JP5175076B2 - 新規エポキシ化合物 - Google Patents
新規エポキシ化合物 Download PDFInfo
- Publication number
- JP5175076B2 JP5175076B2 JP2007284722A JP2007284722A JP5175076B2 JP 5175076 B2 JP5175076 B2 JP 5175076B2 JP 2007284722 A JP2007284722 A JP 2007284722A JP 2007284722 A JP2007284722 A JP 2007284722A JP 5175076 B2 JP5175076 B2 JP 5175076B2
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- Prior art keywords
- compound
- carene
- general formula
- acetylcholinesterase inhibitor
- group
- Prior art date
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Images
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
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- Epoxy Compounds (AREA)
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Description
で表される化合物。
で表される化合物の製造方法であって、(+)−3−カレン((+)−3−carene)を生物変換し、必要に応じて水酸基を保護することを特徴とする製造方法。
Rで示される保護基としては、水酸基の保護基であれば特に限定はなく、例えば、アシル基(アセチル、プロパノイル、ベンゾイル等)、シリル基(トリメチルシリル基、トリエチルシリル基、トリイソプロピルシリル基、t−ブチルジメチルシリル基等)、アルキル基(メチル、エチル、プロピル、ブチル等)、アルケニル基(アリル、クロチル等)、アラルキル基(ベンジル、フェネチル等)、アルコキシアルキル基(メトシキメチル基等)、スルホニル基(メタンスルホニル、ベンゼンスルホニル等)などが挙げられる。
(1)S. litura幼虫の飼育
S. litura幼虫を、ナイロンメッシュスクリーンを有するプラスチック容器(200×300mm 幅, 100 mm 高さ, 1容器当たり幼虫100 個)で飼育した。飼育は、25℃、相対湿度70%及び一定の光照射(恒明)条件下で行った。市販の食餌(Insect LF; 日本農産工業株式会社)を初齢の幼虫に与えた。4齢から食餌をインゲン豆(kidney beans)100g、寒天12g及び水600mLからなる人工食餌に変えた。
(2)基質の投与
寒天を含まない人工食餌をブレンダーで混合した。(+)−3−カレン(1)(Fluka Co., Ltd)2100mgを、食餌1g当たり1mgとなるようにブレンダーに直接投入した。寒天を水に溶かして沸騰させ、これをブレンダーに加えた。食餌を混合し、ステンレススチールのトレイ(220×310mm幅、30mm高さ)に入れて冷却した。(+)−3−カレン(1)を含む食餌を、投与時まで冷蔵庫に貯蔵した。4齢から5齢の幼虫(平均重量0.5g)を新しい容器(容器当たり100個)に移し、決められた量の食餌を幼虫に与えた。800個の幼虫のグループのそれぞれに、(+)−3−カレン(1)を含む食餌を2日間与え、その後(+)−3−カレン(1)を含まない人口食餌を与えた。糞粒を毎5時間ごとに集め(計4日間)、ジエチルエーテル(300mL)中で貯蔵した。食餌と糞粒の分離のために、4齢から5齢の幼虫が排泄してすぐに新しい糞粒を抽出した。
(3)糞粒から代謝産物の単離及び構造決定
糞粒をジエチルエーテル(300ml×2)、次いで酢酸エチル(300ml×2)で抽出した。抽出溶液を減圧下で濃縮して、3200mgの抽出物を得た。これを酢酸エチルに溶解し、5% NaHCO3水溶液を加えた。シェイクした後、酢酸エチル相から中性のフラクション(2000mg)を得た。
[α]28.0 D +4.76° (c 1.00, CHCl3);
IR (KBr) νmax 3425, 1063, 1017, 837 cm-1;
1H-NMR (CDCl3 , 500MHz) δ0.62 (1H, ddd, J=9.2, 9.2, 2.3, H-6), 0.70 (1H, ddd, J=9.2, 9.2, 2.3, H-1), 0.86 (3H, s, H-8), 1.28 (3H, s, H-10), 1.53 (1H, dd, J=16.1, 2.3, H-2a), 1.68 (1H, ddd, J=16.5, 2.3, 2.3, H-5a), 2.19 (1H, dd, J=16.1, 9.2, H-2b), 2.34 (1H, ddd, J=16.5, 9.2, 2.3, H-5b), 2.87 (1H, brs, H-4), 3.32 (2H, s, H-9);
13C-NMR (CDCl3 , 125MHz) δ 10.2 (C-8), 11.2 (C-6), 13.3 (C-1), 18.9 (C-5), 22.9 (C-10), 23.0 (C-2), 23.1 (C-7), 55.9 (C-3), 58.0 (C-4), 72.5 (C-9);
HR-EI-MS, m/z 168.1167 [M]+, calcd. for C10H16O2, 168.1151;
