TWI288642B - Preparation of N1-(2'-pyridyl)-1,2-propanediamine sulfamic acid and its use in the synthesis of biologically active piperazines - Google Patents
Preparation of N1-(2'-pyridyl)-1,2-propanediamine sulfamic acid and its use in the synthesis of biologically active piperazines Download PDFInfo
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Description
1288642 玫、發_議明 _ (發明說明應敘明··發明所屬之技術領域、先前技術、內容、實施方式及圖式簡單說明) 發明所屬之技術領域 本發明係關於一種製備N -芳基-六氫吡畊及其中間產物 之方法。 先前技術 發明背景 式A之六氫吡畊:
/ \ I
Ar-N N-CH-CH2--fsj N \
A 其中R爲低級烷基,Ar爲未經取代或經取代之芳基或雜 芳基,且Q爲氫、C0-(低級)烷基、C0-環烷基或C0-芳 基,而*表示爲有效的5 Η T, a受器結合劑之對掌中心。u . S . 專利案6,1 27,3 5 7號教示六氫吡畊衍生物在中樞神經系統 (CN S )失調之治療上是有用的,此等六氫吡畊之鏡像異構 物可展示對5 Η T, a受器之不同結合能力,因此,其效力、 選擇性及代謝效果可能爲不同。W 0 9 7 0 3 9 8 2號教示此等六 氫吡畊展現改良之5HT1A結合親和性及生物利用性之鏡像 異構物。因此,一種製作光學較佳六氫吡卩井之有效、操作 容易的、便宜及安全之替代方法是所欲的。 W09533725號教示一種合成—些式a之對掌六氫吡哄之 1288642 方法,其係藉由對應於具鏡像異構之純的2-(5-甲基-2,2-二氧離子基-1,2,3 -噚四氫噻1]坐-3 -基)批卩定之1 -芳基-六氫口比 畊之烷化作用來合成。W09533725號亦教示具1-芳基-六氫 吡畊之磺醯二胺(磺醯胺酯)之親核性環開口且由L · T.
Boulton, J. Chem. Soc.t Perkin Trans · 1, 1 9 9 9, 142 1 - 1 429 已知具各種一級和二級胺開口。 W097/37655 號及 Cignarella et al.,Farmaco Ed.
Sci.;3 1;1 976;194,196 討論 Nl-(2’-吡啶基)-l,2-丙二胺胺磺 酸之製備及反應。 發明內容 發明摘述 本發明爲一種式II之Nb(2’-吡啶基)-1,2-烷二胺胺_酸 之製法,其包含式I化合物與NH2R’反應,
其中R爲選自CVC3烷基所組成之群,R’爲η、Ci_c6镜 基、C3-C7環烷基、C2-C7醯基、C5-C1Q芳基C6-Cu#醯基、 (C3-C7)環烷基(〇vc6)烷基、二-(c3-c7)環烷基·( 、 院基、(C5-C1Q)芳基(CrCb)院基,及一 -(c5-CIQ)芳基 ( c, - C 6 )院基。本發明進一步包含式11化合物及其光擧 異構物。 本發明亦包括含有下列一或多個步騾之方法。 1288642 式π化合物可被氫化將R ’轉變爲Η,若其非爲Η,則 使用酸來水解以形成式Π I化合物。
其中R’ = H之式II化合物或式III化合物兩者中任一個 可與式IV化合物反應以形成式V化合物。
其中Ar爲二氫苯并二-8-羥睦啉基或苯并二-8-羥喹啉 基,或可選擇地由多至3個各自獨立選自鹵素、甲氧基、鹵 甲基、二鹵甲基及三鹵甲基取代基取代之苯基,以及L爲適 當基如鹵素(特別是氯或溴)、甲苯磺酸酯、甲磺醯酯或P-溴苯基-磺醯氧基。 式V化合物可與選自氯化芳醯基、溴化芳醯基及芳醯基 酸酐之芳醯化合物一起處理,在鹼基存在下,形成式VI化 1288642
