JPH09110872A - Iodoporphyrin derivative - Google Patents

Iodoporphyrin derivative

Info

Publication number
JPH09110872A
JPH09110872A JP7299204A JP29920495A JPH09110872A JP H09110872 A JPH09110872 A JP H09110872A JP 7299204 A JP7299204 A JP 7299204A JP 29920495 A JP29920495 A JP 29920495A JP H09110872 A JPH09110872 A JP H09110872A
Authority
JP
Japan
Prior art keywords
compound
derivative
water
iodoporphyrin
ray
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7299204A
Other languages
Japanese (ja)
Inventor
Toshio Igarashi
淑郎 五十嵐
Takanori Kawakami
貴教 川上
Junji Morikawa
惇二 森川
Hiroshi Takano
弘 高野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eiken Chemical Co Ltd
Original Assignee
Eiken Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eiken Chemical Co Ltd filed Critical Eiken Chemical Co Ltd
Priority to JP7299204A priority Critical patent/JPH09110872A/en
Publication of JPH09110872A publication Critical patent/JPH09110872A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To obtain a new compound useful as a synthetic intermediate for a contrast medium for MRI and X ray. SOLUTION: The compound expressed by the formula (R is hydroxyl; n is an integer of 1-3) or its salt, for example 5, 10, 15, 20-tetraxis(3,5-diiodo-4- hydroxyphenyl) porphylin is provided. This compound is obtained by dropping the dissolved 3,5-diiodo-4-hydroxybenzaldehyde to propionic acid and then dropping pyrrole to precipitate the crystal followed by washing and filtration. The compound of the formula is easily synthesized and has 4-12 hydroxyls, as functional groups, per one mole of porphylin allowing this compound to change into a compound easily soluble in water in a simple way such as esterification. This compound has a porphylin ring shortening the relaxation time of NMR of water proton and simultaneously a X-ray absorber (iodine) in the molecule, this compound is useful as an intermediate of a compound having a function of a contrast medium for MRI together with a function of a contrast medium for X ray.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、MRI造影剤及び
X線造影剤を得るための中間体として使用することがで
きる新規なヨードポルフィリン誘導体又はその金属錯体
に関するものである。
TECHNICAL FIELD The present invention relates to a novel iodoporphyrin derivative or a metal complex thereof which can be used as an intermediate for obtaining an MRI contrast agent and an X-ray contrast agent.

【0002】[0002]

【従来の技術】ポルフィリン誘導体及びその金属錯体は
高感度なスペクトル特性(例えば、吸光,蛍光,リン
光)などの優れた機能を備え、又、ヘマトポルフィリン
をはじめとする生体由来のポルフィリン化合物はガン腫
瘍に選択的に集積することが知られていることから、近
年、ポルフィリン誘導体又はその金属錯体を医療分野に
おける種々の用途に用いるための試みがなされている。
例えば特開平2−160789号公報には、ポルフィリ
ン骨格の13−位及び17−位にプロピオン酸置換基又
はプロピオン酸誘導体置換基を有するポルフィリン金属
錯体、前記錯体を含有する製薬学的製剤(例えば、NM
R診断薬、レントゲン診断薬、超音波診断薬、光診断
薬)、診断及び治療におけるその使用(例えば、放射線
治療剤、光線治療剤)、前記錯体及び前記製剤の製造方
法が開示されている。
2. Description of the Related Art Porphyrin derivatives and metal complexes thereof have excellent functions such as highly sensitive spectral characteristics (eg, absorption, fluorescence, phosphorescence), and porphyrin compounds derived from living organisms such as hematoporphyrin are cancerous. Since it is known to selectively accumulate in tumors, attempts have recently been made to use the porphyrin derivative or its metal complex for various applications in the medical field.
For example, JP-A-2-160789 discloses a porphyrin metal complex having a propionic acid substituent or a propionic acid derivative substituent at the 13-position and 17-position of a porphyrin skeleton, a pharmaceutical preparation containing the complex (for example, NM
R diagnostic agents, X-ray diagnostic agents, ultrasonic diagnostic agents, optical diagnostic agents), their use in diagnosis and therapy (for example, radiotherapeutic agents, phototherapeutic agents), said complexes and methods for preparing said formulations are disclosed.

