JP3584050B2 - Steroid compounds - Google Patents

Steroid compounds Download PDF

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JP3584050B2
JP3584050B2 JP11276093A JP11276093A JP3584050B2 JP 3584050 B2 JP3584050 B2 JP 3584050B2 JP 11276093 A JP11276093 A JP 11276093A JP 11276093 A JP11276093 A JP 11276093A JP 3584050 B2 JP3584050 B2 JP 3584050B2
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JPH06321782A (en
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紘一 首藤
泰之 遠藤
祐一 橋本
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IMMD INC.
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IMMD INC.
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Description

【0001】
【産業上の利用分野】
本発明は、発がんプロモーター阻害剤に関する。さらに詳しくは、レセプター蛋白に対する発がんプロモーターの結合を阻害することができ、発がん抑制剤として有用な発がんプロモーター阻害剤に関する。
【0002】
【従来の技術】
発がんプロモーターは、それ自身ではがんを引き起こさないが、発がん性物質により惹起された生物学的変化を増幅・修飾して、最終的な発がん状態に至らしめる物質である。その代表的な物質として、12−O−テトラデカノイル−ホルボール 13−アセテート(TPA)等のホルボールエステル(ジテルペン化合物)やテレオシジン(インドールアルカロイド)を挙げることができる。
これらの発がんプロモーターが結合する細胞内レセプターの一つとして、カルシウム依存性蛋白質リン酸化酵素(PKC)が知られている。しかしながら、蛋白質リン酸化酵素の基質特異性は低いこと、ならびに蛋白質リン酸化酵素活性化の情報が核内に伝達される機構は明らかではなく蛋白質リン酸化酵素の阻害剤は必ずしも発がんを抑制しないことから、これらの発がんプロモーターの細胞内レセプターとして、蛋白質リン酸化酵素以外のレセプターの存在が強く示唆されていた。
【0003】
本発明者は、これらの発がんプロモーターが結合する細胞内レセプターを検索するうち、蛋白質リン酸化酵素とは異なる複数の細胞内レセプター(発がんプロモーター結合蛋白:Tumor Promoter Binding Proteins (TBPs), Biochem. Biophys. Res. Com. 166, 1126−1132, 1990)を発見し、さらに、それらの細胞内レセプターのうちの一つが、リガンド依存的に細胞質内から核内へと移行する性質を有する発がんプロモーター特異的結合蛋白であることを見出し、CN−TPBP(Cytosolic−Nuclear Tumor Promoter−Specific Binding Protein)と命名した(Jpn. J. Cancer Res. 82, 665−675, 1991 )。
【0004】
【発明が解決しようとする課題】
本発明は、上記の発がんプロモーター特異的結合蛋白CN−TPBP に対する発がんプロモータの結合を拮抗的に阻害し、発がんプロモーターの作用を抑制する物質を提供することを目的としている。
【0005】
【課題を解決するための手段】
本発明者は、上記の課題を解決すべく、種々の化合物について発がんプロモーター特異的結合蛋白CN−TPBP に対する親和性を検索したところ、特定のステロイド化合物類が、発がんプロモーター特異的結合蛋白CN−TPBP に対して強い親和性を示し、CN−TPBP に対するTPA等の発がんプロモータの結合を拮抗的に阻害することを見出した。本発明は、上記の知見に基づいて完成されたものである。本発明の発がんプロモーター阻害剤は、ホルボールエステルやテレオシジンのような蛋白質リン酸化酵素活性化作用を有しないので、発がんプロモーターの作用を抑制することができ、発がん抑制に有用である。
本発明の阻害剤に有効成分として含有される化合物はステロイド系化合物であり、以下の式(I):
【0006】
【化3】
で示される3β、5α−ジヒドロキシアンドロスタン−6−オン誘導体である。式中、X は=O または −OHを示し、R は−O−CO−Rまたは−CHR−Rを示す(Rは直鎖または分枝したアルキル基、直鎖または分枝したアルケニル基、直鎖または分枝したアラルキル基、あるいは置換または非置換フェニル基であり、Rは水素原子、あるいは直鎖または分枝した低級アルキル基であり、Rは直鎖または分枝したアルキル基、直鎖または分枝したアルケニル基、直鎖または分枝したアルコキシ基、直鎖または分枝したアルケニルオキシ基、直鎖または分枝したアラルキル基、あるいは置換または非置換フェニル基である)。上記の一般式(I)中、ステロイド骨格の3位および5位の水酸基はそれぞれβ配置およびα配置であり、X が −OHを示す場合には、6位の水酸基はβ配置をとることが好ましい。R はβ配置でステロイド骨格に置換することが好ましい。
【0007】
式(I)で示される化合物として、例えば以下の表1に示す化合物を挙げることができるが、本発明の阻害剤に含まれる化合物はこれらの化合物に限定されることはない。
【0008】
【表1】
これらのうち、特に好ましい化合物としては、X が=O でありR が−CH(CH)−(CHCH(CHである化合物、X が=O でありR が−CH(CH)−O−(CHCH(CHである化合物、およびX が=O でありR が−O−CO−(CHCH である化合物を挙げることができる。
【0009】
これらの化合物の一部は新規化合物である。これらは、上記の式中、X が=O を示し、R が−O−CO−Rまたは−CHR−Rを示す化合物である。Rは直鎖または分枝したアルキル基、直鎖または分枝したアルケニル基、直鎖または分枝したアラルキル基、あるいは置換または非置換フェニル基であり、Rは水素原子、あるいは直鎖または分枝した低級アルキル基であり、Rは直鎖または分枝したアルキル基、直鎖または分枝したアルケニル基、直鎖または分枝したアルコキシ基、直鎖または分枝したアルケニルオキシ基、直鎖または分枝したアラルキル基、あるいは置換または非置換フェニル基である。ただし、R は−CH(CH)(CHCH(CHであることはない。これらの化合物は、例えば、本明細書の実施例に記載された方法により製造することができる。
【0010】
公知の化合物は、公知文献に記載された方法により当業者に容易に製造される。例えば3β,5α−ジヒドロキシコレスタン−6−オン (YS−64)等は、フィーザーらの方法(Fieser, L.F., Rajagopalan, S., J. Am. Chem. Soc., 1949, 71, 3938−3941) により製造することができる。
本発明の阻害剤は、リガンド依存的に細胞質内から核内へと移行する性質を有する発がんプロモーター結合蛋白CN−TPBP(Cytosolic−Nuclear Tumor Promoter−Specific Binding Protein)に対して強い親和性を示し、TPA 等の発がんプロモータのCN−TPBP に対する結合を拮抗的に阻害する。加えて、本発明の阻害剤は、ホルボールエステルやテレオシジンのような蛋白質リン酸化酵素活性化作用を有しないので、発がんプロモーターの作用を抑制することができ、発がんプロモーターの作用抑制剤あるいは発がん抑制剤として有用である。発がんプロモーターの作用機序の研究用試薬または発がんプロモーターのスクリーニング用試薬等の生化学用試薬として、あるいは臨床検査用試薬として有用である。
【0011】
本発明の阻害剤を、ヒト等の哺乳類に対して発がん抑制剤として用いる場合には、式(I)で示される上記の化合物を有効成分として含む医薬組成物として投与すればよい。このような医薬用組成物は、経口的あるいは非経口的に患者に投与すればよく、例えば、錠剤、カプセル剤、散剤、細粒剤、顆粒剤、液剤、及びシロップ剤等等の経口投与用医薬組成物、あるいは注射剤、坐剤、吸入剤、点眼剤、点鼻剤、軟膏剤、及び貼付剤等の非経口投与用医薬組成物として投与すればよい。これらの医薬組成物は、薬理学的、製剤学的に許容しうる添加物を加えて製造してもよい。薬理学的、製剤学的に許容しうる添加物の例として、例えば、賦形剤、崩壊剤ないし崩壊補助剤、結合剤、滑沢剤、コーティング剤、色素、希釈剤、基剤、溶解剤ないし溶解補助剤、等張化剤、pH調節剤、安定化剤、噴射剤、及び粘着剤等を挙げることができ、これらは目的に応じて適宜当業者により選択される。
【0012】