其中芳基表示2芳香族基,其可選擇經多至3個取代 基各自獨立選自由鹵素原子、烷基、烷氧基、烷氧基羰基、 硝基、胺基、院基胺基、二院基胺基、鹵院基、二鹵院基、 三鹵烷基、腈及醯胺基所組成之每個不具有超過6個碳之取 代基。 本發明之一目標爲提供一種於製備N -芳基六氫吡哄上 有用之式II之新穎中間產物化合物。 本發明之進一步目標爲提供一種N-芳基六氫吡畊及其 中間產物之新穎製法。 本發明之另一目標爲提供一種式II化合物之新穎製法。 由在此所提供之發明詳細說明之仔細考量,以及所附之 申請專利範圍,本發明之其他目標及優點對於此項技藝中 彼等熟習此藝者將爲明顯的。 發明詳細說明 本發明之較佳具體實施例爲一種使用N1-(2’-吡啶基)-1,2-丙二胺胺磺酸製備N-芳基六氫吡畊之新穎製法,特別是 一種以其中芳基爲4-氰基苯基之式VI製備N-芳基六氫吡畊 -10- 1288642 之方法。本發明之另一較佳具體實施例爲一種製造Nl-(2’-毗啶基)-l,2-丙二胺胺磺酸之方法,一種新穎、容易於N-芳基六氫吡畊之製備中分離固體中間產物之方法,且由此 之新穎衍生物亦於N-芳基六氫吡畊之製備上是有用的。 本發明方法中之一些化合物含有一個非對稱碳原子,產 生此化合物之鏡像異構物,應了解本發明其包含之鏡像異 構物包括消旋混合物。具有鹼性氮之化合物可與許多不同 酸形成複合物(質子及非質子兩者)。本發明亦包括由與無機 酸或有機酸之加成反應所形成之容許鹽形式。無機酸如氫 氯酸(HCI)、氫溴酸(HBr)、氫碘酸(HI)、硫酸、磷酸、硝酸, 以及有機酸如乙酸、丙酸、檸檬酸、順丁烯二酸、蘋果酸、 酒石酸、苯二甲酸、丁二酸、甲磺酸、甲苯磺酸、萘磺酸、、 樟腦磺酸、苯磺酸是有用的。 在本發明之一較佳具體實施例中,A r爲二氫苯并二-8 -羥喹啉基之式V化合物在過多的氯乙醇存在下由苯胺之二 烷化來製備,經由造成羥基部分轉化成適當離去基,例如 Cl、Br、甲磺酸酯或甲苯磺酸酯:
可選擇地’ Ar爲二氫苯并二-8-羥喹啉基之式IV化合物由 苯胺與烷基鹵乙酸酯之二烷基化經由還原來製備。 -11 - 1288642
在本發明之一較佳具體實施例中,其中R爲CH3之式I化 合物以氨來打開,以鏡像中心之轉化,得到容易被分離固 體之N 1 - ( 2 ’ -卩比D定基)-1,2 ·丙二胺胺擴酸。在另一具體實施例 中,式I之磺醯胺酯以胺打開如苄胺或二苯甲基胺,以得到 相應之胺磺酸。此具體實施例說明如下:
〇 其中R’爲二苯甲基或苄基。 在本發明之另一較佳觀點,Nl-(2’-吡啶基)-1,2-丙二胺 胺磺酸與二甲磺醯酯對偶以形成六氫吡畊:
其中*代表非對稱碳鏡像中心。 胺磺酸部分亦可擔任在與二甲磺醯酯之對偶步驟之保 護基以形成六氫吡畊。在整個合成次序中,六氫吡哄化合 -12- 1288642 物之對掌性維持原封不動。 本發明提供一種於光學活性N,N ’ -二個經取 畊在一步驟中、立體選擇及匯聚一點的方法之 之Nl-(2’-吡啶基)-1,2-丙二胺胺磺酸。光學活他 經取代的六氫吡哄具有5·ΗΤ1Α(血淸素)受器 性。 在式IV化合物中’ L可爲任一適當離去基, 彼等熟習此藝者將可輕易地決定此發明之操作 適合的,此適合離去基之例包括氯基、溴基、 甲苯磺酸酯及ρ-溴苯基磺醯氧基。 在本發明反應中需要酸、鹼或溶劑之存在下 任何此項技藝中已知之適當酸、鹼或溶劑,彼 者將可輕易鑑別於此發明之操作中適合的溶劑 實施方式 下列實例用來說明本發明一些具體實施例, 釋爲本發明之限制範疇。給予於工業步驟之試 作爲說明目的且可以此項技藝中彼等熟習此藝 及溶劑來取代。 實例1:磺醯胺酯之二苯甲基胺打開 代的六氫吡 合成上有用 三Ν,Ν、二個 拮抗劑之活 此項技藝中 中哪一基是 甲磺酸酯、 時,可使用 等熟習此藝 、酸及驗。 但應不能解 劑及溶劑只 者已知試劑 -13 - !288642