【0003】ポルフィリン誘導体の金属錯体は水プロト
ンのNMR緩和時間を短縮することから、前記金属錯体
をMRI造影剤として使用する試みもなされており、こ
の場合、ポルフィリン誘導体又はその金属錯体は水に対
して易溶性であることが好ましい。例えば特開平6−2
34661号公報には、スルホン酸置換基を導入するこ
とにより水溶性としたポルフィリン誘導体のマンガン錯
体を含むMRI造影剤が開示されており、又、特開平7
−82285号公報には、水溶性のポルフィリン・リン
酸誘導体及び該化合物の金属錯体を含むMRI造影剤が
開示されている。
Since a metal complex of a porphyrin derivative shortens the NMR relaxation time of water protons, attempts have been made to use the metal complex as an MRI contrast agent. In this case, the porphyrin derivative or its metal complex is used in water. It is preferably easily soluble. For example, JP-A-6-2
Japanese Patent No. 34661 discloses an MRI contrast agent containing a manganese complex of a porphyrin derivative which is made water-soluble by introducing a sulfonic acid substituent.
JP-A-82285 discloses an MRI contrast agent containing a water-soluble porphyrin-phosphate derivative and a metal complex of the compound.

【0004】ところで、MRI造影剤を使用するNMR
診断(例えば、NMR−CT)と並んで、X線造影剤を
使用するX線診断(例えば、X線−CT)も現在の有力
な診断手段である。X線造影剤として種々の化合物の使
用が提案されており、例えば特開平6−321867号
公報には、有効なX線吸収体であるヨウ素原子を含むヨ
ード安息香酸誘導体からなるX線造影剤が開示されてい
る。
By the way, NMR using an MRI contrast agent
Along with diagnosis (for example, NMR-CT), X-ray diagnosis (for example, X-ray-CT) using an X-ray contrast agent is also a powerful diagnostic tool at present. The use of various compounds as X-ray contrast agents has been proposed. For example, JP-A-6-321867 discloses an X-ray contrast agent composed of an iodobenzoic acid derivative containing an iodine atom which is an effective X-ray absorber. It is disclosed.

【0005】[0005]

【発明が解決しようとする課題】NMR診断(例えば、
NMR−CT)及びX線診断(例えば、X線−CT)は
医学的診断において併用されることも多いが、前述の如
く、MRI造影剤として要求される性質とX線造影剤と
して要求される性質とは全く異なるため、従来、MRI
造影剤及びX線造影剤としては各々別の薬剤(化合物又
は組成物)が使用されてきた。しかしながら、MRI造
影剤及びX線造影剤として各々別の薬剤を使用する場合
には、前記薬剤を被検体(例えば患者)に別々に投与し
なければならず、投与が繁雑となり、又、そのため、N
MR診断及びX線診断を連続して行うことも困難であっ
た。
Problems to be Solved by the Invention
Although NMR-CT) and X-ray diagnosis (for example, X-ray-CT) are often used together in medical diagnosis, as described above, the properties required as an MRI contrast agent and the X-ray contrast agent are required. Conventionally, MRI because it is completely different from the property
Different agents (compounds or compositions) have been used as contrast agents and X-ray contrast agents, respectively. However, when different agents are used as the MRI contrast agent and the X-ray contrast agent, the agents have to be separately administered to a subject (for example, a patient), the administration becomes complicated, and therefore, N
It was also difficult to continuously perform MR diagnosis and X-ray diagnosis.

【0006】本発明は前記従来技術における問題点を解
決するためのものであり、その目的とするところは、一
つの化合物でMRI造影剤及びX線造影剤としての機能
を併有する化合物を得るための中間体として使用するこ
とができる新規なヨードポルフィリン誘導体を提供する
ことにある。
The present invention is intended to solve the above-mentioned problems in the prior art, and an object of the present invention is to obtain a compound having both functions as an MRI contrast agent and an X-ray contrast agent with one compound. Another object of the present invention is to provide a novel iodoporphyrin derivative that can be used as an intermediate of

【0007】[0007]

【課題を解決するための手段】すなわち本発明のヨード
ポルフィリン誘導体又はその金属錯体は、次式I:
That is, the iodoporphyrin derivative or the metal complex thereof of the present invention has the following formula I:

【化4】 〔式中、Rはヒドロキシル基を表わし、nは1ないし3
の整数を表わす〕で表わされることを特徴とする。
Embedded image [In the formula, R represents a hydroxyl group, and n is 1 to 3
Represents an integer of]].