例えば、経口投与、あるいは経皮又は経粘膜投与に適する医薬用組成物には、ブドウ糖、乳糖、D−マンニトール、デンプン、又は結晶セルロース等の賦形剤;カルボキシメチルセルロース、デンプン、又はカルボキシメチルセルロースカルシウム等の崩壊剤又は崩壊補助剤;ヒドロキシプロピルセルロース、ヒドロキシプロピルメチルセルロース、ポリビニルピロリドン、又はゼラチン等の結合剤;ステアリン酸マグネシウム又はタルク等の滑沢剤;ヒドロキシプロピルメチルセルロース、白糖、ポリエチレングリコール又は酸化チタン等のコーティング剤;ワセリン、流動パラフィン、ポリエチレングリコール、ゼラチン、カオリン、グリセリン、精製水、又はハードファット等の基剤;フロン,ジエチルエーテル、又は圧縮ガス等の噴射剤;ポリアクリル酸ナトリウム、ポリビニルアルコール、メチルセルロース、ポリイソブチレン、ポリブテン等の粘着剤;木綿布又はプラスチックシート等の基布等の製剤用添加物を添加することができる。注射用に適する医薬用組成物には、注射用蒸留水、生理食塩水、プロピレングリコール等の水性あるいは用時溶解型注射剤を構成しうる溶解剤又は溶解補助剤;ブドウ糖、塩化ナトリウム、D−マンニトール、グリセリン等の等張化剤;無機酸、有機酸、無機塩基又は有機塩基等のpH調節剤等の製剤用添加物を添加してもよい。発がんの予防を目的として上記の医薬用組成物を投与する場合の投与量は、目的に応じて適宜選択すればよいが、例えば、成人一日あたり有効成分として0.1 〜10 mg を投与すればよい。
【0013】
【実施例】
以下に本発明を実施例によりさらに具体的に説明するが、本発明はこれらの実施例に限定されることはない。
例1:3β,5α−ジヒドロキシ−23,24−ビスノルコラン−6−オン(YS−149)
スチグマステリルアセテートをメタクロル過安息香酸で選択的に酸化した後、触媒量の過塩素酸の存在下に加水分解して3β−アセトキシ−スチグマスト−22−エン−5α,6β−ジオールを得た。アルミニウムオキサイドの存在下にこの化合物をピリジニウムクロロクロメートで酸化し、さらに6位ケトンをエチレンジオキシ基で保護して3β−アセトキシ−6,6−エチレンジオキシスチグマスト−22−エン−5α−オールを得た。この化合物をメタノール−ジクロロメタン−ピリジン中でオゾン分解して、ビスノルコラン−22−アールを得た。
【0014】
ビスノルコラン−22−アールをエチレングリコール中でヒドラジン水和物と水酸化カリウムにより処理して6位ケトンの脱保護を行い、3β,5α−ジヒドロキシ−23,24−ビスノルコラン−6−オンを得た。
YS−149:無色針状晶 m.p. 149−150 ℃(エタノール/n−ヘキサン)
Anal. (C2236: R=−CH(CH
H−NMR (CDCl) 0.64(s,3H,18−CH), 0.81(s,3H,19−CH), 0.84(d,3H, J=6.6Hz, 22−CH), 0.92(d,3H,J=6.6Hz,21−CH), 2.01(bd,1H), 2.13(dd,1H,J=12.8 & 4.8Hz,7−beta−H), 2.70 (t,1H,J=12.8Hz,7−alpha−H), 3.97(m,1H,3−alpha−H)
【0015】
例2:3β,5α−ジヒドロキシ−23,24−ビスノルコラン−6−オン(YS−149)の側鎖伸長体
ビスノルコラン−22−アールをテトラヒドロフラン中で適当なホスホニウムイリドにより処理してシス体およびトランス体の混合物として22−不飽和化合物を得た。例1に記載された方法により6位ケトンの脱保護を行い、さらに22位の二重結合を接触還元して3β,5α−ジヒドロキシ−23,24−ビスノルコラン−6−オン(YS−149)の側鎖伸長体を得た。
【0016】
例3:3b,5a−ジヒドロキシコレスト−22E−エン−6−オン(YS−126)
ビスノルコラン−22−アールをテトラヒドロフラン中でイソアミルトリフェニルホスホニウムイリドで処理し、トランス−22−エン体を得た。6−ケト基と3ベータ水酸基の脱保護を行い、目的化合物を得た。
YS−126: m.p. 235−238 ℃(酢酸エチル)
Anal. (C2744: R=−CH(CH)CH=CHCHCH(CH
H−NMR (CDCl) 0.68(s,3H,18−CH), 0.81(s,3H,19−CH), 0.88, 0.89(d,2×3H, J=6.6Hz, 26−,27−CH), 0.95(d,3H,J=6.6Hz,21−CH), 2.01(bd,1H), 2.13(dd,1H,J=12.7 & 4.7Hz,7−beta−H), 2.41(m,1H,20−H), 2.71 (t,1H,J=12.7Hz,7−alpha−H), 3.97(m,1H,3−alpha−H), 5.18(m,2H,22−,23H)
【0017】
例4
5.00gのプレグネノロンをジメチルホルムアミド15mlとテトラヒドロフラン15mlの混合物に溶解し、イミダゾール4.395g(3当量)を加えた。氷冷下に、3.685gのターシャリーブチルジメチルシリルクロライド(約1.5当量)を加えて10時間攪拌した。30mlの水を加えて溶媒を留去し、ジクロルメタンで抽出して、水洗、脱水後に溶媒を留去した。残渣をシリカゲルカラムクロマトグラフィー(酢酸エチル:n−ヘキサン=10:1)により精製し、6.57gの3位水酸基のシリル化保護体を得た(収率96.5%)。酢酸エチルより再結晶して無色柱状晶を得た(m.p. 164.5−165℃) 。
【0018】
上記のシリル体3.35gをエタノール50mlとテトラヒドロフラン50mlの混合物に溶解し、ナトリウムボロハイドライド0.90gを氷冷下に加え、室温で5時間攪拌した。5%酢酸を溶液に加えて溶媒を留去し、水を加えてジクロルメタンにより抽出した。水洗、脱水後に溶媒を留去し、シリカゲルカラムクロマトグラフィー(酢酸エチル:n−ヘキサン=7:1)により精製し、20位カルボニル基が水酸基に還元された化合物2.44gを得た(収率72.4%)。メタノールより再結晶して無色針状晶を得た(m.p. 151℃) 。
ナトリウムハイドライド 138.8 mg をn−ヘキサン(1ml×3)で洗浄してキシレン1mlに懸濁し、上記の化合物 606.7 mg をキシレン4mlに溶解して加え、イソペンチルクロライド0.87mlを加えて17時間還流した。10%クエン酸と水を加えてジクロルメタンにより抽出し、水洗、脱水した後、溶媒を留去した。残渣をシリカゲルカラムクロマトグラフィー(n−ヘキサン:ジクロルメタン=3:1)により精製して、20位にイソペンチルオキシ基が導入された化合物 490.8 mg を得た(収率69.7%)。メタノールより再結晶して無色針状晶を得た(m.p. 82 ℃) 。
H−NMR (400MHz/CDCl) 0.05(s,6H,TBDMS Me), 0.69(s,3H,18−CH), 0.88(s,9H,TBDMS t−Bu), 0.90(d,6H,J=6.5Hz,4’−CH), 1.00(s,3H,19−CH), 1.06(d,3H,J=6.0Hz,21−CH), 3.22(dt,1H,J=7.9Hz,1’−H), 3.25(m,1H,20−H), 3.47 (m,1H,3−H), 3.57(dt,1H,J=7.9Hz,1’−H), 5.31(dd,1H,J=5.0Hz,6−H)
上記の化合物 547.0 mg をアセトン23mgに溶解し、過塩素酸0.05ml、水0.05ml、およびアセトン2mlの混合物を氷冷下で加えた。室温で3時間攪拌した後、飽和重曹水6mlを加えてアセトンを留去し、水を加えてジクロルメタン(30ml×3)で抽出した。水洗、脱水後に溶媒を留去し、残渣をシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=4:1)により精製して、3位水酸基の脱保護化合物 398.5 mg を得た(収率94.1%)。n−ヘキサン:酢酸エチルより再結晶して無色針状晶を得た( m.p. 155 ℃) 。
H−NMR (400MHz/CDCl) 0.69(s,3H,18−CH), 0.90(d,6H,J=6.5Hz,4’−CH), 1.02(s,3H,19−CH), 1.06(d,3H,J=6.0Hz,21−CH), 3.21(dt,1H,J=7.9Hz,1’−H), 3.23(m,1H,20−H), 3.50−3.58(m,2H,3−H,1’−H), 5.35(dd,1H,J=5.5Hz,6−H)
上記の脱保護体 371.2 mg をジクロルメタン2mlに溶解してピリジン0.4mlを加えた後、無水酢酸0.55mlを滴下して室温で1日攪拌した。ジクロルメタン50mlを加え、2N塩酸(30ml×2)、飽和重曹水(30ml×2)および水50mlで洗浄し、脱水後に溶媒を留去した。シリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=10:1)で精製し、3位アセトキシ体 387.0 mg を得た(収率94.1%)。メタノールより再結晶して無色針状晶を得た(m.p. 75.5−76℃) 。
