TWI614255B - 環狀巨環內酯系化合物之分離方法 - Google Patents

環狀巨環內酯系化合物之分離方法 Download PDF

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TWI614255B
TWI614255B TW102124290A TW102124290A TWI614255B TW I614255 B TWI614255 B TW I614255B TW 102124290 A TW102124290 A TW 102124290A TW 102124290 A TW102124290 A TW 102124290A TW I614255 B TWI614255 B TW I614255B
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tacrolimus
compound
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ascomycin
silica gel
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Yuya Tsukuda
Keita Muramatsu
Hironori Sasaki
Hirohide Nakamura
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Godo Shusei Co Ltd
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Abstract

本發明提供一種不使用銀化合物而即便混合存在有與目標環狀巨環內酯系化合物同樣地具有雙鍵之化合物亦可進行分離的方法。
本發明之自含有環狀巨環內酯系化合物及1種以上其類似化合物之混合物分離環狀巨環內酯系化合物之方法的特徵在於:將該混合物施加至不對稱性識別劑固定化矽膠管柱層析儀。

Description

環狀巨環內酯系化合物之分離方法
本發明係關於一種作為醫藥品等較為有用之環狀巨環內酯系化合物之分離精製方法。
環狀巨環內酯系化合物之中,存在許多如紅黴素等抗生素、他克莫司等免疫抑制劑等作為醫藥品較為有用的物質。該環狀巨環內酯系化合物大多提取自微生物之培養物。此種培養物中,除目標之環狀巨環內酯系化合物以外,亦含有大量類似物質,因此報告有各種僅分離目標化合物之技術。
例如,作為天然化合物之古典精製方法,存在如下者:將受檢液施加至擔載有銀之矽膠管柱層析儀,而將骨架上具有雙鍵之化合物與骨架上不具有雙鍵之化合物分離(非專利文獻1、2等)。
他克莫司及其類似物質存在側鏈骨架中具有雙鍵之成分與側鏈骨架中不具有雙鍵之成分。因此,報告有如下技術:使強酸性離子交換樹脂擔載銀,並使他克莫司及其類似物質之混合物流入,而將他克莫司與類似物質分離(專利文獻1)。又,報告有如下技術:使混合物吸附於非離子性吸附樹脂,以含銀離子之含水溶劑等將他克莫司與類似物質分離(專利文獻2)。
[先前技術文獻] [專利文獻]
[專利文獻1]日本專利第3750527號公報
[專利文獻2]日本專利第3925198號公報
[非專利文獻]
[非專利文獻1]物質之單離與生成,大竹他p70(東京大學出版會,1976)
[非專利文獻2]J. Chromatograph. 69, 207 (1972)
然而,上述專利文獻記載之技術對側鏈具有雙鍵之化合物與側鏈不具有雙鍵之化合物的分離有效,但對與他克莫司同樣地於側鏈上具有雙鍵之化合物與他克莫司的分離無效。已知:實際上含有他克莫司之培養物中含有與他克莫司同樣地於側鏈上具有雙鍵之化合物。又,由於使用銀化合物,故而必須於後處理之步驟中進行完全去除銀之操作。廢液處理等環境方面亦必須考慮。
因此,本發明提供一種不使用銀化合物而即便混合存在有與目標環狀巨環內酯系化合物同樣地具有雙鍵之化合物亦可進行分離的方法。
於是,本發明者以含有他克莫司等環狀巨環內酯系化合物及其類似化合物之混合物為對象,研究各種分離精製手段,結果發現:若使用不對稱性識別劑固定化矽膠管柱層析儀,則出人意料地可效率良好地分離並非光學異構物之他克莫司與其複數種類似物,而可製造高純度之他克莫司,從而完成本發明。