【0008】[0008]

【発明の実施の形態】ヒドロキシル基Rは、式Iで表わ
される化合物のベンゼン環に1個ないし3個導入されて
いてよい。式Iで表わされる化合物は、ポルフィリン誘
導体を得るための慣用の方法又はこれに準じた方法を用
いて容易に得ることができる。
BEST MODE FOR CARRYING OUT THE INVENTION One to three hydroxyl groups R may be introduced into the benzene ring of the compound of formula I. The compound represented by the formula I can be easily obtained by using a conventional method for obtaining a porphyrin derivative or a method analogous thereto.

【0009】前記式Iで表わされる化合物のうち、例え
ば、次式II:
Among the compounds represented by the above formula I, for example, the following formula II:

【化5】 で表わされる化合物〔5,10,15,20−テトラキ
ス(3,5−ジヨード−4−ヒドロキシフェニル)ポル
フィン;以下、p−THI2 PPと略記する〕、及び次
式III :
Embedded image A compound represented by [5,10,15,20-tetrakis (3,5-diiodo-4-hydroxyphenyl) porphine; hereinafter abbreviated as p-THI 2 PP], and the following formula III:

【化6】 で表わされる化合物〔5,10,15,20−テトラキ
ス(3,5−ジヨード−2−ヒドロキシフェニル)ポル
フィン;以下、o−THI2 PPと略記する〕は共に、
出発原料を容易に得ることができるので好ましい。
Embedded image The compound represented by [5,10,15,20-tetrakis (3,5-diiodo-2-hydroxyphenyl) porphine; hereinafter abbreviated as o-THI 2 PP] is
It is preferable because the starting material can be easily obtained.

【0010】式Iで表わされるヨードポルフィリン誘導
体を所望の金属塩、例えば、鉄,マンガン,チタン,
銅,バナジウム,ガドリニウムなどの金属(常磁性金
属)の塩と反応させると、式Iで表わされるヨードポル
フィリン誘導体の相当する金属錯体を簡単に得ることが
できる。前記金属塩は、得られる金属錯体の用途に応じ
て適宜選択する。
The iodoporphyrin derivative of the formula I can be converted into the desired metal salts such as iron, manganese, titanium,
Reaction with a salt of a metal (paramagnetic metal) such as copper, vanadium or gadolinium allows the corresponding metal complex of the iodoporphyrin derivative of formula I to be readily obtained. The metal salt is appropriately selected according to the intended use of the obtained metal complex.

【0011】本発明の新規なヨードポルフィリン誘導体
は、合成が容易であると共に官能性基であるヒドロキシ
ル基をポルフィリン1分子当たり4〜12個含んでいる
ため、それ自体は非水溶性であるが、前記ヒドロキシル
基に親水性基(例えば、スルホン酸基やリン酸基)を更
に結合させることにより、容易に水溶性のヨードポルフ
ィリン誘導体に変換可能である。
Since the novel iodoporphyrin derivative of the present invention is easy to synthesize and contains 4 to 12 hydroxyl groups as functional groups per molecule of porphyrin, it is water-insoluble per se. By further bonding a hydrophilic group (for example, a sulfonic acid group or a phosphoric acid group) to the hydroxyl group, it can be easily converted into a water-soluble iodoporphyrin derivative.

【0012】[0012]

【実施例】以下の実施例により、本発明を更に詳細に説
明する。 1:ヨードポルフィリン誘導体又はその金属錯体の合成 全てアドラーの方法〔A.D.Adler,et.al., J.Org.Chem.,
32, 476(1967)〕に準拠して合成した。なお、他の
試薬は表記されていない限り市販品特級を用い、水は再
蒸留水を使用した。
The present invention will be described in more detail with reference to the following examples. 1: Synthesis of iodoporphyrin derivative or its metal complex All Adler methods [ADAdler, et.al., J.Org.Chem.,
32 , 476 (1967)]. Unless otherwise indicated, special grade commercial products were used, and water was double-distilled water.