H−NMR (400MHz/CDCl) 0.69(s,3H,18−CH), 0.90(d,6H,J=6.5Hz,4’−CH), 1.02(s,3H,19−CH), 1.06(d,3H,J=6.0Hz,21−CH), 2.03(s,3H,AcO), 2.32(d,2H,J=7.0Hz,4−H), 3.21(dt,1H,J=7.9Hz,1’−H), 3.24(m,1H,20−H), 3.57(dt,1H,J=7.9Hz,1’−H), 4.60(m,1H,3−H), 5.37(dd,1H,J=5.0Hz,6−H)
【0019】
上記アセトキシ体368.7mgをジクロルメタン2mlに溶解し、メタクロル過安息香酸216.7mgをジクロルメタン4mlに溶解して氷冷下に加え、室温で80分間攪拌した。ジクロルメタン40mlを加えて、10% NaHSO(30 ml×2)、飽和重曹水(30 ml×2)、水50mlで洗浄し、脱水した後に溶媒を留去した。シリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=10:1)により精製して、エポキシ体 283.5 mg を無色油状物として得た(収率74.1%)。
主生成物:
H−NMR (400MHz/CDCl) 0.62(s,3H,18−CH), 0.88(d,6H,J=7.0Hz,4’−CH), 1.04(d,3H,J=6.0Hz,21−CH), 1.08(s,3H,19−CH), 2.01(s,3H,AcO), 2.88(d,1H,J=4.5Hz,6−H), 3.15−3.25(m,2H,1’−H, 20−H), 3.55(m,1H,1’−H), 4.95(m,1H,3−H),
副生成物:
H−NMR (400MHz/CDCl) 0.65(s,3H,18−CH), 0.88(d,6H,J=7.0Hz,4’−CH), 1.01(s,3H,19−CH), 1.04(d,3H,J=6.0Hz,21−CH), 2.03(s,3H,AcO), 3.07(d,1H,J=4.0Hz,6−H), 3.15−3.25(m,2H,1’−H, 20−H), 3.55(m,1H,1’−H), 4.76(m,1H,3−H),
上記のエポキシ体273.8mgをアセトン8mlに溶解し、過塩素酸0.05ml、水0.05ml、およびアセトン2mlの混合物を氷冷下に加えて、室温で7時間攪拌した。飽和重曹水2mlを加えてアセトンを留去し、水を加えて酢酸エチルで抽出(30 ml×2)した。飽和食塩水で洗浄し、脱水して溶媒を留去し、残渣をシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=2:1)により精製してエポキシが開環したジオール体 262.8 mg を無色固体として得た(収率92.5%)。
H−NMR (400MHz/CDCl) 0.69(s,3H,18−CH), 0.89(d,6H,J=7.0Hz,4’−CH), 1.05(d,3H,J=6.0Hz,21−CH), 1.19(s,3H,19−CH), 2.02(s,3H,AcO), 3.19(dt,1H,J=7.9Hz,1’−H), 3.24(m,1H,20−H), 3.53−3.56(m,2H,1’−H,6H), 5.15(m,1H,3−H)
ピリジニウムクロロクロメート0.34g、Al1.14gにジクロルメタン3mlを加えてアルゴン置換し、激しく攪拌しつつ上記のジオール体242.8mgをジクロルメタン3mlに溶解して氷冷下に加えた。室温で2.5時間攪拌し、後処理することなくシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=5:1)で精製して、6位ケトン体 225.3 mg を得た(収率93.1%)。n−ヘキサンより再結晶して無色針状晶を得た(m.p. 177℃) 。
H−NMR (400MHz/CDCl) 0.65(s,3H,18−CH), 0.83(s,3H,19−CH), 0.89(d,6H,J=6.5Hz,4’−CH), 1.06(d,3H,J=6.0Hz,21−CH), 2.02(s,3H,AcO), 2.12(dd,1H,J=5.14Hz,7−beta−H), 2.75(t,1H,J=13Hz,7−alph−H), 3.16−3.27(m,1H,1’−H,20−H), 3.58(dt,1H,J=7.9Hz,1’−H), 5.03(m,1H,3−H)
上記の6位ケトン体 200.5 mg をメタノールに溶解し、氷冷下で2N水酸化カリウム1.08mlをゆっくり滴下した。室温で1日攪拌した後、5%酢酸5mlにより中和してメタノールを留去した。水を加えて酢酸エチル抽出し(30ml×3)、食塩水で洗浄した後、脱水して溶媒を留去した。シリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=1:1)により精製して、171.0mgの目的物を得た(収率93.9%)。
YS−330: m.p. 232 ℃(n−ヘキサン/酢酸エチル)
Anal. (C2644: X=0, R=−CH(CH)−O−CHCHCH(CH
H−NMR (400MHz/CDCl) 0.66(s,3H,18−CH), 0.82(s,3H,19−CH), 0.88(t,6H,24−CH), 1.06(d,3H,21−CH), 2.11−2.16(m), 2.72(t,1H,J=13Hz), 3.16−3.25(m,2H), 3.57(dt,1H), 3.97(m,1H)
【0020】
例5
(YS−510)
3−ハイドロキシ−デヒドロエピアンドロテロン3.12gをジクロルメタン50mlに溶解し、ジイソプロピルエチルアミン7.28g、続いて2−クロロメトキシエチルトリメチルシラン5.54gを室温で加えた。この混合物を室温で90分放置した後に飽和重曹水を加えて反応を停止し、水150mlおよびジクロルメタン100mlを加えてジクロルメタン層を分離した。水層をジクロルメタン(200ml×2)で抽出し、有機層をあわせて乾燥して濃縮した。残渣をシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=2:0.3)により精製して3位水酸基の保護体5.24gを得た。エタノール/水から再結晶して白色結晶を得た(m.p. 77.5−79℃) 。
H−NMR (400MHz/CDCl) 0.01(s,9H), 0.93(t,2H,J=7.0Hz), 0.88(s,3H), 1.02(s,3H), 2.08(dd,1H,J=19Hz,8.0Hz), 1.06−2.48(m,23H), 2.45(dd,1H,J=19Hz,8.0Hz), 3.43(m,1H), 3.62(t,2H,J=8.0Hz), 4.72(s,2H), 5.37(d,1H,J=5.0Hz)
上記の3位水酸基保護体5.20gのジクロルメタン溶液25mlに、ジクロルメタン40mlに溶解した70%メタクロル過安息香酸3.22gを加えて室温で30分間放置した。この混合物を10% NaHSO(100ml×2)、続いてNaHCO(150ml×2)で洗浄し、有機層を乾燥して濃縮した。残渣をシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=4:1)により精製してエポキシ体4.37gを白色結晶として得た。
H−NMR (400MHz/CDCl) 0.01(s,9H), 0.81(s,3H), 2.93(d,1H,J=4.5Hz), 3.11(d,1H,β−エポキシ体), 3.59(m,1H), 3.78(m,1H,α−エポキシ体)
上記エポキシ体4.37gをアセトン150mlおよび水12mlの混合物に溶解して過塩素酸(70%)1.4mlを滴下した。この溶液を室温で3時間放置した後、飽和重曹水を加えて反応を停止した。この混合物を濃縮して残渣をジクロルメタンおよび水に分配し、有機層を乾燥して濃縮した。残渣をシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=1:1)で精製してエポキシが開裂したジオール体3.43gを得た(収率78%)。n−ヘキサン/酢酸エチルから再結晶して白色結晶を得た(m.p. 155−157℃) 。
【0021】
上記のジオール体3.37gをエタノール120mlに溶解し、ナトリウムボロハイドライド439mgを0℃で加えた。室温で1時間攪拌した後、この混合物を濃縮し残渣をジクロルメタンおよび水に分配した。水層をジクロルメタン(2×200ml)で抽出し、有機層を合わせて乾燥して濃縮した。残渣をシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=2:3)により精製して17位ハイドロキシ体3.36gを得た。n−ヘキサン/酢酸エチルから再結晶すして白色結晶を得た(m.p. 122−123℃) 。
H−NMR (400MHz/CDCl) 0.025(s,9H), 0.75(s,3H), 0.93(t,2H,J=8,5Hz), 1.18(s,3H), 1.05−2.14(m,22H), 3.52(brs,1H), 3.63(m,3H), 3.98(m,1H), 4.72(s,2H)
【0022】
ジクロルメタン0.3mlにピリジン0.05を溶解し、50mgの上記17位ハイドロキシ体を加え、続いてブチリルクロライド0.021g(1.5当量)のジクロルメタン溶液(0.3ml)を加えた。さらに15分毎に原料が消失するまで0.5当量ずつのブチリルクロライドを加えた。ジクロルメタン20ml加えて水洗し(20ml×2)、乾燥して濃縮した。残渣をシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=2:1)により精製して17位ブチリルオキシ体50.3gを無色油状物として得た(収率78.6%)。
