【発明の詳細な説明】[Detailed description of the invention]
〔産業上の利用分野〕
本発明は新規なフレデリカマイシンA誘導体、
更に詳細には次の一般式()
(式中、mは0〜4の数を、nは1〜4の数を示
す)
で表わされるフレデリカマイシンA誘導体に関す
る。
〔従来の技術〕
従来、ストレプトミセス グリセウス
(Streptomyces griseus)FCRC―48の培養物か
ら次式()
で表わされる抗腫瘍抗生物質、フレデリカマイシ
ンA〔Fredericamycin A(NSC―305263)〕が単
離されることが知られている〔J.Antibiotics34
巻、1389〜1401頁(1981)及び同34巻、1402〜
1407頁(1981)〕。
〔発明が解決しようとする問題点〕
しかしながら、このフレデリカマイシンAは抗
菌作用が弱く、また不安定であるという難点があ
つた。
〔問題点を解決するための手段〕
そこで、本発明者はフレデリカマイシンAの斯
かる欠点を克服せんと、種々の誘導体を合成し、
その薬理作用及び安定性を検討していたところ、
上記式()で表わされるフレデリカマイシンA
誘導体が優れた抗腫瘍作用を有し、しかもフレデ
リカマイシンAに比較して極めて安定であること
を見出し本発明を完成した。
従つて、本発明は制癌剤として有用なフレデリ
カマイシンA誘導体()を提供するものであ
る。
本発明のフレデリカマイシンA誘導体()
は、フレデリカマイシンA()を適当な還元剤
で還元した後、これをアセチル化することによつ
て製造される次式()
で表わされるロイコテトラアセチルテトラハイド
ロフレデリカマイシンAをアルキル化反応に付す
ることによつて製造される。このアルキル化反応
はヨウ化アルキル―酸化銀法を用い、アセトン、
ジオキサン、1,2―ジメトキシエタンなどの溶
媒中、55〜80℃の温度で0.5〜5.0時間行なうのが
好ましい。
〔作用〕
このようにして得られた本発明の代表的化合物
について、その抗腫瘍作用及び安定性を試験した
結果は次のとおりである。
(1) 抗腫瘍作用
フレデリカマイシンA誘導体()のエールリ
ツヒカルシノーマ(Ehrlich)に対する治療効果
を下記方法により試験した。結果を第1表に示
す。なお、表中の延命効果は無処理群の生存日数
(C)に対する治療群の生存日数(T)の比を百
分率を以つて表わした。
実験方法:
5×106個の腫瘍細胞をICRマウス(♀、日本
クレア)の腹腔内に移植し、24時間後より実施例
1で得られた化合物1を1日1回計10回腹腔内に
投与し、投与開始後45日間観察を続けた。
[Industrial Application Field] The present invention provides novel fredericamycin A derivatives,
In more detail, the following general formula () (In the formula, m represents a number from 0 to 4, and n represents a number from 1 to 4.) [Prior art] Conventionally, from a culture of Streptomyces griseus (Streptomyces griseus) FCRC-48, the following formula () It is known that Fredericamycin A (NSC-305263), an antitumor antibiotic expressed by
Volume, pp. 1389-1401 (1981) and Vol. 34, pp. 1402-
1407 pages (1981)]. [Problems to be Solved by the Invention] However, this fredericamycin A has the drawbacks of weak antibacterial activity and instability. [Means for Solving the Problems] Therefore, the present inventor synthesized various derivatives in order to overcome the drawbacks of fredericamycin A.