【0013】1−1:p−THI2 PPの合成 <合成> 全還流冷却器を付けた500mlのセパラブ
ルフラスコにプロピオン酸約400mlを入れ、マント
ルヒーターで加熱した。沸騰後、プロピオン酸約50m
lに溶かした3,5−ジヨード−4−ヒドロキシベンズ
アルデヒド〔ランカスター(Lancaster)社製〕15gを
滴下し、次いで等モル量のピロール(約2.8ml)を
滴下し、40分還流した。放冷後、反応溶液を冷蔵庫で
一晩熟成し、紫色の結晶が析出したら、これをG4ガラ
スフィルターで濾過した。 <精製> 結晶を先ずプロピオン酸で、次いで水:メタ
ノール=1:1の混合溶媒で洗浄・濾過した後、冷アセ
トンで数回洗浄・濾過を繰り返した。収量5g、収率2
8%。
1-1: Synthesis of p-THI 2 PP <Synthesis> About 400 ml of propionic acid was placed in a 500 ml separable flask equipped with a total reflux condenser and heated with a mantle heater. About 50m of propionic acid after boiling
15 g of 3,5-diiodo-4-hydroxybenzaldehyde (manufactured by Lancaster) dissolved in 1 was added dropwise, and then equimolar amount of pyrrole (about 2.8 ml) was added dropwise and refluxed for 40 minutes. After allowing to cool, the reaction solution was aged overnight in a refrigerator, and when purple crystals were deposited, this was filtered through a G4 glass filter. <Purification> The crystals were first washed and filtered with propionic acid and then with a mixed solvent of water: methanol = 1: 1, and then washed and filtered several times with cold acetone. Yield 5g, Yield 2
8%.

【0014】1−2:p−Mn(THI2 PP)の合成 <合成> 全還流冷却器を付けた100mlの平底フラ
スコに水:DMSO=1:2の混合溶媒80mlを入
れ、スターラで攪拌しながら順にp−THI2 pp0.
02g、酢酸マンガン0.02g、酢酸ナトリウム0.
05gを加えて溶かした。水酸化ナトリウム水溶液を用
いてpHを9〜10程度に調整した後、ホットプレート
スターラで攪拌しながら100〜120℃で約6時間還
流した。TLCにてスポットが1点となったところを反
応の終点とした。なお、更に加熱し続けるとポルフィン
環が分解するので注意を要する。 <精製> 蒸留水を加えて2倍程度に希釈した後、分液
ロートに移し、酢酸エチルを50ml加えて振震し、抽
出した。次いで有機相を蒸留水で数回洗浄した後、ロー
タリーエバポレーターで蒸発乾固した。収量1.85×
10-2g、収率90%。
1-2: Synthesis of p-Mn (THI 2 PP) <Synthesis> 80 ml of a mixed solvent of water: DMSO = 1: 2 was placed in a 100 ml flat-bottomed flask equipped with a total reflux condenser and stirred with a stirrer. However, p-THI 2 pp0.
02 g, manganese acetate 0.02 g, sodium acetate 0.
05 g was added and dissolved. After adjusting the pH to about 9 to 10 with an aqueous sodium hydroxide solution, the mixture was refluxed at 100 to 120 ° C. for about 6 hours while stirring with a hot plate stirrer. The point at which one spot was obtained by TLC was taken as the end point of the reaction. Note that the porphine ring will decompose if heating is continued, so caution is required. <Purification> Distilled water was added to dilute the mixture to about twice, and the mixture was transferred to a separating funnel, 50 ml of ethyl acetate was added thereto, and the mixture was shaken and extracted. The organic phase was then washed several times with distilled water and then evaporated to dryness on a rotary evaporator. Yield 1.85x
10 -2 g, yield 90%.

【0015】1−3:o−THI2 PPの合成 <合成> 全還流冷却器を付けた500mlのセパラブ
ルフラスコにプロピオン酸約400mlを入れ、マント
ルヒーターで加熱した。沸騰後、プロピオン酸約50m
lに溶かした3,5−ジヨード−サリチルアルデヒド
〔アルドリッチ(Aldrich) 社製〕7.5gを滴下し、次
いで等モル量のピロール(約1.4ml)を滴下し、4
0分還流した。放冷後、反応溶液を冷蔵庫で一晩熟成
し、沈澱が生じたら、これをG4ガラスフィルターで濾
過した。 <精製> 沈澱を先ずプロピオン酸で、次いで水:メタ
ノール=1:1の混合溶媒で洗浄・濾過した後、ソック
スレー脂肪抽出器でエタノール溶媒を用いて24時間抽
出した。抽出液をロータリーエバポレーターで蒸発乾固
した。収量5.1g、収率5%。
1-3: Synthesis of o-THI 2 PP <Synthesis> About 400 ml of propionic acid was placed in a 500 ml separable flask equipped with a total reflux condenser and heated with a mantle heater. About 50m of propionic acid after boiling
7.5 g of 3,5-diiodo-salicylaldehyde (Aldrich) dissolved in 1 was added dropwise, followed by an equimolar amount of pyrrole (about 1.4 ml),
Refluxed for 0 minutes. After allowing to cool, the reaction solution was aged in a refrigerator overnight, and when a precipitate was formed, this was filtered through a G4 glass filter. <Purification> The precipitate was first washed with propionic acid and then with a mixed solvent of water: methanol = 1: 1, filtered, and then extracted with a Soxhlet fat extractor using an ethanol solvent for 24 hours. The extract was evaporated to dryness on a rotary evaporator. Yield 5.1 g, 5% yield.