H−NMR (400MHz/CDCl) 0.02(s,9H), 0.80(s,3H), 0.91−2.29(m,33H), 3.53(brs,1H), 3.62(t,2H,J=8.0Hz), 3.98(m,1H), 4.61(t,2H,J=8Hz), 4.72(s,2H)
ピリジニウムクロロクロメート(PCC)0.35gおよびAl1.13gをジクロルメタン8mlに懸濁し、アルゴン雰囲気中で激しく攪拌しつつ、上記の17位ブチリルオキシ体をジクロルメタン8mlに溶解して氷冷下に加えた。室温で2時間攪拌し、後処理することなくシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=4:1)で精製して、6位ケトン体 223 mg を白色結晶として得た(収率79%)。
H−NMR (400MHz/CDCl) 0.02(s,9H), 0.81(s,3H), 0.92−2.14(m,26H), 2.26(t,2H,J=7Hz), 2.74(t,2H,J=13Hz), 3.53(brs,1H), 3.62(t,2H,J=9.0Hz), 3.87(m,1H), 4.66(t,2H,J=8Hz), 4.72(s,2H)
上記の化合物58.5mgをジクロルメタン1mlに溶解し、トリフルオロ酢酸2mlを0℃で加えた。混合物を0℃で30分間放置した後、水30mlを加えて反応を停止し、ジクロルメタン(30ml×2)で抽出した。飽和重曹水(30ml×2)で洗浄し、乾燥して濃縮した。残渣をシリカゲルカラムクロマトグラフィー(n−ヘキサン:酢酸エチル=1:4)により精製して目的物37.7mgを白色結晶として得た。
YS−510: m.p. 227−228 ℃(n−ヘキサン/酢酸エチル)
Anal. (C2336: X=O, R=−O−CO−CHCHCH
H−NMR (400MHz/CDCl) 0.77(s,3H), 0.81(s,3H), 0.94(t,3H,7−H), 1.18−2.29(m,15H), 1.69−1.60 (hex,2H,J=7.0Hz), 2.12(dd,1H,J=12.5Hz,4.5Hz), 2.22(s,1H), 2,27(t,1H,J=7.0Hz), 2.74(t,1H,J=12.5Hz), 3.96(m,1H), 4.64(2H,J=8.0Hz)
【0023】
例4および例5と同様にして以下の化合物を製造した。
【0024】
試験例
CN−TPBP(Cytosolic−Nuclear Tumor Promoter−Specific Binding Protein)を含むフラクション、およびPKC(Protein Kinase C) を含むフラクションを、以下のようにして調製した。凍結保存(−80℃)された懸濁培養ヒーラ細胞を0.6M KCl−20 mM Tris−HCl (pH 8.0) 中でホモジナイズした後に超遠心し、得られた上清をQAE−セファロースカラムクロマトグラフィーに付した。各フラクションを、ラベル化 12−O−テトラデカノイルホルボール 13−アセテート([H]TPA, NEN) を用いたTPA−特異的結合活性、PKC アッセイキット(Amersham)を用いたPKC 活性、ならびにPKCsに対する抗血清及び/又は抗体(Amersham)を用いたウエスタンブロットによりモニターして、目的のフラクションを得た。上記の化合物について、CN−TPBP に対する結合親和性を、[H]TPA をプローブとして用いたデキストラン被覆活性炭(dextran−coated charcoal) 法によりリガンド競合アッセイを行った。結果を表2に示す。
【0025】
【表2】
【0026】
【発明の効果】
発がんプロモーター結合蛋白CN−TPBP(Cytosolic−Nuclear Tumor Promoter−Specific Binding Protein)に対して強い親和性を示し、TPA 等の発がんプロモータのCN−TPBP に対する結合を拮抗的に阻害する。加えて、本発明の阻害剤は、ホルボールエステルやテレオシジンのような蛋白質リン酸化酵素活性化作用を有しないので、発がんプロモーターの作用を抑制することができ、発がんプロモーターの作用抑制剤あるいは発がん抑制剤として有用である。
[0001]
[Industrial applications]
The present invention relates to tumor promoter promoter inhibitors. More specifically, the present invention relates to a tumor promoter inhibitor that can inhibit the binding of a tumor promoter to a receptor protein and is useful as a tumor suppressor.
[0002]
[Prior art]
A carcinogenesis promoter is a substance that does not cause cancer by itself, but amplifies and modifies a biological change caused by a carcinogen to bring it to a final carcinogenic state. Typical examples thereof include phorbol esters (diterpene compounds) such as 12-O-tetradecanoyl-phorbol 13-acetate (TPA) and teleosidine (indole alkaloid).
Calcium-dependent protein kinase (PKC) is known as one of the intracellular receptors to which these tumor promoters bind. However, the substrate specificity of protein kinase is low, and the mechanism by which information on protein kinase activation is transmitted to the nucleus is not clear, and inhibitors of protein kinase do not always suppress carcinogenesis. However, the existence of receptors other than protein kinases as intracellular receptors of these tumor promoters has been strongly suggested.
[0003]
The present inventors searched for intracellular receptors to which these tumor promoters bind, and found that a plurality of intracellular receptors different from protein kinases (tumor promoter binding proteins: Tumor Promoter Binding Proteins (TBPs), Biochem. Biophys. Res.Com.166, 1126-1132, 1990), and furthermore, one of those intracellular receptors has a ligand-dependent translocation from the cytoplasm to the nucleus in a carcinogen promoter-specific binding. The protein was found to be a protein and named CN-TPBP (Cytosolic-Nuclear Tumor Promoter-Specific Binding Protein) (Jpn. J. Cancer Res. 82). , 665-675, 1991).
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a substance that competitively inhibits the binding of a carcinogenesis promoter to the above-mentioned carcinogenesis promoter-specific binding protein CN-TPBP and suppresses the action of the carcinogenesis promoter.