While examining its pharmacological action and stability,
Fredericamycin A represented by the above formula ()
The present invention was completed by discovering that the derivative has excellent antitumor activity and is extremely stable compared to fredericamycin A. Therefore, the present invention provides fredericamycin A derivatives () useful as anticancer agents. Fredericamycin A derivative of the present invention ()
is the following formula () produced by reducing fredericamycin A () with an appropriate reducing agent and then acetylating it. It is produced by subjecting leucotetraacetyltetrahydrofredericamycin A represented by the formula to an alkylation reaction. This alkylation reaction uses alkyl iodide-silver oxide method, and acetone,
Preferably, the reaction is carried out in a solvent such as dioxane or 1,2-dimethoxyethane at a temperature of 55 to 80°C for 0.5 to 5.0 hours. [Effect] The results of testing the antitumor activity and stability of the representative compound of the present invention thus obtained are as follows. (1) Antitumor effect The therapeutic effect of fredericamycin A derivative () on Ehrlich carcinoma (Ehrlich) was tested by the following method. The results are shown in Table 1. In addition, the survival effect in the table is expressed as a percentage of the ratio of survival days (T) of the treated group to the survival days (C) of the untreated group. Experimental method: 5 × 10 6 tumor cells were intraperitoneally transplanted into ICR mice (♀, CLEA Japan), and 24 hours later, Compound 1 obtained in Example 1 was intraperitoneally administered once a day for a total of 10 times. was administered, and observation was continued for 45 days after the start of administration.
【表】
(2) 安定性
フレデリカマイシンA誘導体()及びフレデ
リカマイシンA()の水溶液中での安定性を下
記方法により試験した。結果を第2表に示す。
実験方法:
実施例1で得られた化合物1及びフレデリカマ
イシンAをそれぞれジメチルスルホキシドに溶か
し、生理食塩水を用いて希釈し、被検化合物の最
終濃度を10μg/mlに調整した。得られた検液に
つき、高速液体クロマトグラフ法(HPLC法)に
より、所定時間後の被検化合物の残存率を測定し
た。[Table] (2) Stability The stability of fredericamycin A derivative () and fredericamycin A () in an aqueous solution was tested by the following method. The results are shown in Table 2. Experimental method: Compound 1 obtained in Example 1 and Fredericamycin A were each dissolved in dimethyl sulfoxide, diluted with physiological saline, and the final concentration of the test compound was adjusted to 10 μg/ml. For the obtained test solution, the residual rate of the test compound after a predetermined time was measured by high performance liquid chromatography (HPLC method).
〔発明の効果〕〔Effect of the invention〕
上記安定性試験の結果から明らかな如く、本発
明化合物は抗腫瘍活性を有し、しかもフレデリカ
マイシンAに比べ高い安定性を有する。
〔実施例〕
次に参考例及び実施例を挙げ、本発明を説明す
る。
参考例
ロイコテトラアセチルテトラハイドロフレデリ
カマイシンA()の製造:
フレデリカマイシンA0.50gをテトラハイドロ
フラン30mlに溶解し、10%パラジウム炭素0.05g
を加え、室温にて撹拌下接触還元を行つた。10時
間反応後、反応液に窒素気流中ピリジン10mlおよ
び無水酢酸1mlを加え、さらに室温で1時間撹拌
した。この反応液を過し、液を氷冷したn―
ヘキサン中に撹拌しながら加え、生じた沈殿を
取した、この沈殿物をクロロホルム―酢酸エチル
混液より再結晶すると、ロイコテトラアセチルテ
トラハイドロフレデリカマイシンA()の黄色
結晶0.53g(収率80%)が得られた。