VII 於式I磺醯胺酯(R=甲基)(8.0g,37mmol)之乙腈溶液 (64mL)中加入胺基一苯基甲院(8.1g,44mmol),在氬氣下 於室溫中將反應混合物攪拌2天,然後加熱至5 5 t維持8小· 時,將得到的懸浮液過濾,以Et20(40 mL)淸洗並空氣乾燥 以得到12 g( 8 2%)之上列灰白色固體之式VII化合物。 R,= 0.3 1 (1 0 : 1 chci3 : ch3oh); 'η NMR (DMSO) (5 9·77 (bs,lH,OH),7.15-8.0 (m,13H), 6.7-6.8 (m,1H),5.81 (bs,1H,NH),4.1-4.3 (m,2H),3.4 (m, 2H)5 1.3 (d5 J = 4.8 Hz5 2H); 13C NMR (DMSO) (5 155.2,146.5,137.4,136.4,129.4, 129.3, 129.2, 129.0, 128.8, 128.1, 127.8, 127.7, 127.5, 127.5, 126.3, 116.0, 114.8, 62.4, 57.3, 53.2, 50.1, 14.4; IR (KBr): u max 3 43 2, 3 05 7, 3 0 1 0, 293 1,283 6, 2663, 2508, 2 3 3 0,1 5 99,1 5 65,1 5 00,1 474,1 43 3 cm·1; CHN (經計算的)C 63.48 Η 5·79 N 10.57,CHN (經觀察的) C 63.3 8 H 5.74 N 10.52; MP = 203.5-20 8 〇C 0 -14- 1288642 實例2 :胺磺酸之氫化作用
VIII
式VII (5.0g,12mmol)之二苯甲基受保護的胺擴酸與10% Pd/C (2.1g)於EtOH(lOOmL)之混合物在室溫下之氫氣汽球 中被攪拌,2天後,反應混合物通過矽藻土床過濾,以熱 EtOH(100mL)淸洗並於真空中濃縮以提供l.98g(72°/◦)之灰 白色固體之式VIII化合物。1HNMR(DMSO) 58.17(d,J = 3 Hz,1H),7.5-7.9 (m5 5H),6.82 (t,J = 4.5 Hz,1H),4·03 (dd, J=10.8 Hz? 3.6 Hz? 1H)? 3.94 (dd5 J = 10.8 Hz, 5.7 Hz, 1H), 3.4-3.6 (m,1H) 1.18 (d,J = 5.1 Hz,3H);】3C NMR (DMSO)占 156.1, 146.8, 136.9, 115.7, 114.6, 50.1, 47.95 16.7; IR (KBr): u max 3426, 3137, 3073, 2980, 2518, 1629, 1588, 1520, 1465, 1 432,1 3 66,1 2 8 6,1 2 3 4,1197,1146,1117,1 063,1 042 cnT1; CHN (經計算的)C 41.6 Η 5·62 N 18.2,CHN (經觀察的)C 41.1 H5.49N 17.7;MP = 175.5-179 〇C。 實例3 :磺醯胺酯之氨打開 -15- 1288642
H03s 在2N之EtOH氨溶液(216mL,0.432mol)之式I磺醯胺酯 (R=甲基)(22g,O.llmol)之混合物,在比下之室溫中攪拌2 天,然後將混合物濃縮成其原始量,將混合物過濾,以 Et2O(5 0mL)淸洗並空氣乾燥成17g(72% )之式VIII胺磺酸之 灰白色固體。 實例4 :胺磺酸之水解
式 VIII 之胺磺酸(0.97g,4.2mm〇l)於 3N HCI(lOmL)溶液 在室溫下攪拌18h,之後,將此反應混合物以6 N NaOH(5mL) 鹼化至PH13-14並以Et20(3 X 40mL)提取,有機層被合倂; 以過多Na2S04乾燥、過濾並在真空中濃縮以得到0.49g(78%) 之黃色油狀Nl-(2’-吡啶基)-l,2-丙二胺。1H NMR(CD3OD)5 7.8-8.0 (m,2H),7.3-7.5 (m,2H),6.5-6.7 (m,2H),3·0-3.4 (m, 3H) -16- 1288642 實例5 :胺磺酸及二甲磺醯酯之對偶