【0016】1−4:o−Mn(THI2 PP)の合成 1−2のp−Mn(THI2 PP)と同様の手順にて合
成及び精製した。収率90%。
1-4: Synthesis of o-Mn (THI 2 PP) Synthesis and purification were carried out in the same procedure as p-Mn (THI 2 PP) of 1-2. 90% yield.

【0017】2:ヨードポルフィリン誘導体及びその金
属錯体の元素分析及びスペクトル分析 2−1:ヨードポルフィリン誘導体の元素分析 p−THI2 PP及びo−THI2 PP(共に、分子量
1694.0)の元素分析結果を下記表1に示す。
2: Elemental analysis and spectral analysis of iodoporphyrin derivative and its metal complex 2-1: Elemental analysis of iodoporphyrin derivative p-THI 2 PP and o-THI 2 PP (both molecular weight 1694.0) The results are shown in Table 1 below.

【表1】 [Table 1]

【0018】2−2:ヨードポルフィリン誘導体及びそ
の金属錯体(マンガン錯体)の紫外可視吸収スペクトル 水/DMSO混合溶媒(水:DMSO=1:2)中での
紫外可視吸収スペクトルのピーク波長を下記表2に示
す。
2-2: Ultraviolet-visible absorption spectrum of iodoporphyrin derivative and its metal complex (manganese complex) The peak wavelength of the ultraviolet-visible absorption spectrum in a water / DMSO mixed solvent (water: DMSO = 1: 2) is shown in the following table. 2 shows.

【表2】 [Table 2]

【0019】2−3:ヨードポルフィリン誘導体の赤外
線吸収スペクトル p−THI2 PP及びo−THI2 PPの赤外線吸収ス
ペクトルを測定し、主な吸収帯の帰属を行った。 試料調製 各ヨードポルフィリン誘導体1mgを300mgのKB
rと均一に混合し、錠剤に成形した。 測定条件 Bruker社製の赤外線分光光度計(IFS−120HR)
を使用して、下記条件で測定した。 ビームスプリッター :Ge/KBr 光源 :超高圧水銀灯 グローバー 検出器 :MCT 分解能 :2cm-1 積算回数 :512回 ゼロフィリング :2倍 アポタイゼイション関数:4P(台形) 位相補正 :Mertz 法 Optical Filter :なし アパーチャー :10 ミラー速度 :8 参照試料 :KBr 結果 p−THI2 PPの赤外線吸収スペクトルを図1に示
し、o−THI2 PPの赤外線吸収スペクトルを図2に
示す。 吸収帯の帰属 各吸収帯を下記表3の如く帰属した。
2-3: Infrared absorption spectrum of iodoporphyrin derivative The infrared absorption spectra of p-THI 2 PP and o-THI 2 PP were measured and the main absorption bands were assigned. Sample preparation 1 mg of each iodoporphyrin derivative was added to 300 mg of KB.
The mixture was uniformly mixed with r and molded into tablets. Measurement conditions Bruker infrared spectrophotometer (IFS-120HR)
Was measured under the following conditions. Beam splitter: Ge / KBr Light source: Ultra-high pressure mercury lamp Globar Detector: MCT Resolution: 2 cm -1 Integration number: 512 times Zero filling: 2 times Apotization function: 4P (trapezoid) Phase correction: Mertz method Optical Filter: None Aperture: 10 Mirror speed: 8 Reference sample: KBr result The infrared absorption spectrum of p-THI 2 PP is shown in FIG. 1, and the infrared absorption spectrum of o-THI 2 PP is shown in FIG. 2. Attribution of Absorption Bands Each absorption band was assigned as shown in Table 3 below.