[0005]
[Means for Solving the Problems]
The present inventor searched the affinity of various compounds for the carcinogenesis promoter-specific binding protein CN-TPBP in order to solve the above-mentioned problems. , And found to competitively inhibit the binding of carcinogenic promoters such as TPA to CN-TPBP. The present invention has been completed based on the above findings. The tumor promoter promoter inhibitor of the present invention does not have a protein kinase activating activity such as phorbol ester or teleosidine, and thus can suppress the action of a tumor promoter and is useful for suppressing carcinogenesis.
The compound contained as an active ingredient in the inhibitor of the present invention is a steroid compound and has the following formula (I):
[0006]
Embedded image
Is a 3β, 5α-dihydroxyandrostan-6-one derivative represented by the formula: In the formula, X represents = O or —OH, and R represents —O—CO—R 1 Or -CHR 2 -R 3 (R 1 Is a straight-chain or branched alkyl group, a straight-chain or branched alkenyl group, a straight-chain or branched aralkyl group, or a substituted or unsubstituted phenyl group; 2 Is a hydrogen atom or a linear or branched lower alkyl group; 3 Is a straight or branched alkyl group, a straight or branched alkenyl group, a straight or branched alkoxy group, a straight or branched alkenyloxy group, a straight or branched aralkyl group, or a substituted or Unsubstituted phenyl group). In the above general formula (I), the hydroxyl groups at the 3- and 5-positions of the steroid skeleton have a β-configuration and an α-configuration, respectively. When X 1 represents —OH, the hydroxyl group at the 6-position may have a β-configuration. preferable. Preferably, R 1 is substituted on the steroid skeleton in the β configuration.
[0007]
Examples of the compound represented by the formula (I) include the compounds shown in Table 1 below, but the compounds contained in the inhibitor of the present invention are not limited to these compounds.
[0008]
[Table 1]
Of these, particularly preferred compounds are those wherein X is OO and R is -CH (CH 3 )-(CH 2 ) 3 CH (CH 3 ) 2 Wherein X is OO and R is -CH (CH 3 ) -O- (CH 2 ) 2 CH (CH 3 ) 2 And X is = O and R is -O-CO- (CH 2 ) 8 CH 3 Can be mentioned.
[0009]
Some of these compounds are new compounds. In these, in the above formula, X 1 represents OO, and R 2 represents —O—CO—R 1 Or -CHR 2 -R 3 It is a compound which shows. R 1 Is a straight-chain or branched alkyl group, a straight-chain or branched alkenyl group, a straight-chain or branched aralkyl group, or a substituted or unsubstituted phenyl group; 2 Is a hydrogen atom or a linear or branched lower alkyl group; 3 Is a straight or branched alkyl group, a straight or branched alkenyl group, a straight or branched alkoxy group, a straight or branched alkenyloxy group, a straight or branched aralkyl group, or a substituted or It is an unsubstituted phenyl group. Where R is -CH (CH 3 ) (CH 2 ) 3 CH (CH 3 ) 2 Never be. These compounds can be produced, for example, by the methods described in the Examples of the present specification.
[0010]
Known compounds are readily prepared by those skilled in the art according to methods described in known literature. For example, 3β, 5α-dihydroxycholestan-6-one (YS-64) and the like are described in the method of Fieser et al. (Fieser, LF, Rajagopalan, S., J. Am. Chem. Soc., 1949, 71, 3938-3941).
The inhibitor of the present invention exhibits a strong affinity for the cancer-promoting promoter binding protein CN-TPBP (Cytosolic-Nuclear Tumor Promoter-Specific Binding Protein) having a property of migrating from the cytoplasm to the nucleus in a ligand-dependent manner, Competitively inhibits the binding of oncogenic promoters such as TPA to CN-TPBP. In addition, since the inhibitor of the present invention does not have an activity of activating a protein kinase such as phorbol ester or teleosidine, it can suppress the action of a tumor promoter, and can suppress the action of a tumor promoter or suppress cancer. Useful as an agent. It is useful as a reagent for biochemistry such as a reagent for studying the mechanism of action of a tumor promoter or a screening reagent for a tumor promoter, or as a reagent for clinical examination.
[0011]
When the inhibitor of the present invention is used as a carcinogenesis inhibitor for mammals such as humans, it may be administered as a pharmaceutical composition containing the compound represented by the formula (I) as an active ingredient. Such a pharmaceutical composition may be orally or parenterally administered to a patient. For example, tablets, capsules, powders, fine granules, granules, liquids, syrups and the like for oral administration It may be administered as a pharmaceutical composition or a parenteral administration pharmaceutical composition such as an injection, a suppository, an inhalant, an eye drop, a nasal drop, an ointment, and a patch. These pharmaceutical compositions may be prepared by adding pharmacologically and pharmaceutically acceptable additives. Examples of pharmacologically and pharmaceutically acceptable additives include, for example, excipients, disintegrants or disintegration aids, binders, lubricants, coating agents, pigments, diluents, bases, and dissolving agents Examples thereof include a solubilizing agent, a tonicity agent, a pH adjuster, a stabilizer, a propellant, and a pressure-sensitive adhesive, which are appropriately selected by those skilled in the art according to the purpose.
[0012]
For example, pharmaceutical compositions suitable for oral administration or transdermal or transmucosal administration include excipients such as glucose, lactose, D-mannitol, starch, and crystalline cellulose; carboxymethylcellulose, starch, and calcium carboxymethylcellulose. Disintegrants or disintegration aids; binders such as hydroxypropylcellulose, hydroxypropylmethylcellulose, polyvinylpyrrolidone or gelatin; lubricants such as magnesium stearate or talc; hydroxypropylmethylcellulose, sucrose, polyethylene glycol or titanium oxide Coating agents; bases such as petrolatum, liquid paraffin, polyethylene glycol, gelatin, kaolin, glycerin, purified water, or hard fat; jets of freon, diethyl ether, or compressed gas Agent; sodium polyacrylate, polyvinyl alcohol, methyl cellulose, polyisobutylene, adhesives of polybutene; a pharmaceutical additives of the base fabric such as cotton cloth or plastic sheet or the like can be added. Pharmaceutical compositions suitable for injection include solubilizing agents or solubilizing agents which can constitute aqueous or ready-to-use injections such as distilled water for injection, physiological saline, and propylene glycol; glucose, sodium chloride, D- Pharmaceutical additives such as isotonic agents such as mannitol and glycerin; pH regulators such as inorganic acids, organic acids, inorganic bases and organic bases may be added. When administering the above-mentioned pharmaceutical composition for the purpose of preventing carcinogenesis, the dose may be appropriately selected according to the purpose.For example, 0.1 to 10 mg as an active ingredient per adult day may be administered. Just fine.
[0013]
【Example】
Hereinafter, the present invention will be described more specifically with reference to Examples, but the present invention is not limited to these Examples.
Example 1: 3β, 5α-dihydroxy-23,24-bisnorcholan-6-one (YS-149)
After selective oxidation of stigmasteryl acetate with metachloroperbenzoic acid, it was hydrolyzed in the presence of a catalytic amount of perchloric acid to give 3β-acetoxy-stigmasto-22-en-5α, 6β-diol. . This compound is oxidized with pyridinium chlorochromate in the presence of aluminum oxide, and the 6-position ketone is protected with an ethylenedioxy group to give 3β-acetoxy-6,6-ethylenedioxystigmasto-22-ene-5α-. Got an oar. This compound was ozonolyzed in methanol-dichloromethane-pyridine to give bisnorcholane-22-al.
[0014]
Bisnorcholane-22-al was treated with hydrazine hydrate and potassium hydroxide in ethylene glycol to deprotect the 6-position ketone to obtain 3β, 5α-dihydroxy-23,24-bisnorcholan-6-one.