EIMS, m/z (rel intensity) 168 [M]+ (0.1), 150 (12), 135 (21), 121 (29), 107 (33), 93 (24), 91 (23), 79 (26), 43 (100);
化合物(2)の化学構造について、HR-EIMSより分子式C10H16O2が示唆された。IRスペクトルより、3425カイザーに水酸基由来のシグナルが観測され、プロトンNMRスペクトル測定より、9位のメチル及び、2位のオレフィンのプロトンが消失し、新たに2.87 ppmに1Hのブロードシングレット、3.32 ppmに2Hのシングレットのプロトンがそれぞれ観測された。また、カーボンNMRより、55.9 ppmに4級炭素、58.0 ppmに3級炭素、72.5 ppmに2級炭素が観測された。3.32 ppmのプロトンから、8位のメチル基、1位6位のカーボンへのHMBCが観測されたことから、9位への水酸化が示唆された。また10位のメチル基のプロトンより、55.9 ppm、 58.0 ppmのカーボンへのHMBCが観測され、2.87 ppmのプロトンより、5位の2級炭素および6位の3級炭素へのHMBCが観測された。NOE測定により、9位の水素から、1, 6位、および8位への水素へのNOEが観測され、8位のメチル水素より2位および5位の水素へのNOEが観測される事から、水酸化は9位のメチルに進行したと決定した。また、10位のメチル水素より、2位の水素へのNOEが、また4位の水素より5位の水素へのNOEが観測される事から、エポキシはアルファ位に位置していると決定した(図1を参照)。化合物(2)の絶対立体は化合物(1)の絶対配置の比較により決定した。なお旋光度が+の値を示したことから、化合物(2)は(+)-(1S,3S,4R,6R,7S)-3,4-エポキシカラン-9-オールであると決定した。
(1)AChE阻害試験法は、G. L.Ellman, K. D. Courtney, V. Andres. Jr., R. M. Featherstone. Biochem. Pharmacol. 7, 88-95 (1961)の方法に従って行った。
Aはテストサンプルの吸光度を示す。((+)-3-carene (1) or (+)-(1S,3S,4R,6R,7S)-3,4-epoxycaran-9-ol (2) in DTNB, AChE and 0.1 M phosphate -buffer, ATC)
Bはブランクの吸光度を示す。(test sample, DTNB and 0.1M phosphate -buffer)
Cpはポジティブコントロールの吸光度を示す。(EtOH, DTNB, AChE and 0.1M phosphate -buffer, ATC)
Cnはネガティブコントロールの吸光度を示す。(EtOH, DTNB and 0.1M phosphate -buffer)
測定結果を表1及び図2に示す。
1×1cmの開口部を設けた金網にてヘアレスマウスを固定し、開口部以外の部位をカバーにて覆った。開口部から露出しているヘアレスマウスの皮膚に、薬剤の最終濃度が5mg/cm2及び1mg/cm2となるように各試験試料を処理した。薬剤処理したヘアレスマウスをヒトスジシマカ15匹が入ったナイロンネットケージ(25×25×25cm)の中央部に設置した。経過時間ごとに吸血したヒトスジシマカの個体数を目視にてカウントし記録した。薬剤処理のヘアレスマウスと同時に、無処理のヘアレスマウスおよび溶剤であるエタノール処理のヘアレスマウスについても同様の手順で試験を行った。
(1)化合物(2)(エタノール溶液)50mg/ml濃度を用いて、溶媒除去して最終濃度が5mg/cm2及び1mg/cm2となるように塗布する。
(2)N,N-ジエチル-3-メチルベンズアミド(ディート;DEET)(エタノール溶液)50mg/ml濃度を用いて、溶媒除去して最終濃度が5mg/cm2及び1mg/cm2となるように塗布する。
・ヒトスジシマカ(Aedes albopictus) 累代飼育の未吸血雌個体((株)大阪製薬)
・ヘアレスマウス(Hos:HR-1) 12週齢雌個体
経過時間ごとのヒトスジシマカの吸血数の試験結果を表2に示す。
Claims (10)
- 一般式(II)において、RがHである請求項1に記載の化合物。
- 請求項1又は2に記載の化合物を有効成分として含むアセチルコリンエステラーゼ阻害剤。
- 請求項3に記載のアセチルコリンエステラーゼ阻害剤を含有する老人性認知症の予防又は治療薬。
- 請求項3に記載のアセチルコリンエステラーゼ阻害剤を含有するアルツハイマー型認知症の予防又は治療薬。
- 請求項3に記載のアセチルコリンエステラーゼ阻害剤を含有する芳香剤。
- 請求項3に記載のアセチルコリンエステラーゼ阻害剤を含有するアロマテラピー用エッセンシャルオイル。
- 請求項1又は2に記載の化合物を有効成分として含む害虫忌避剤。
- 害虫が蚊である請求項8に記載の害虫忌避剤。
- 一般式(II):
(式中、RはH又はアセチル、プロパノイル、ベンゾイル、トリメチルシリル、トリエチルシリル、トリイソプロピルシリル、t−ブチルジメチルシリル、メチル、エチル、プロピル、ブチル、アリル、クロチル、ベンジル、フェネチル、メトキシメチル、メタンスルホニル及びベンゼンスルホニルからなる群から選択される保護基を示す。)
で表される化合物の製造方法であって、S. litura(ハスモンヨトウ)の幼虫を飼育して、(+)−3−カレン((+)−3−carene)を含む食餌を幼虫に与えて、その糞粒を採取し、抽出することにより(+)−3−カレンを生物変換し、必要に応じて水酸基を保護することを特徴とする製造方法。
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