融点 273℃(分解)
UV λジオキサン
max nm(ε)
241(51300),287(68400),338(17100),352
(20000)
IR νKBr naxcm-1
1780,1740,1715,1660,1650,1620
1H―NMR δ ppm(DMSO d―6)
12.96(s,1H),11.52(s,1H),7.87(s,
1H),6.90(s,1H),6.35(s,1H),3.96
(s,3H),3.16(t,2H),2.5(m,4H),
2.44(s,12H),1.8〜1.1(m,6H),0.80
(t,3H)
Mass M+ m/z 713
元素分析値(%) C38H35NO13(分子量713.69)
として
C H N
実験値 63.93 4.95 1.93
理論値 63.95 4.94 1.96
実施例 1
ロイコテトラアセチルテトラハライドフレデリ
カマイシンA()2.14g(3mmol)に酸化銀
3.48g(15mmol)とアセトン200mlを加えて、加
熱還流撹拌下、ヨウ化メチル15mlを約15分間かけ
て滴下した。滴下終了後、同条件下で1時間加熱
し、冷後無機物をろ過して除き、液を減圧乾固
した。残渣をシリカゲルカラムクロマトグラフイ
ーによる精製を行ない、5%(v/v)アセトン
―トルエン混液溶出分画より得た黄色結晶をイソ
プロピルエーテル―アセトン混液より再結晶し
て、ロイコテトラアセチルテトラハイドロフレデ
リカマイシンAのジメチル体〔()式中、m=
1,n=1(化合物1)〕の淡黄色結晶1.25g(収
率56.3%)を得た。
融点 147〜149℃
UV λEtOH nax nm(ε)
241(52400),285(68600),323(7900),337
(9800),360(10000)
IRνKBr naxcm-1
1785,1745,1715,1620 第1図1
H―NMR δ ppm(CDCl3)
7.26(s,1H),7.21(s,1H),6.88(s,
1H),3.97(s,3H),3.91(s,3H),3.38
(s,3H),3.31(t,2H),2.6(m,4H),
2.47(s,3H),2.46(s,3H),2.41(s,
6H),1.9〜1.2(m,6H),0.89(t,3H)
第2図
Mass M+ m/z 741
実施例 2
実施例1においてヨウ化メチルの代わりにヨウ
化エチルを用いる以外は実施例1と同様にして
()式中、m=2、n=2の化合物(化合物2)
を得た。
融点 131〜132℃ 淡黄色結晶
UV λEtOH nax nm(ε)
241(52200),285(67400),323(7800),337
(9800),360(9900)
IR νKBr nax cm-1
1780,1740,1710,1620
1H―NMR δ ppm (CDCl3)
7.28(s,1H),7.24(s,1H),6.89(s,
1H),4.48(q,2H),3.94(s,3H),3.62
(q,2H),3.33(t,2H),2.6(m,4H),
2.48(s,3H),2.46(s,3H),2.41(s,
6H),1.9〜1.2(m,9H),0.88(t,3H),
0.71(t,3H)
Mass M+ m/z 769
実施例 3,4
ロイコテトラアセチルテトラハイドロフレデリ
カマイシンA()0.71g(1mmol)に酸化銀
1.16g(5mmol)と無水ジオキサン50mlを加え
て、70〜75℃撹拌下、ヨウ化ブチル5mlを約10分
間かけて滴下した。滴下終了後、同条件下で30分
間加熱し、冷後無機物を過して除き、液を減
圧乾固した。残渣をシリカゲルクロマトグラフイ
ーによる分離精製を行ない。まず2%(v/v)
アセトン―トルエン混液溶出分画より得た黄色結
晶をイソプロピルエーテル―アセトン混液より再
結して、ロイコテトラアセチルテトラハイドロフ
レデリカマイシンAのジブチル体〔()式中、
m=4,n=4(化合物3)〕の淡黄色結晶0.11g
(収率13.3%)を得た。
融点 104〜105℃
UV λEtOH nax nm(ε)
241(53900)、286(69200)、323(8400)、337
(10300)、360(10300)
IR νKBr nax cm-1
1780,1735,1710,1615,
1H―NMR δ ppm (CDCl3)
7.28(s,1H),7.24(s,1H),6.89(s,
1H),4.42(t,2H),3.96(s,3H),3.56
(t,2H),3.33(t,2H),2.6(m,4H),
2.50(s,6H),2.43(s,6H),1.9〜1.2(m,
14H),0.91(m,6H),0.58(t,3H)
Mass M+ m/z 825
次に、2〜5%(v/v)アセトン―トルエン
混液溶出分画より得た黄色結晶をイソプロピルエ
ーテル―アセトン混液より再結晶して、ロイコテ
トラアセチルテトラハイドロフレデリカマイシン
Aのモノブチル体〔()式中、m=0、n=4
(化合物4)〕の淡黄色結晶0.30g(収率39.0%)
を得た。
融点 218〜220℃
UV λEtOH nax nm(ε)
237(57700),284(67900),324(9800),338
(12200),358(10900)
IR νKBr nax cm-1
1780,1740,1710,1615 第3図
1H―NMR δ ppm (CDCl3)
8.94(s,1H),7.23(s,1H),7.05(s,
1H),6.88(s,1H),4.47(t,2H),3.95
(s,3H),3.31(t,2H),2.6(m,4H),
2.50(s,6H),2.43(s,6H),1.9〜1.2(m,
10H),1.9(m,6H)
第4図
Mass M+ m/z 769
As is clear from the results of the above stability test, the compound of the present invention has antitumor activity and also has higher stability than fredericamycin A. [Example] Next, the present invention will be described with reference to Reference Examples and Examples. Reference example Production of leucotetraacetyltetrahydrofredericamycin A (): Dissolve 0.50 g of fredericamycin A in 30 ml of tetrahydrofuran, and add 0.05 g of 10% palladium on carbon.