在式X之二甲磺酸酯(30.5g,84mmol)於無水DMF(240mL) 之溶液中加入胺磺酸VIII(16.2g,70mmol)、碳酸鉀(3 1.0g, 224mmol)及溴化鋰(12.8g,147mm〇l),在比下將反應混合 物在80-8 3 °C之油浴中加熱18h,然後冷卻至室溫,並傾注 至3NHCl(4 00mL)及CHCl3 (2 00mL)之混合物中,在兩層被分 離之前將此混合物於室溫攪伴lh,水溶液層以 CHCl3(2x75mL)淸洗以移除少量極性不純物,然後以5N NaOH (250mL)鹼化成pH〜14,鹼性水溶液層然後以 CHCl3(3xl50mL)提取,經合倂的有機層以過多Na2SOjg 燥、過濾,然後在真空中濃縮得到23 g(92%)之如棕色糖漿 之式XI化合物。 實例6 :六氫吡畊化合物之製作 於式X二甲磺醯酯(57mg,0.14mmol)之無水乙腈(lmL) 溶液加入胺基吡啶(20mg,0.13mmol)、碳酸鉀(52mg, 0.38mmol)及溴化鋰(26mg,0.30mmol),在乂下將反應混 合物加熱以回流1 5h,然後在過濾通過矽藻土墊前冷卻至室 溫,然後以乙腈淸洗此墊。合倂之有機層以過多Na2S04乾 -17- 1288642 燥、過濾並在真空中濃縮得到5 2 g ( 1 Ο 5 % )之黃色油狀之六氫 吡 Π并 X I ( 9 2 % (面積。/。,g C / M S ))。 實例7 : 六氫吡哄二鹽酸鹽
於 /\ 氫 口比哄 XI (2 3 g , 6 5 mmol)力□入 1MHC1 之
EtOH(125mL,125mmol)溶液,此混合物在真空中濃縮,然 後溶解於CH3OH(25mL),緩慢加入Et20(l 5mL)。在室溫1 8h 後’形成灰白色固體,將此固體過濾,以冷E t Ο Η ( 5 m L)淸洗 並空氣乾燥以得到4.6g之式XI二鹽酸鹽化合物之灰白色固 體。在額外5天之後,更多固體形成,將其過濾,以冷 EtOH(5mL)淸洗並空氣乾燥得到額外3.7g之式幻二鹽酸鹽 化合物之灰白色固體。 實例8 :六氫吡畊化合物之醯化作用 -18- 1288642
於碳酸鉀(3.4g,24.6mm〇l)2H20(5mL)溶液中加入在實 例7中所製作之二鹽酸鹽(3.0 g,7.0mmol),隨後加入 EtOAc(17mL),在緩慢加入 4-(1.3g,7.9mmol)於 EtOAc(3.5 mL)之前,此混合物在〇-5°C冰浴15分鐘,lh後,TLC指出小 量起始材料’加入額外的4-氰苄醯基氯(100mg, 0.60 mmol),加入後lh,加入H2O(10mL),將兩層分離,有 機層以飽和NaCl溶液 (10mL)、H2O(10mL)提取,水溶液 層反而以EtOAc(2xlOmL)提取,經合倂的有機層以過量 Na2S04乾燥、過濾,在真空中濃縮以得到3.0g(88%)之式ΧΠ 之黃色泡沬之化合物。 實例9:苯并1,4-二氧陸圓苯胺成二酯之烷化作用
Et02c/^N /^^C〇2Et 將苯并1,4-二氧陸圓苯胺(3.0g,20mmol)、溴乙酸乙酯 -19- 1288642 (7.5mL,68mmol)、Hunig 氏鹼(12.5mL,72mmol)及 Nal(0.3g,2.0mmol)於甲苯(30mL)之混合物加熱回流,23h 後,將反應混合物冷卻至室溫,加入水(25 mL),分離兩層’ 水溶液層以甲苯(25mL)提取,經合倂的有機層以過多 Na2S04乾燥、過濾並在真空中濃縮成6.5g(100%)產量之棕 色油之二酯。】H NMR(CDC13) □ 6.70 (t,J = 8.1 Hz,1H), 6.3-6.6 (m,2H),4.1-4.3 (m,12H),1.2-1.3(m,6H)。 實例10:苯并1,4 -二氧陸圓二酯成爲二醇之還原作用