YS-149: colorless needles m. p. 149-150 ° C (ethanol / n-hexane)
Anal. (C 22 H 36 O 3 : R = -CH (CH 3 ) 2 )
1 H-NMR (CDCl 3 ) 0.64 (s, 3H, 18-CH 3 ), 0.81 (s, 3H, 19-CH 3 ), 0.84 (d, 3H, J = 6.6 Hz, 22-CH 3 ), 0.92 (d, 3H, J = 6.6 Hz, 21-CH 3 ), 2.01 (bd, 1H), 2.13 (dd, 1H, J = 12.8 & 4.8 Hz, 7-beta-H), 2.70 (t, 1H, J = 12.8 Hz, 7-alpha-H), 3.97 (m, 1H, 3-alpha-H)
[0015]
Example 2: Side chain extension of 3β, 5α-dihydroxy-23,24-bisnorcholan-6-one (YS-149)
Bisnorcholane-22-al was treated with the appropriate phosphonium ylide in tetrahydrofuran to give a 22-unsaturated compound as a mixture of cis and trans forms. The ketone at the 6-position was deprotected by the method described in Example 1, and the double bond at the 22-position was catalytically reduced to give 3β, 5α-dihydroxy-23,24-bisnorcholan-6-one (YS-149). A side chain elongate was obtained.
[0016]
Example 3: 3b, 5a-Dihydroxycholest-22E-en-6-one (YS-126)
Bisnorcholane-22-al was treated with isoamyltriphenylphosphonium ylide in tetrahydrofuran to obtain a trans-22-ene form. The 6-keto group and the 3beta hydroxyl group were deprotected to obtain the target compound.
YS-126: m. p. 235-238 ° C (ethyl acetate)
Anal. (C 27 H 44 O 3 : R = -CH (CH 3 ) CH = CHCH 2 CH (CH 3 ) 2 )
1 H-NMR (CDCl 3 ) 0.68 (s, 3H, 18-CH 3 ), 0.81 (s, 3H, 19-CH 3 ), 0.88, 0.89 (d, 2 × 3H, J = 6.6 Hz, 26-, 27-CH 3 ), 0.95 (d, 3H, J = 6.6 Hz, 21-CH 3 ), 2.01 (bd, 1H), 2.13 (dd, 1H, J = 12.7 & 4.7 Hz, 7-beta-H), 2.41 (m, 1H, 20-H), 2 0.71 (t, 1H, J = 12.7 Hz, 7-alpha-H), 3.97 (m, 1H, 3-alpha-H), 5.18 (m, 2H, 22-, 23H)
[0017]
Example 4
5.00 g of pregnenolone was dissolved in a mixture of 15 ml of dimethylformamide and 15 ml of tetrahydrofuran, and 4.395 g (3 equivalents) of imidazole was added. Under ice cooling, 3.685 g of tert-butyldimethylsilyl chloride (about 1.5 equivalents) was added, and the mixture was stirred for 10 hours. The solvent was distilled off by adding 30 ml of water, extracted with dichloromethane, washed with water and dehydrated, and then the solvent was distilled off. The residue was purified by silica gel column chromatography (ethyl acetate: n-hexane = 10: 1) to obtain 6.57 g of a protected silylated hydroxyl group at the 3-position (yield 96.5%). Recrystallization from ethyl acetate gave colorless columnar crystals (mp 164.5-165 ° C).
[0018]
3.35 g of the above silyl compound was dissolved in a mixture of 50 ml of ethanol and 50 ml of tetrahydrofuran, and 0.90 g of sodium borohydride was added under ice-cooling, followed by stirring at room temperature for 5 hours. 5% acetic acid was added to the solution, the solvent was distilled off, water was added and extracted with dichloromethane. After washing with water and dehydration, the solvent was distilled off, and the residue was purified by silica gel column chromatography (ethyl acetate: n-hexane = 7: 1) to obtain 2.44 g of a compound in which the carbonyl group at position 20 was reduced to a hydroxyl group (yield). 72.4%). Recrystallization from methanol gave colorless needles (mp 151 ° C.).
138.8 mg of sodium hydride was washed with n-hexane (1 ml × 3), suspended in 1 ml of xylene, 606.7 mg of the above compound was dissolved in 4 ml of xylene and added, and 0.87 ml of isopentyl chloride was added. Refluxed for 17 hours. After adding 10% citric acid and water, the mixture was extracted with dichloromethane, washed with water and dehydrated, and the solvent was distilled off. The residue was purified by silica gel column chromatography (n-hexane: dichloromethane = 3: 1) to obtain 490.8 mg of a compound having an isopentyloxy group introduced at the 20-position (yield: 69.7%). Recrystallization from methanol gave colorless needles (mp 82 ° C.).
1 H-NMR (400 MHz / CDCl 3 ) 0.05 (s, 6H, TBDMS Me), 0.69 (s, 3H, 18-CH 3 ), 0.88 (s, 9H, TBDMS t-Bu), 0.90 (d, 6H, J = 6.5 Hz, 4'-CH) 3 ), 1.00 (s, 3H, 19-CH 3 ), 1.06 (d, 3H, J = 6.0 Hz, 21-CH) 3 ), 3.22 (dt, 1H, J = 7.9 Hz, 1'-H), 3.25 (m, 1H, 20-H), 3.47 (m, 1H, 3-H), 3. 57 (dt, 1H, J = 7.9 Hz, 1'-H), 5.31 (dd, 1H, J = 5.0 Hz, 6-H)
The above compound (547.0 mg) was dissolved in acetone (23 mg), and a mixture of perchloric acid (0.05 ml), water (0.05 ml), and acetone (2 ml) was added under ice cooling. After stirring at room temperature for 3 hours, 6 ml of saturated aqueous sodium hydrogen carbonate was added to distill off acetone, and water was added, followed by extraction with dichloromethane (30 ml × 3). After washing with water and dehydration, the solvent was distilled off, and the residue was purified by silica gel column chromatography (n-hexane: ethyl acetate = 4: 1) to obtain 398.5 mg of the deprotected compound for the hydroxyl group at the 3-position (yield). 94.1%). Recrystallization from n-hexane: ethyl acetate gave colorless needles (mp 155 ° C).
1 H-NMR (400 MHz / CDCl 3 ) 0.69 (s, 3H, 18-CH 3 ), 0.90 (d, 6H, J = 6.5 Hz, 4'-CH 3 ), 1.02 (s, 3H, 19-CH 3 ), 1.06 (d, 3H, J = 6.0 Hz, 21-CH) 3 ), 3.21 (dt, 1H, J = 7.9 Hz, 1'-H), 3.23 (m, 1H, 20-H), 3.50-3.58 (m, 2H, 3-H). , 1′-H), 5.35 (dd, 1H, J = 5.5 Hz, 6-H)
371.2 mg of the above deprotected compound was dissolved in 2 ml of dichloromethane, 0.4 ml of pyridine was added, and 0.55 ml of acetic anhydride was added dropwise, followed by stirring at room temperature for 1 day. Dichloromethane (50 ml) was added, and the mixture was washed with 2N hydrochloric acid (30 ml × 2), saturated aqueous sodium bicarbonate (30 ml × 2) and water (50 ml). After dehydration, the solvent was distilled off. Purification by silica gel column chromatography (n-hexane: ethyl acetate = 10: 1) gave 387.0 mg of the 3-position acetoxy compound (yield 94.1%). Recrystallization from methanol gave colorless needles (mp 75.5-76 ° C).
1 H-NMR (400 MHz / CDCl 3 ) 0.69 (s, 3H, 18-CH 3 ), 0.90 (d, 6H, J = 6.5 Hz, 4'-CH 3 ), 1.02 (s, 3H, 19-CH 3 ), 1.06 (d, 3H, J = 6.0 Hz, 21-CH) 3 ), 2.03 (s, 3H, AcO), 2.32 (d, 2H, J = 7.0 Hz, 4-H), 3.21 (dt, 1H, J = 7.9 Hz, 1'-H). ), 3.24 (m, 1H, 20-H), 3.57 (dt, 1H, J = 7.9 Hz, 1'-H), 4.60 (m, 1H, 3-H), 5. 37 (dd, 1H, J = 5.0 Hz, 6-H)
[0019]
368.7 mg of the acetoxy compound was dissolved in 2 ml of dichloromethane, 216.7 mg of metachloroperbenzoic acid was dissolved in 4 ml of dichloromethane, and the mixture was added under ice-cooling, followed by stirring at room temperature for 80 minutes. Add 40 ml of dichloromethane and add 10% NaHSO 3 (30 ml × 2), saturated aqueous sodium bicarbonate (30 ml × 2) and water (50 ml), and after dehydration, the solvent was distilled off. Purification by silica gel column chromatography (n-hexane: ethyl acetate = 10: 1) gave 283.5 mg of an epoxy compound as a colorless oil (yield: 74.1%).