【表3】 ν :伸縮振動 δ :面内変角振動 Ph :フェニル骨格 Pyr :ピレン骨格 ring:環全体 Iの関与する振動は600cm-1以下では観測されてい
ない。 参考文献 吸収帯の帰属に際しては、下記文献を参照した。 −1:νNHについて ハンス−ハインリッヒ リムバッハ(Hans-Heinrich Lim
bach) ,ユルゲン ヘニッヒ(Jurgen Hennig) 及びヨセ
フ シュツルツ(Josef Stulz) ,J.Chem.Phy.5432,78(1
983)。 −2:その他の振動について 1) キアオ−ユアン(Xiao-Yuan) ,ロマン エス.ツ
ァーヌスツェウィック(Roman S. Czernuszewicz),ジェ
ームス アール.キンケイド(James R. Kincaid),ワイ
オリヴァー スー(Y. Oliver Su)及びトーマス ジ
ー.スピロ(ThomasG. Spiro) ,J.Phys.Chem.,31,94(19
90)。 2) エル.エル.グラドコヴ(L. L. Gladkov) ,ケ
イ.エヌ.オルビョヴ(K.N. Solvyov) ,Spectrosc. Le
tt.,905,19(1986) 。
[Table 3] ν: Stretching vibration δ: In-plane bending vibration Ph: Phenyl skeleton Pyr: Pyrene skeleton ring: Whole ring Vibrations involving I have not been observed below 600 cm -1 . References The following references were referred to when assigning the absorption band. -1: About νNH Hans-Heinrich Lim
bach), Jurgen Hennig and Josef Stulz, J. Chem. Phy. 5432,78 (1
983). -2: Other vibrations 1) Xiao-Yuan, Romanes. Roman S. Czernuszewicz, James Earl. Kincaid (James R. Kincaid), Y. Oliver Su and Thomas G. Spiro (Thomas G. Spiro), J. Phys. Chem., 31,94 (19
90). 2) Elle. El. LL Gladkov, Kei. N. KN Solvyov, Spectrosc. Le
tt., 905, 19 (1986).

【0020】3.溶解特性の検討 合成した本発明のヨードポルフィリン誘導体(遊離型)
について、水を含む各種の溶媒に対する溶解特性を検討
した。結果を下記表4に示す。
3. Examination of dissolution characteristics Synthesized iodoporphyrin derivative of the present invention (free form)
Was examined for dissolution characteristics in various solvents including water. The results are shown in Table 4 below.

【表4】 [Table 4]

【0021】表4の結果より、本発明のヨードポルフィ
リン誘導体(遊離型)はそれ自体では水に不溶なので、
水溶性とするには、適当な方法(例えば、硫酸やリン酸
などを用いてヒドロキシル基を親水性エステル基に変え
る)を用いる必要がある。
From the results shown in Table 4, since the iodoporphyrin derivative of the present invention (free form) is insoluble in water by itself,
In order to make it water-soluble, it is necessary to use an appropriate method (for example, converting a hydroxyl group into a hydrophilic ester group by using sulfuric acid, phosphoric acid or the like).

【0022】4:MRI造影剤の中間体としての予備検
討 本発明のヨードポルフィリン誘導体が、MRI造影剤を
得るための有用な中間体となり得るかどうかについての
予備検討を行った。
4: Preliminary Examination as Intermediate of MRI Contrast Agent Preliminary examination was carried out as to whether the iodoporphyrin derivative of the present invention could be a useful intermediate for obtaining an MRI contrast agent.

【0023】4−1:実験手順 4−1−1:被検物質 (a)p−THI2 PP(Mn錯体) (b)o−THI2 PP(Mn錯体) (c)MnCl2 ・4H2 O(対照) 4−1−2:試薬・試液 DMSO(和光・特級) 0.25mM MnCl2 溶液 0.5mM MnCl2 溶液 4−1−3:使用機器 NMRスペクトロメーター(日本ブルカー社製,Minisp
ec PC120,0.47T ) ブロックヒーター(井内社製,DATAPLATE MODEL 350 )
4-1: Experimental procedure 4-1-1: Test substance (a) p-THI 2 PP (Mn complex) (b) o-THI 2 PP (Mn complex) (c) MnCl 2 .4H 2 O (control) 4-1-2: Reagent / sample solution DMSO (Wako / special grade) 0.25 mM MnCl 2 solution 0.5 mM MnCl 2 solution 4-1-3: Equipment used NMR spectrometer (Minisp, manufactured by Bruker Japan, Inc., Minisp
ec PC120, 0.47T) Block heater (Inaisha, DATAPLATE MODEL 350)