即,本發明係提供如下[1]~[8]者。
[1]一種環狀巨環內酯系化合物之分離方法,其特徵在於:將含有環狀巨環內酯系化合物及1種以上其類似化合物之混合物施加至不對稱性識別劑固定化矽膠管柱層析儀,以自該混合物分離環狀巨環內 酯系化合物。
[2]如[1]之分離方法,其中環狀巨環內酯系化合物為他克莫司。
[3]如[1]或[2]之分離方法,其中環狀巨環內酯系化合物為他克莫司,且其類似化合物為選自子囊黴素、FR-901156及FR-900525中之1種或2種以上。
[4]如[1]至[3]中任一項之分離方法,其中不對稱性識別劑固定化矽膠為胺基甲酸酯修飾多糖類固定化矽膠或鏡像異構物修飾合成高分子固定化矽膠。
[5]一種環狀巨環內酯系化合物之製造方法,其係環狀巨環內酯系化合物之類似化合物之合計量未達0.27%的製造方法,其特徵在於:其係將含有環狀巨環內酯系化合物及1種以上其類似化合物的混合物施加至不對稱性識別劑固定化矽膠管柱層析儀。
[6]如[5]之製造方法,其中環狀巨環內酯系化合物為他克莫司。
[7]如[5]或[6]之製造方法,其中環狀巨環內酯系化合物為他克莫司,且其類似化合物為選自子囊黴素、FR-901156及FR-900525中之1種或2種以上。
[8]如[5]至[7]中任一項之製造方法,其中不對稱性識別劑固定化矽膠為胺基甲酸酯修飾多糖類固定化矽膠或鏡像異構物修飾合成高分子固定化矽膠。
根據本發明之分離方法,可產率良好地分離與目標環狀巨環內酯系化合物之差別點在於側鏈是否具有雙鍵、以及碳數多或少1個或2個等差別的類似化合物。儘管使用之管柱為原本就具有不對稱性識別劑之管柱,但可分離碳數差別微小之類似化合物之情況完全在預想之外。
圖1係表示實施例1之分離方法之分離狀況的圖。
圖2係表示比較例1之分離方法之分離狀況的圖。
圖3係表示比較例2之分離方法之分離狀況的圖。
本發明係利用不對稱性識別劑固定化矽膠管柱層析儀,自含有環狀巨環內酯系化合物及1種以上其類似化合物之混合物分離精製目標之環狀巨環內酯系化合物的方法。
作為環狀巨環內酯系化合物,可列舉:他克莫司、紅黴素類、阿奇黴素(Azithromycin)、交沙黴素(Josamycin)、北里黴素(Kitasamycin)、雷帕黴素(Rapamycin)類,較佳為雷帕黴素及他克莫司,尤佳為他克莫司。
作為環狀巨環內酯系化合物之類似化合物,可列舉利用培養技術製造該環狀巨環內酯系化合物時培養物中所含的類似化合物。例如,可列舉與環狀巨環內酯系化合物之結構上的差別點在於側鏈是否具有雙鍵、結構中之碳數為1~2個之差別等的化合物。作為他克莫司之類似化合物,可列舉:子囊黴素(Ascomycin)(FK520)、FR-901156、FR-900525等。以下,顯示他克莫司、子囊黴素、FR-901156及FR-900525之結構。
[化1]
Figure TWI614255BD00001
作為本發明中使用之含有環狀巨環內酯系化合物及1種以上其類似化合物的混合物,進而較佳為含有他克莫司、與選自子囊黴素、FR-901156及FR-900525中之1種或2種以上的混合物。更具體而言,為含有該等之混合物之培養液的部分精製物。
該混合物較佳為含有他克莫司60質量%(以下簡記為%)以上,更佳為含有70%以上,進而較佳為含有80%以上。又,他克莫司之含量之上限較佳為98%以下,更佳為95%以下,進而較佳為90%以下。該 混合物中之他克莫司之具體含量較佳為60~90%,更佳為70~95%,進而較佳為80~98%。又,上述類似化合物於混合物中合計較佳為含有2%以上,更佳為含有4%以上,進而較佳為含有5%以上。上述類似化合物於混合物中較佳為含有2~10%,更佳為含有4~10%,進而較佳為含有5~10%。
作為該混合物,例如可列舉他克莫司生產菌之培養物之部分精製物。作為他克莫司生產菌,例如可列舉日本專利特公平3-38276號公報中記載之菌,例如屬於鏈黴菌(Streptomyces)屬之他克莫司生產菌、屬於築波鏈黴菌(Streptomycestsukubaensis)之築波他克莫司屬之他克莫司生產菌、築波鏈黴菌No.9993。作為部分精製物,可列舉該公報記載之部分精製物。