Main products:
1 H-NMR (400 MHz / CDCl 3 ) 0.62 (s, 3H, 18-CH 3 ), 0.88 (d, 6H, J = 7.0 Hz, 4'-CH 3 ), 1.04 (d, 3H, J = 6.0 Hz, 21-CH) 3 ), 1.08 (s, 3H, 19-CH 3 ), 2.01 (s, 3H, AcO), 2.88 (d, 1H, J = 4.5 Hz, 6-H), 3.15-3.25 (m, 2H, 1'-H, 20) -H), 3.55 (m, 1H, 1'-H), 4.95 (m, 1H, 3-H),
By-products:
1 H-NMR (400 MHz / CDCl 3 ) 0.65 (s, 3H, 18-CH 3 ), 0.88 (d, 6H, J = 7.0 Hz, 4'-CH 3 ), 1.01 (s, 3H, 19-CH 3 ), 1.04 (d, 3H, J = 6.0 Hz, 21-CH) 3 ), 2.03 (s, 3H, AcO), 3.07 (d, 1H, J = 4.0 Hz, 6-H), 3.15-3.25 (m, 2H, 1'-H, 20) -H), 3.55 (m, 1H, 1'-H), 4.76 (m, 1H, 3-H),
273.8 mg of the above epoxy compound was dissolved in 8 ml of acetone, a mixture of 0.05 ml of perchloric acid, 0.05 ml of water and 2 ml of acetone was added under ice-cooling, and the mixture was stirred at room temperature for 7 hours. Acetone was distilled off by adding 2 ml of saturated sodium bicarbonate solution, water was added, and the mixture was extracted with ethyl acetate (30 ml × 2). The extract was washed with saturated saline, dehydrated, and the solvent was distilled off. The residue was purified by silica gel column chromatography (n-hexane: ethyl acetate = 2: 1) to obtain 262.8 mg of a diol having an epoxy ring-opened. Obtained as a colorless solid (yield 92.5%).
1 H-NMR (400 MHz / CDCl 3 ) 0.69 (s, 3H, 18-CH 3 ), 0.89 (d, 6H, J = 7.0 Hz, 4'-CH 3 ), 1.05 (d, 3H, J = 6.0 Hz, 21-CH) 3 ), 1.19 (s, 3H, 19-CH 3 ), 2.02 (s, 3H, AcO), 3.19 (dt, 1H, J = 7.9 Hz, 1'-H), 3.24 (m, 1H, 20-H), 3.53-. 3.56 (m, 2H, 1'-H, 6H), 5.15 (m, 1H, 3-H)
0.34 g of pyridinium chlorochromate, Al 2 O 3 To 1.14 g, 3 ml of dichloromethane was added and the atmosphere was replaced with argon, and 242.8 mg of the above diol was dissolved in 3 ml of dichloromethane while stirring vigorously and added under ice-cooling. The mixture was stirred at room temperature for 2.5 hours, and purified by silica gel column chromatography (n-hexane: ethyl acetate = 5: 1) without post-treatment to obtain 225.3 mg of the 6-position ketone (yield: 93). .1%). Recrystallization from n-hexane gave colorless needles (mp 177 ° C).
1 H-NMR (400 MHz / CDCl 3 ) 0.65 (s, 3H, 18-CH 3 ), 0.83 (s, 3H, 19-CH 3 ), 0.89 (d, 6H, J = 6.5 Hz, 4'-CH 3 ), 1.06 (d, 3H, J = 6.0 Hz, 21-CH) 3 ), 2.02 (s, 3H, AcO), 2.12 (dd, 1H, J = 5.14 Hz, 7-beta-H), 2.75 (t, 1H, J = 13 Hz, 7-alpha-). H), 3.16-3.27 (m, 1H, 1'-H, 20-H), 3.58 (dt, 1H, J = 7.9 Hz, 1'-H), 5.03 (m , 1H, 3-H)
200.5 mg of the above ketone at the 6-position was dissolved in methanol, and 1.08 ml of 2N potassium hydroxide was slowly added dropwise with ice cooling. After stirring at room temperature for 1 day, the mixture was neutralized with 5 ml of 5% acetic acid and methanol was distilled off. Water was added and the mixture was extracted with ethyl acetate (30 ml × 3), washed with brine, dehydrated and the solvent was distilled off. Purification by silica gel column chromatography (n-hexane: ethyl acetate = 1: 1) gave 171.0 mg of the desired product (yield 93.9%).
YS-330: m. p. 232 ° C (n-hexane / ethyl acetate)
Anal. (C 26 H 44 O 4 : X = 0, R = -CH (CH 3 ) -O-CH 2 CH 2 CH (CH 3 ) 2 )
1 H-NMR (400 MHz / CDCl 3 ) 0.66 (s, 3H, 18-CH) 3 ), 0.82 (s, 3H, 19-CH 3 ), 0.88 (t, 6H, 24-CH 3 ), 1.06 (d, 3H, 21-CH 3 2.) (2.11, 2.16 (m)), 2.72 (t, 1H, J = 13 Hz), 3.16-3.25 (m, 2H), 3.57 (dt, 1H), 97 (m, 1H)
[0020]
Example 5
(YS-510)
3.12 g of 3-hydroxy-dehydroepiandrosterone was dissolved in 50 ml of dichloromethane, and 7.28 g of diisopropylethylamine and 5.54 g of 2-chloromethoxyethyltrimethylsilane were added at room temperature. After the mixture was left at room temperature for 90 minutes, saturated sodium bicarbonate solution was added to stop the reaction, and 150 ml of water and 100 ml of dichloromethane were added to separate a dichloromethane layer. The aqueous layer was extracted with dichloromethane (200 ml × 2), and the combined organic layers were dried and concentrated. The residue was purified by silica gel column chromatography (n-hexane: ethyl acetate = 2: 0.3) to obtain 5.24 g of a protected 3-hydroxyl group. Recrystallization from ethanol / water gave white crystals (mp 77.5-79 ° C).
1 H-NMR (400 MHz / CDCl 3 ) 0.01 (s, 9H), 0.93 (t, 2H, J = 7.0 Hz), 0.88 (s, 3H), 1.02 (s, 3H), 2.08 (dd, 1H) , J = 19 Hz, 8.0 Hz), 1.06-2.48 (m, 23H), 2.45 (dd, 1H, J = 19 Hz, 8.0 Hz), 3.43 (m, 1H), 3 0.62 (t, 2H, J = 8.0 Hz), 4.72 (s, 2H), 5.37 (d, 1H, J = 5.0 Hz)
To 25 ml of a dichloromethane solution of 5.20 g of the protected 3-position hydroxyl group was added 3.22 g of 70% metachloroperbenzoic acid dissolved in 40 ml of dichloromethane, and the mixture was allowed to stand at room temperature for 30 minutes. This mixture is added to 10% NaHSO 3 (100 ml × 2), followed by NaHCO 3 (150 ml × 2), and the organic layer was dried and concentrated. The residue was purified by silica gel column chromatography (n-hexane: ethyl acetate = 4: 1) to obtain 4.37 g of an epoxy compound as white crystals.