將二酯(248,74.3111111〇1)於丁1^(24〇1]11〇之混合物冷卻至 0-5°C,於LAH沉澱塊(9.9g,260mmol)前緩慢加入,維持反 應溫度低於1(TC,加入LAH後,將冰浴移除並連續在室溫 下隔夜攪伴,攪伴18h後,將反應混合物在乾冰/IPA冰浴中 冷卻至0:t5°C,緩慢加入水(l〇mL)至反應混合物,隨後加入 1 5 a q、氫氧化鈉(1 0 m L)及水(3 0 m L)。將所得到之混合物攪 拌3 0分鐘然後過濾,固體以THF( 100ml)淸洗。過濾物在真 空中濃縮得到14.5 g(81%)之式IV之二醇之濃稠淸澈油之 98%區域(LC-MS)純度。1HNMR(CDCl3)□6·88-6·70(m,3H)5 4.34-4.22 (m,4H),3.54 (t,J = 7·5Ηζ,4H),3.18 (t,J = 7.5Hz, 4H)。 實例Π:苯并1,4-二氧陸圓苯胺成爲二醇之二烷化作用 -20- 1288642 H〇,
OH 〇 將苯并1,4-二氧陸圓苯胺與2-氯乙醇(210mL,3.1mol)及 Hunig 氏鹼(105mL,0.6mol)之混合物力口熱至 120°C,12.5h 之後,停止加熱並使反應混合物冷卻至室溫,加入乙酸乙 酯(300mL)並以稀釋鹽水(1 X250mL)隨後以鹽水(2X75mL) 淸洗。所有水溶液層被合倂,以〖2(:03將pH値調整至7,且 溶液以乙酸乙酯反淸洗(2 X 100mL),然後合倂所有有機層 並以2N HC1(3 X 150mL)提取。結果之水溶液以固體1^20:〇3 中和至pH値爲7,並以乙酸乙酯(3 X 1 OOmL)提取,有機相 以Mg S04乾燥、濃縮並以甲苯(2 X 5 OmL)趕出以移除殘餘氯 乙醇,得到39.6g(80%)之暗油狀粗產物之94%區域(LC-MS) 純度。NMR (CDC13) 5 6.88-6.70 (m,3H),4.34-4.22 (m, 4H),3.54 (t,J = 7·5Ηζ,4H),3.18 (t,J = 7·5Ηζ,4H)。 在此未說明之本發明之許多變異將浮現於此項技藝中 彼等熟習此藝者,本發明未限制於在此說明之實施例及描 述,但包含於附件之申請專利範圍中及其類似物之範疇之 所有目標物。 -21 -
Claims (1)
1288642 ι » iMi ininifc 公告本I 拾、申請專利範圍 其 1 . 一種式II之Nl-(2’-吡啶基)-1,2-丙二胺胺磺酸之製法 包含式I與NH2R5反應,
其中R爲選自C「C3烷基所組成之群,R’爲H'CVG烷基、 c3-c7環烷基、c2-c7醯基、cvq。芳基C6-CM芳醯基、(C3-c7)環烷基(C「C6)烷基、二-(C3-C7)環烷基-(CVC6) 烷基、(C5-Ci。)芳基(c〗-c6)烷基,及二-(c5-c1())芳基 -((VC6)烷基。 2.如申請專利範圍第1項之製法,其中R爲甲基。 3 .如申請專利範圍第1項之製法,其進一步包含步驟 a)其中R’不是Η時,將式II化合物氫化將R’轉變成Η; 且 b)式II化合物之酸水解,其中R’爲Η,以形成式III化合 物 -22- 1288642
4.如申請專利範圍第3項之製法,其進一步包含式ΙΠ化合物 與式IV化合物反應形成式V化合物,
其中Ar爲二氫苯并二-8-羥喹啉基或苯并二-8-羥喹 基,或可選擇地由多至3個各自獨立選自鹵素、甲氧基、鹵 甲基、二鹵甲基及三鹵甲基取代基取代之苯基,以及L爲適 當的離去基。 5.如申請專利範圍第4項之製法,其進一步包含式V化合物 與選自氯化芳醯基、溴化芳醯基及芳醯基酸酐之芳醯化 合物在鹼基存在下,反應形成式VI化合物’