【0024】4−1−4:試験方法 <試料調製> p−THI2 PP(Mn錯体) 本品11.45mgをDMSO1mlに溶解し、水4m
lを加えてよく混和し、試料溶液−1とした。試料溶
液−1を水で2,4倍希釈して試料溶液−2,−
3を調製した。 o−THI2 PP(Mn錯体) 本品11.39mgをDMSO5mlに溶解し、試料溶
液−1とした。試料溶液−1を水で2,4倍希釈し
て試料溶液−2,−3を調製した。なお、本品はD
MSOで溶解後、水を加えると沈澱が析出するので、前
記パラ体とは調製条件を変えた。 MnCl2 ・4H2 O 本品を水で溶解し、0.25mM及び0.5mM溶液を
調製し、試料溶液−1,−2とした。
4-1-4: Test method <Sample preparation> p-THI 2 PP (Mn complex) 11.45 mg of this product was dissolved in 1 ml of DMSO and 4 m of water was added.
1 was added and mixed well to prepare a sample solution-1. Sample solution-1 is diluted with water 2 to 4 times to obtain sample solution-2,-
3 was prepared. o-THI 2 PP (Mn complex) 11.39 mg of this product was dissolved in 5 ml of DMSO to prepare a sample solution-1. Sample solution-1 was diluted with water 2 to 4 times to prepare sample solutions-2 and -3. In addition, this product is D
After water was added after dissolution with MSO, a precipitate was precipitated, so the preparation conditions were changed from those of the para-form. MnCl 2 .4H 2 O This product was dissolved in water to prepare 0.25 mM and 0.5 mM solutions, which were used as sample solutions -1 and -2.

【0025】<緩和度の測定>緩和度(R)は、試料濃
度に対して緩和速度(1/T)をプロットして得られる
直線の傾きとして表わされる。そこでNMRスペクトロ
メーターにより、各試料溶液の緩和時間(T1 ,T2
を測定し、試料濃度及び緩和速度(R1 ,R2)を算出
した。なお、直線の式は最小二乗法により求めた。 計算式:
<Measurement of Relaxation> The relaxation (R) is expressed as the slope of a straight line obtained by plotting the relaxation rate (1 / T) against the sample concentration. Therefore, the relaxation time (T 1 , T 2 ) of each sample solution was measured by an NMR spectrometer.
Was measured, and the sample concentration and relaxation rate (R 1 , R 2 ) were calculated. The equation of the straight line was obtained by the method of least squares. a formula:

【数1】 ここで、n:プロット数 x:試料濃度(mM) y:試料の緩和速度1/T(sec -1) 測定 :各試料溶液を予めブロックヒーターで40℃に
温め、NMRスペクトロメーターで緩和時間(T1 ,T
2 )を測定した。 測定法:T1 …インバージョン リカバリー(Inversion
Recovery)法(ROM:EDM510A) T2 …カー−パーセル−マイブーム−ジル(Carr-Purcel
l-Meiboom-Gill) 法(ROM:EDM610A)
(Equation 1) Here, n: number of plots x: sample concentration (mM) y: relaxation rate of sample 1 / T (sec -1 ) measurement: each sample solution was preheated to 40 ° C. with a block heater, and relaxation time was measured with an NMR spectrometer ( T 1 , T
2 ) was measured. Measurement method: T 1 ... Inversion recovery (Inversion
Recovery) method (ROM: EDM510A) T 2 ... Car-Purcell-My Boom-Jill (Carr-Purcel
l-Meiboom-Gill) method (ROM: EDM610A)

【0026】4−2:結果及び考察 各試料溶液の緩和時間の測定結果を表5に、又、各被検
物質の緩和度の計算結果を表6に示す。
4-2: Results and Discussion Table 5 shows the measurement results of relaxation time of each sample solution, and Table 6 shows the calculation results of relaxation degree of each test substance.