1 H-NMR (400 MHz / CDCl 3 2.) 0.01 (s, 9H), 0.81 (s, 3H), 2.93 (d, 1H, J = 4.5 Hz), 3.11 (d, 1H, β-epoxy), 59 (m, 1H), 3.78 (m, 1H, α-epoxy)
4.37 g of the above epoxy compound was dissolved in a mixture of 150 ml of acetone and 12 ml of water, and 1.4 ml of perchloric acid (70%) was added dropwise. After leaving this solution at room temperature for 3 hours, saturated aqueous sodium hydrogen carbonate was added to stop the reaction. The mixture was concentrated and the residue was partitioned between dichloromethane and water, and the organic layer was dried and concentrated. The residue was purified by silica gel column chromatography (n-hexane: ethyl acetate = 1: 1) to obtain 3.43 g of an epoxy-cleaved diol (78% yield). Recrystallization from n-hexane / ethyl acetate gave white crystals (mp 155-157 ° C).
[0021]
3.37 g of the above diol was dissolved in 120 ml of ethanol, and 439 mg of sodium borohydride was added at 0 ° C. After stirring at room temperature for 1 hour, the mixture was concentrated and the residue was partitioned between dichloromethane and water. The aqueous layer was extracted with dichloromethane (2 × 200 ml), and the combined organic layers were dried and concentrated. The residue was purified by silica gel column chromatography (n-hexane: ethyl acetate = 2: 3) to obtain 3.36 g of a 17-position hydroxy compound. Recrystallization from n-hexane / ethyl acetate gave white crystals (mp 122-123 ° C).
1 H-NMR (400 MHz / CDCl 3 ) 0.025 (s, 9H), 0.75 (s, 3H), 0.93 (t, 2H, J = 8.5 Hz), 1.18 (s, 3H), 1.05-2.14 (M, 22H), 3.52 (brs, 1H), 3.63 (m, 3H), 3.98 (m, 1H), 4.72 (s, 2H)
[0022]
Pyridine 0.05 was dissolved in 0.3 ml of dichloromethane, 50 mg of the above hydroxy compound at position 17 was added, and then a solution of 0.021 g (1.5 equivalents) of butyryl chloride in 0.3 ml of dichloromethane was added. Further, 0.5 equivalent of butyryl chloride was added every 15 minutes until the raw material disappeared. 20 ml of dichloromethane was added, washed with water (20 ml × 2), dried and concentrated. The residue was purified by silica gel column chromatography (n-hexane: ethyl acetate = 2: 1) to obtain 50.3 g of a 17-butyryloxy compound as a colorless oil (yield 78.6%).
1 H-NMR (400 MHz / CDCl 3 ) 0.02 (s, 9H), 0.80 (s, 3H), 0.91-2.29 (m, 33H), 3.53 (brs, 1H), 3.62 (t, 2H, J = 8.0 Hz), 3.98 (m, 1H), 4.61 (t, 2H, J = 8 Hz), 4.72 (s, 2H)
0.35 g of pyridinium chlorochromate (PCC) and Al 2 O 3 1.13 g was suspended in 8 ml of dichloromethane, and while stirring vigorously in an argon atmosphere, the above 17-butyryloxy compound was dissolved in 8 ml of dichloromethane and added under ice cooling. The mixture was stirred at room temperature for 2 hours and purified by silica gel column chromatography (n-hexane: ethyl acetate = 4: 1) without post-treatment to obtain 223 mg of the 6-position ketone as white crystals (yield 79%). ).
1 H-NMR (400 MHz / CDCl 3 ) 0.02 (s, 9H), 0.81 (s, 3H), 0.92-2.14 (m, 26H), 2.26 (t, 2H, J = 7 Hz), 2.74 (t , 2H, J = 13 Hz), 3.53 (brs, 1H), 3.62 (t, 2H, J = 9.0 Hz), 3.87 (m, 1H), 4.66 (t, 2H, J = 8 Hz), 4.72 (s, 2H)
The above compound (58.5 mg) was dissolved in dichloromethane (1 ml), and trifluoroacetic acid (2 ml) was added at 0 ° C. After allowing the mixture to stand at 0 ° C. for 30 minutes, the reaction was stopped by adding 30 ml of water, and extracted with dichloromethane (30 ml × 2). The extract was washed with saturated aqueous sodium hydrogen carbonate (30 ml × 2), dried and concentrated. The residue was purified by silica gel column chromatography (n-hexane: ethyl acetate = 1: 4) to give 37.7 mg of the desired product as white crystals.
YS-510: m. p. 227-228 ° C (n-hexane / ethyl acetate)
Anal. (C 23 H 36 O 5 : X = O, R = -O-CO-CH 2 CH 2 CH 3 )
1 H-NMR (400 MHz / CDCl 3 ) 0.77 (s, 3H), 0.81 (s, 3H), 0.94 (t, 3H, 7-H), 1.18-2.29 (m, 15H), 1.69-1 .60 (hex, 2H, J = 7.0 Hz), 2.12 (dd, 1H, J = 12.5 Hz, 4.5 Hz), 2.22 (s, 1H), 2, 27 (t, 1H, J = 7.0 Hz), 2.74 (t, 1H, J = 12.5 Hz), 3.96 (m, 1H), 4.64 (2H, J = 8.0 Hz)
[0023]
The following compounds were prepared in the same manner as in Examples 4 and 5.
[0024]
Test example
A fraction containing CN-TPBP (Cytosolic-Nuclear Tumor Promoter-Specific Binding Protein) and a fraction containing PKC (Protein Kinase C) were prepared as follows. The suspension-cultured HeLa cells cryopreserved (−80 ° C.) were homogenized in 0.6 M KCl-20 mM Tris-HCl (pH 8.0), and then ultracentrifuged. Chromatography. Each fraction was labeled with 12-O-tetradecanoylphorbol 13-acetate ([ 3 H] TPA, NEN), PKC activity using a PKC assay kit (Amersham), and Western blot using an antiserum and / or antibody (Amersham) against PKCs, The desired fraction was obtained. For the above compounds, the binding affinity for CN-TPBP was 3 [H] TPA was used as a probe to perform a ligand competition assay by a dextran-coated charcoal method. Table 2 shows the results.
[0025]
[Table 2]
[0026]
【The invention's effect】
Shows strong affinity for the tumor-promoting promoter-binding protein CN-TPBP (Cytosolic-Nuclear Tumor Promoter-Specific Binding Protein) and competitively inhibits the binding of a carcinogenesis promoter such as TPA to CN-TPBP. In addition, since the inhibitor of the present invention does not have an activity of activating a protein kinase such as phorbol ester or teleosidine, it can suppress the action of a tumor promoter, and can suppress the action of a tumor promoter or suppress cancer. Useful as an agent.

Claims (2)

以下の式:
〔式中、X は=Oを示し、R は-O-CO-R1または-CHR2-R3を示す(R1は直鎖または分枝したアルキル基、直鎖または分枝したアルケニル基、直鎖または分枝したアラルキル基、あるいは置換または非置換フェニル基であり、R2は水素原子、あるいは直鎖または分枝した低級アルキル基であり、R3は直鎖または分枝したアルキル基、直鎖または分枝したアルケニル基、直鎖または分枝したアルコキシ基、直鎖または分枝したアルケニルオキシ基、直鎖または分枝したアラルキル基、あるいは置換または非置換フェニル基である)〕で示される化合物を有効成分として含む発がんプロモーター阻害剤。
The following formula:
[Wherein, X represents OO, R represents —O—CO—R 1 or —CHR 2 —R 3 (R 1 represents a straight-chain or branched alkyl group, a straight-chain or branched alkenyl group) A straight-chain or branched aralkyl group, or a substituted or unsubstituted phenyl group, R 2 is a hydrogen atom, or a straight-chain or branched lower alkyl group, and R 3 is a straight-chain or branched alkyl group A straight-chain or branched alkenyl group, a straight-chain or branched alkoxy group, a straight-chain or branched alkenyloxy group, a straight-chain or branched aralkyl group, or a substituted or unsubstituted phenyl group)] A carcinogenesis promoter inhibitor comprising the indicated compound as an active ingredient.
発がんプロモーターがホルボールエステル類およびテレオシジン類からなる群から選ばれる請求項1記載の阻害剤。The inhibitor according to claim 1, wherein the carcinogenesis promoter is selected from the group consisting of phorbol esters and teleosidines.
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