其中芳基表示〇6-012芳香族基,可選擇經多至3個各自獨 立選自由鹵素原子、烷基、烷氧基、烷氧基羰基、硝基、 -23- 1288642 胺基、院基胺基、二院基胺基、鹵院基、二鹵丨完基、三鹵 院基、腈及酿胺基所組成之每個不具有超過6個碳之取代基 取代。 6.如申請專利範圍第1項之製法,其進一步包含式„化合物 與式IV化合物反應形成式V化合物,
其中Ar爲二氫苯并二-8-羥喹啉基或苯并二羥口奎 基,或可選擇地由多至3個各自獨立選自鹵素、甲氧基、 鹵甲基、二鹵甲基及三鹵甲基取代基取代之苯基,以及L 爲適當的離去基。 7.如申請專利範圍第6項之製法,其進一步包含式v化合物 與選自氯化芳醯基、溴化芳醯基及芳醯基酸酐之芳醯化 合物在鹼基存在下,反應形成式VI化合物,
其中芳基表示2芳香族基,可選擇經多至3個各自獨 立選自由鹵素原子、烷基、烷氧基、烷氧基羰基、硝基、 胺基、烷基胺基、二烷基胺基、鹵烷基、二鹵烷基、三 -24- 1288642 鹵烷基、腈及醯胺基所組成之每個不具有超過6個碳之取 代基取代。 8·如申請專利範圍第7項之製法,其中芳基爲4-氰基苯基。 9·—種轉化式Π化合物,
其中R爲選自C^-Cs院基所組成之群,R’爲院基、 〇3-〇:7環烷基、c2-c7醯基、C5-CIQ芳基c6-cn#醯基、 (C3-C7)環烷基(C「C6 )烷基、二-(c3-c7)環烷基-(Ci-C6)烷基、(c5-c1())芳基(CVC6)烷基,及二-(c5-c】0) 芳基-(cvc6)烷基,成爲式III化合物
之方法, 該方法包含步驟: a) 其中R,不是Η時,將式11化合物氫化將R ’轉變成H ; 且 b) 式II化合物之酸水解,其中R,爲H,以形成式111化合 -25- 1288642 物。 ! 〇,如申請專利範圍第9項之方法,其中進一步包含式III化 合物與式IV化合物反應形成式V化合物,
其中Ar爲二氫苯并二-8-羥喹啉基或苯并二-8-羥卩奎啉 基,或可選擇地由多至3個各自獨立選自鹵素、甲氧基、 國甲基、二鹵甲基及三鹵甲基取代基取代之苯基,以及 L爲適當的離去基。 ! i .如申請專利範圍第1 0項之方法,其中進一步包含式V 化合物與選自氯化芳醯基、溴化芳醯基及芳醯基酸酐之 芳醯化合物在鹼基存在下,反應形成式VI化合物,
其中芳基表示C6-C12#香族基,可選擇經多至3個各自 獨立選自由鹵素原子、院基、院氧基、院氧基羰基、石肖 基、胺基、烷基胺基、二烷基胺基、鹵烷基、二鹵烷基、 Ξ鹵烷基、腈及醯胺基所組成之每個不具有超過6個碳 &取代基取代。 ^種包含式II化合物與式IV化合物反應形成式V化合 1288642 物之方法,
II Ν’ H〇3S R,HN
丄 R N Af—N f\|mi
NH V 其中Ar爲二氫苯并二-8-羥喹啉基或苯并二-8-羥喹啉 基,或可選擇地由多至3個各自獨立選自鹵素、甲氧基、 鹵甲基、二鹵甲基及三鹵甲基取代基取代之苯基,以及 L爲適當的離去基。 1 3 ·如申請專利範圍第1 2項之方法,其中進一步包含式V 化合物與選自氯化芳醯基、溴化芳醯基及芳醯基酸酐之 芳醯化合物在鹼基存在下,反應形成式V I化合物,
其中芳基表示C6-C12#香族基,可選擇經多至3個各自 獨立選自由鹵素原子、烷基、烷氧基、烷氧基羰基、硝 基、胺基、烷基胺基、二烷基胺基、鹵烷基、二鹵烷基、 三鹵烷基、膪及醯胺基所組成之每個不具有超過6個碳 之取代基取代。 14.一種式II化合物, -27- 1288642
其中R爲選自(VC3烷基所組成之群,R’選自Η、CVC6 烷基、C3-C7環烷基、C2-C7醯基、cvq。芳基(^-(^芳 醯基、(c3-c7)環烷基(CVC6)烷基、二- (c3-c7)環 烷基-(c「c6)烷基、(C5-C1())芳基(CVC6)烷基, 及二- (C5-CH)芳基-(CVC6)烷基, 及其光學異構物。 15.如申請專利範圍第14項之化合物,其中R’選自Η、苄 基或二苯甲基。 -28 -
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