was added, and catalytic reduction was carried out under stirring at room temperature. After reacting for 10 hours, 10 ml of pyridine and 1 ml of acetic anhydride were added to the reaction solution in a nitrogen stream, and the mixture was further stirred at room temperature for 1 hour. This reaction solution was filtered, and the solution was cooled with ice.
It was added to hexane with stirring, and the resulting precipitate was collected. This precipitate was recrystallized from a chloroform-ethyl acetate mixture, resulting in 0.53 g of yellow crystals of leucotetraacetyltetrahydrofredericamycin A (yield: 80%). was gotten. Melting point 273℃ (decomposition) UV λ dioxane max nm (ε) 241 (51300), 287 (68400), 338 (17100), 352
(20000) IR ν KBr nax cm -1 1780, 1740, 1715, 1660, 1650, 1620 1 H-NMR δ ppm (DMSO d-6) 12.96 (s, 1H), 11.52 (s, 1H), 7.87 (s ,
1H), 6.90 (s, 1H), 6.35 (s, 1H), 3.96
(s, 3H), 3.16 (t, 2H), 2.5 (m, 4H),
2.44 (s, 12H), 1.8~1.1 (m, 6H), 0.80
(t, 3H) Mass M + m/z 713 Elemental analysis value (%) C 38 H 35 NO 13 (Molecular weight 713.69)
As C H N Experimental value 63.93 4.95 1.93 Theoretical value 63.95 4.94 1.96 Example 1 Leucotetraacetyltetrahalide fredericamycin A () 2.14 g (3 mmol) and silver oxide
3.48 g (15 mmol) and 200 ml of acetone were added, and 15 ml of methyl iodide was added dropwise over about 15 minutes while stirring under heating under reflux. After completion of the dropwise addition, the mixture was heated under the same conditions for 1 hour, and after cooling, inorganic substances were removed by filtration, and the liquid was dried under reduced pressure. The residue was purified by silica gel column chromatography, and the yellow crystals obtained from the elution fraction with a 5% (v/v) acetone-toluene mixture were recrystallized from an isopropyl ether-acetone mixture to obtain leucotetraacetyltetrahydrofredericamycin. Dimethyl form of A [(in the formula, m=
1.25 g (yield: 56.3%) of pale yellow crystals of compound 1, n=1 (compound 1) were obtained. Melting point 147-149℃ UV λ EtOH nax nm (ε) 241 (52400), 285 (68600), 323 (7900), 337
(9800), 360 (10000) IRν KBr nax cm -1 1785, 1745, 1715, 1620 Fig. 1 1 H-NMR δ ppm (CDCl 3 ) 7.26 (s, 1H), 7.21 (s, 1H), 6.88 ( s,
1H), 3.97 (s, 3H), 3.91 (s, 3H), 3.38
(s, 3H), 3.31 (t, 2H), 2.6 (m, 4H),
2.47 (s, 3H), 2.46 (s, 3H), 2.41 (s,
6H), 1.9-1.2 (m, 6H), 0.89 (t, 3H)
Figure 2 Mass M + m/z 741 Example 2 In the same manner as in Example 1 except that ethyl iodide was used in place of methyl iodide in Example 1, in the formula (), m = 2, n = 2 Compound (Compound 2)
I got it. Melting point 131-132℃ Pale yellow crystal UV λ EtOH nax nm (ε) 241 (52200), 285 (67400), 323 (7800), 337