本發明中,使用不對稱性識別劑固定化矽膠管柱作為分離用管柱。作為他克莫司與其類似化合物,並非為光學異構物、而為結構上不同之化合物。儘管如此,可效率良好地分離他克莫司與其類似化合物之情況係意料之外。
作為不對稱性識別劑固定化矽膠,可列舉:胺基甲酸酯修飾多糖類固定化劑矽膠、鏡像異構物固定化矽膠、鏡像異構物修飾合成高分子固定化矽膠、包容多糖類固定化矽膠、蛋白固定化矽膠、冠醚固定化矽膠、光學活性聚順丁烯二醯亞胺固定化矽膠等。作為胺基甲酸酯修飾多糖類,可列舉:胺基甲酸酯修飾纖維素、胺基甲酸酯修飾直鏈澱粉、胺基甲酸酯修飾瓊脂糖、胺基甲酸酯修飾支鏈澱粉、胺基甲酸酯修飾環糊精類等。更具體而言,可列舉下述式(1)表示之苯基胺基甲酸酯修飾多糖類。
[化2]
Figure TWI614255BD00002
(式中,R1、R2及R3相同或不同,表示氫原子、鹵素原子、烷基、烯基、炔基、烷氧基、芳基或烷醯基)此處,作為烷基,較佳為碳數1~6之烷基,作為烯基及炔基,較佳為碳數2~6之烯基、炔基。作為烷氧基,較佳為碳數1~6之烷氧基。作為芳基,較佳為苯基。作為烷醯基,較佳為碳數2~6之烷醯基。
作為鏡像異構物修飾合成高分子,可列舉經L-胺基酸、D-胺基酸等胺基酸類;(R)或(S)萘乙胺、(R)或(S)苯乙胺等光學活性胺類;L-酒石酸等光學活性有機酸等鏡像異構物修飾的聚(甲基)丙烯酸酯、及其固定化矽膠等。
關於本發明之分離方法,除使用上述不對稱性識別劑固定化矽膠管柱作為管柱以外,可與通常之矽膠管柱層析法同樣地進行。例如,使含有環狀巨環內酯系化合物及其類似化合物之混合物流入不對稱性識別劑固定化矽膠管柱,繼而利用對該化合物之溶離有用之溶離液進行溶離即可。於他克莫司之情形時,作為溶離液,較佳為使用己烷等飽和烴、醇及/或醚類之混合液,乙腈、醇、醚類、水等之混合液。
利用本發明方法獲得之他克莫司的純度較佳為99.0%以上,更佳為99.5%以上,進而較佳為99.7%以上。又,化合物I及化合物II各自之含量較佳為0.1%以下,子囊黴素、化合物I及化合物II之類似化合物之合計量較佳為未達0.27%。
[實施例]
繼而,列舉實施例詳細地說明本發明。
參考例1
將含有甘油(1%)、玉米澱粉(1%)、葡萄糖(0.5%)、棉籽粉(1%)、玉米浸液(0.5%)、乾燥酵母(0.5%)、碳酸鈣(0.2%)之培養基(150mL、pH值6.5)於120℃下滅菌30分鐘。自築波鏈黴菌No.9993株(獨立行政法人 產業技術綜合研究所 專利生物寄存中心寄存編號FERM BP-927)之斜面培養物取1白金耳接種至經滅菌之培養基中,以30℃振盪培養4天。對含有可溶性澱粉(4.5%)、玉米浸液(1.0%)、乾燥酵母(1%)、碳酸鈣(0.1%)、Adekanol(0.1%)之培養基(15L、pH值6.8)接種預培養物,以30℃培養4天。
對獲得之培養液添加活性碳及矽藻土,進行過濾。以丙酮8L萃取菌絲體混合物,並對萃取液進行濃縮。對濃縮物添加氯化鈉170g、乙酸乙酯1.7L,攪拌後去除水層。將有機層以氯化鈉水溶液洗浄後,濃縮乙酸乙酯層。將獲得之濃縮物施加至矽膠管柱層析儀,將以乙酸乙酯:正己烷之混合液(1:1)及(4:1)溶出之他克莫司之溶出分濃縮,而獲得含有他克莫司、子囊黴素、17-丙基-1,14-二羥基-12-[2-(4-羥基-3-甲氧基環己基)-1-甲基乙烯基]-23,25-二甲氧基-13,19,21,27-四甲基-11,28-二氧雜-4-氮雜環[22.3.1.04,9]二十八環-18-烯-2,3,10,16-四酮(以下簡稱為化合物I)、16-烯丙基-1,13-二羥基-11-[2-(4-羥基-3-甲氧基環己基)-1-甲基乙烯基]-22,24-二甲氧基-12,18,20,26-四甲基-10,27-二氧雜-4-氮雜環[21.3.1.04,8]二十七環-17-烯-2,3,9,15-四酮(以下簡稱為化合物II)的混合物。其組成比為他克莫司90.5%、子囊黴素6.4%、化合物I 2.6%、化合物II 0.4%。
分離出之活性溶出分中所含之子囊黴素、化合物I及化合物II的濃度之和越低越佳,實際使用上必須未達0.27%。
