪拌的反應混合物中(pH 4-5)。將反應混 合物過濾以除去少量之不溶物。將濾液(2層)以50%之氫氧化 鈉水溶液鹼化至pH 10-11,然後往回酸化至pH 8。由HPLC 分析,大部分產物在甲苯層中被發現。以300 ml的稀HC1溶 液(pH 1)萃取該甲苯層。利用10% NaOH水溶液將該水性酸層 驗化至pH 8,而導致由研磨而缓緩結晶之油層分離出。於置 超過2天後,收集固體產物,於50°C真空乾燥,而得到21.40 g黃褐色之標題化合物。 86005.doc -20-

Claims (1)

  1. 200410971 拾、申請專利範圍·· 1 · 一種製備奈韋拉平之方法,其包括以下步驟: Ο)將式
    之素3-吡啶腈與環丙胺反應,產生2_(環丙基胺基)_3_ 吡啶腈,其中X為氟、氯、溴、或碘原子,較佳為氯或 溴; - (b) 水解2-(環丙基胺基)-3-吡啶腈,產生2-(環丙基胺 基)-3-吡啶羧酸; (c) 由反應介質中將2-(環丙基胺基)-3-吡啶羧酸分離 出; (d) 以氯化劑處理2-(環丙基胺基)-3-吡啶羧酸,產生 2_(環丙基胺基)-3-吡啶羰醯氯; (e) 將2-(環丙基胺基)-3-吡啶羰醯氯與式
    之2-_素-4-甲基-3-吡啶胺反應,其中X為氟、氯、溴或 碘原子,較佳為氯或溴,來製造式
    86005.doc 200410971 之N-(2-鹵素-4-甲基-3-吡啶基)-2-(環丙基胺基)-3-峨淀 叛酿胺,其中X為氟、氯、溴或換原子,較佳為氯或溴’ 及 (f)以強鹼處理,將N-(2-鹵素-4-甲基-3-吡啶基)-2-(環 丙基胺基)-3-吡啶羧醯胺環化,得到奈韋拉平。 2. 一種2-(環丙基胺基)-3-吡啶羧酸[BI49]之化合物。 3. 一種2-(環丙基胺基)-3-吡啶羰醯氯[BI50]之化合物。 4- 一種製備2-(環丙基胺基)-3-吡啶羧酸之方法,該方法包 括以下步騾:
    (a)將式々N 之2-鹵素3-吡啶腈與環丙胺反應,產生2-(環丙基胺基)_3_ 外匕淀腈,其中X為氯^、氯、溴、或琪原子,較佳為氯或 溴;及 (b)水解2-(環丙基胺基)-3-吡啶腈,產生2_(環丙基胺 基)-3-吡啶羧酸。 5。 一種製備式
    之N-(2-鹵素甲基_3_吡啶基)-2_(環丙基胺基)_3_吡啶 羧醯胺之方法,其中X為氟、氯、溴、或碘原子,較佳 -2 - 86005.doc 200410971 為氯或溴,該方法包括以下步驟: (a) 以氯化劑處理2-(環丙基胺基吡啶羧酸,產生 2-(環丙基胺基)-3-吡啶羰醯氯;及 (b) 將2-(環丙基胺基)-3-p比淀羰酿氯與式 CH.
    h2 之2-鹵素-4-甲基-3-吡啶胺反應,產生N-(2-函素-4-甲基 -3-吡啶基>-2-(環丙基胺基)_3_吡啶羧醯胺,其中X為氟、 氯、溴或碘原子,較佳為氯或溴。 6· —種製備N-(2- _素-4-甲基-3-吡啶基)-2-(環丙基胺 基)-3-吡啶羧醯胺之方法,該方法包括將2-(環丙基胺 基)-3-吡啶羰醯氯與式
    之2·鹵素-4-甲基-3-吡啶胺反應,其中,X為氟、氯、溴 或礎原子,較佳為氯或溴。 86005,doc 200410971 柒、指定代表圖: (一) 本案指定代表圖為:第()圖。 (二) 本代表圖之元件代表符號簡單說明: 捌、本案若有化學式時,請揭示最能顯示發明特徵的化學式:
    86005.doc
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