(9800), 360 (9900) IR ν KBr nax cm -1 1780, 1740, 1710, 1620 1 H―NMR δ ppm (CDCl 3 ) 7.28 (s, 1H), 7.24 (s, 1H), 6.89 (s,
1H), 4.48 (q, 2H), 3.94 (s, 3H), 3.62
(q, 2H), 3.33 (t, 2H), 2.6 (m, 4H),
2.48 (s, 3H), 2.46 (s, 3H), 2.41 (s,
6H), 1.9-1.2 (m, 9H), 0.88 (t, 3H),
0.71 (t, 3H) Mass M + m/z 769 Examples 3, 4 Leukotetraacetyltetrahydrofredericamycin A () 0.71g (1mmol) with silver oxide
1.16 g (5 mmol) and 50 ml of anhydrous dioxane were added, and 5 ml of butyl iodide was added dropwise over about 10 minutes while stirring at 70-75°C. After the dropwise addition was completed, the mixture was heated under the same conditions for 30 minutes, cooled, and the inorganic substances were removed by filtration, and the liquid was dried under reduced pressure. The residue was separated and purified by silica gel chromatography. First 2% (v/v)
The yellow crystals obtained from the acetone-toluene mixture elution fraction were recrystallized from an isopropyl ether-acetone mixture to obtain the dibutyl compound of leucotetraacetyltetrahydrofredericamycin A [(in the formula),
0.11 g of pale yellow crystals of m=4, n=4 (compound 3)
(yield 13.3%). Melting point 104-105℃ UV λ EtOH nax nm (ε) 241 (53900), 286 (69200), 323 (8400), 337
(10300), 360 (10300) IR ν KBr nax cm -1 1780, 1735, 1710, 1615 , 1 H―NMR δ ppm (CDCl 3 ) 7.28 (s, 1H), 7.24 (s, 1H), 6.89 (s ,
1H), 4.42 (t, 2H), 3.96 (s, 3H), 3.56
(t, 2H), 3.33 (t, 2H), 2.6 (m, 4H),
2.50 (s, 6H), 2.43 (s, 6H), 1.9~1.2 (m,
14H), 0.91 (m, 6H), 0.58 (t, 3H) Mass M + m/z 825 Next, the yellow crystals obtained from the 2-5% (v/v) acetone-toluene mixture elution fraction were dissolved in isopropyl ether. - Recrystallized from an acetone mixture to obtain the monobutyl form of leucotetraacetyltetrahydrofredericamycin A [in the formula (), m=0, n=4
(Compound 4)] pale yellow crystals 0.30g (yield 39.0%)
I got it. Melting point 218-220℃ UV λ EtOH nax nm (ε) 237 (57700), 284 (67900), 324 (9800), 338
(12200), 358 (10900) IR ν KBr nax cm -1 1780, 1740, 1710, 1615 Figure 3 1 H-NMR δ ppm (CDCl 3 ) 8.94 (s, 1H), 7.23 (s, 1H), 7.05 (s,
1H), 6.88 (s, 1H), 4.47 (t, 2H), 3.95
(s, 3H), 3.31 (t, 2H), 2.6 (m, 4H),
2.50 (s, 6H), 2.43 (s, 6H), 1.9~1.2 (m,
10H), 1.9 (m, 6H) Fig. 4 Mass M + m/z 769
【図面の簡単な説明】[Brief explanation of the drawing]
第1図及び第2図は、各々化合物1のIR及び
1H―NMRスペクトルを示す図面である。第3図
及び第4図は、各々化合物4のIR及び1H―
NMRスペクトルを示す図面である。
Figures 1 and 2 show the IR and IR of compound 1, respectively.
1 is a drawing showing a 1 H-NMR spectrum. Figures 3 and 4 show the IR and 1 H- of compound 4, respectively.
It is a drawing showing an NMR spectrum.