實施例1
使用CHIRALPAK(註冊商標)IC之管柱層析儀進行之分離
將含有以參考例1中所示之方法獲得之他克莫司、子囊黴素、化合物I、化合物II之混合物4mg施加至化學鍵結有不對稱性識別劑即三(3,5-二環苯基胺基甲酸酯)纖維素之矽膠即CHIRALPAK(註冊商標)IC 4mL的管柱層析儀,使用正己烷:2-丙醇:甲基第三丁基醚之混合液(70:15:15)作為溶離液,進行溶出。
將其結果示於圖1。利用HPLC(high performance liquid chromatography,高效液相層析法)分析測定分離出之活性溶出分之純度。溶出之溶出分組成中,他克莫司為99.88%,子囊黴素為0.08%,化合物I為0.04%,未檢測出化合物II。
實施例2
使用CHIRALPAK(註冊商標)IE之管柱層析儀進行之分離
將與實施例1同樣之他克莫司、子囊黴素、化合物I、化合物II之混合物4mg施加至化學鍵結有不對稱性識別劑即三(3,5-二氯苯基胺基甲酸酯)直鏈澱粉之矽膠即CHIRALPAK(註冊商標)IE 4mL的管柱層析儀,使用正己烷:2-丙醇:甲基-第三丁基醚之混合液(45:15:40)作為溶離液,進行溶出。
利用HPLC分析測定分離出之活性溶出分之純度。溶出之溶出分組成中,他克莫司為100.00%,子囊黴素、化合物I、化合物II均未檢測出。
比較例1
使用DIAION(註冊商標)HP20SS及含硝酸銀溶離液之管柱層析儀進行的分離
將與實施例1同樣之他克莫司、子囊黴素、化合物I、化合物II之混合物200mg施加至DIAION(註冊商標)HP20SS 20mL之管柱層析儀,作為溶離液,使用含有0.294mol/L硝酸銀之50%丙酮水溶液,繼而使用60%丙酮水溶液,進行溶出。將其結果示於圖2。利用HPLC分 析測定分離出之活性溶出分之純度。溶出之溶出分組成中,他克莫司為99.73%,未檢測出子囊黴素及化合物I,且化合物II為0.27%。
比較例2
使用DIAION(註冊商標)RCP160M離子交換樹脂之銀鹽之管柱層析儀進行的分離
利用硝酸銀溶液使銀離子吸附於DIAION(註冊商標)RCP160M離子交換樹脂15.6mL上後,施加與實施例1同樣之他克莫司、子囊黴素、化合物I、化合物II之混合物200mg,使用乙酸乙酯:甲醇之混合液(1:1)作為溶離液,進行溶出。將其結果示於圖3。利用HPLC分析測定分離出之活性溶出分之純度。溶出之溶出分組成中,他克莫司為99.35%,子囊黴素為0.2%,化合物I為0.06%,化合物II為0.4%。
實施例3
使用YMC Chiral NEA(註冊商標)(R)之管柱層析儀進行之分離
將與實施例1同樣之他克莫司、子囊黴素、化合物I、化合物II之混合物1mg施加至鍵結有不對稱性識別劑即(R)-1-(α-萘基)乙胺之甲基丙烯酸酯聚合物經固定化之矽膠即Chiral NEA(註冊商標)(R)2.5mL的管柱層析儀,使用35%乙腈作為溶離液,進行溶出。利用HPLC分析測定分離出之活性溶出分之純度。溶出之溶出分組成中,他克莫司為99.94%,子囊黴素為0.02%,未檢測出化合物I,且化合物II為0.04%。

Claims (4)

  1. 一種他克莫司之分離方法,其特徵在於:將含有他克莫司及1種以上其類似化合物之混合物施加至多糖類固定化矽膠管柱或鏡像異構物修飾合成高分子固定化矽膠管柱層析儀,以自該混合物分離他克莫司。
  2. 如請求項1之分離方法,其中他克莫司之類似化合物為選自子囊黴素、FR-901156及FR-900525中之1種或2種以上。
  3. 一種他克莫司之製造方法,其係製造他克莫司之類似化合物之合計量未達0.27%之他克莫司者,其特徵在於:其係將含有他克莫司及1種以上其類似化合物之混合物施加至多糖類固定化矽膠管柱或鏡像異構物修飾合成高分子固定化矽膠管柱層析儀,收集他克莫司之層析分離之成分。
  4. 如請求項3之製造方法,其中他克莫司之類似化合物為選自子囊黴素、FR-901156及FR-900525中之1種或2種以上。
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