【表5】 * :測定不能[Table 5] * : Not measurable

【表6】 * :測定不能[Table 6] * : Not measurable

【0027】緩和度の測定では、溶媒として水を用いる
ことが理想的であるが、THI2 PP(Mn錯体)は水
に不溶で、均一に分散しないことから、p−THI2
P(Mn錯体)についてはDMSOに溶解後、水で希釈
して試料溶液を調製し、測定した。一方、o−THI2
PP(Mn錯体)はDMSOに溶解後、水で希釈すると
沈澱し、水プロトンに対する測定は不可能であった。参
考としてDMSO100%溶液とし、緩和度測定を試み
たが、T2 値については測定不能で緩和度R2を求める
ことができなかった。
In the measurement of the degree of relaxation, it is ideal to use water as a solvent, but since THI 2 PP (Mn complex) is insoluble in water and does not disperse uniformly, p-THI 2 P is used.
P (Mn complex) was dissolved in DMSO, diluted with water to prepare a sample solution, and measured. On the other hand, o-THI 2
PP (Mn complex) was dissolved in DMSO and then diluted with water to cause precipitation, and measurement with respect to water protons was impossible. As a reference, a 100% solution of DMSO was used and an attempt was made to measure the degree of relaxation, but the T 2 value could not be measured and the degree of relaxation R 2 could not be determined.

【0028】p−THI2 PP(Mn錯体)の緩和度を
測定した結果、R1 ,R2 共に比較的高い緩和度を有し
ていた。溶媒組成が若干異なるため単純には比較できな
いが、MnCl2 との比較から、Mnがポルフィリン骨
格に入ることにより、T2 短縮効果が1/3に減弱して
いることが判る。しかしながら、現在MRI造影剤とし
て市販されているGd−DTPAと比較しても同等以上
の高い緩和度を有していた。これらのことから、p−T
HI2 PP(Mn錯体)は磁性的にMRI造影剤の中間
体となり得ることが判った。
As a result of measuring the relaxivity of p-THI 2 PP (Mn complex), both R 1 and R 2 had a relatively high relaxivity. Although it is not possible to make a simple comparison because the solvent composition is slightly different, it can be seen from the comparison with MnCl 2 that the T 2 shortening effect is reduced to 1/3 due to Mn entering the porphyrin skeleton. However, even when compared with Gd-DTPA which is currently marketed as an MRI contrast agent, it had a high degree of relaxation equal to or higher than that. From these things, p-T
It has been found that HI 2 PP (Mn complex) can be magnetically an intermediate for MRI contrast agents.

【0029】5:X線造影剤の中間体としての予備検討 本発明のヨードポルフィリン誘導体が、X線造影剤を得
るための有用な中間体となり得るかどうかについての予
備検討を行った。 使用機種:X線CT 横河ProSeed (J) 撮像条件:120KV,160mA,3.0秒,演算回
数25回,5mmスライス 測定結果を下記表7に示す。又、バックグランドを下記
表8に示す。
5: Preliminary Examination as Intermediate of X-ray Contrast Agent Preliminary examination was carried out as to whether the iodoporphyrin derivative of the present invention could be a useful intermediate for obtaining an X-ray contrast agent. Model used: X-ray CT Yokogawa ProSeed (J) Imaging conditions: 120 KV, 160 mA, 3.0 seconds, number of operations 25 times, 5 mm slice The measurement results are shown in Table 7 below. The background is shown in Table 8 below.

【表7】 [Table 7]

【表8】 [Table 8]

【0030】表7において、本発明のヨードポルフィリ
ン誘導体(No1,2)と従来のX線造影剤(No3)とを
比較すると、本発明のヨードポルフィリン誘導体(No
1,2)は従来のX線造影剤(No3)よりも大きなCT
値を有しており、本発明のヨードポルフィリン誘導体は
X線造影剤を得るための有用な中間体となり得ることが
判る。
In Table 7, comparing the iodoporphyrin derivative of the present invention (No. 1 and 2) with the conventional X-ray contrast agent (No 3), the iodoporphyrin derivative of the present invention (No.
1 and 2) are larger CT than the conventional X-ray contrast agent (No3)
It has a value, and it is understood that the iodoporphyrin derivative of the present invention can be a useful intermediate for obtaining an X-ray contrast agent.

【0031】[0031]

【発明の効果】上述の如く、本発明の新規なヨードポル
フィリン誘導体又はその金属錯体は、合成が容易である
と共に官能性基であるヒドロキシル基をポルフィリン1
分子当たり4〜12個含んでいるので、エステル化など
の簡単な方法で容易に水に易溶性(水溶性)のものに変
えることが可能であり、又、一分子中に水プロトンのN
MR緩和時間を短縮する構造(ポルフィン環)と有効な
X線吸収体(ヨウ素原子)とを併有しているため、一つ
の化合物でMRI造影剤及びX線造影剤としての機能を
併有する化合物を得るための中間体として極めて有用で
ある。更に、本発明の前記誘導体は、生体組織に対する
適合性及び安全性が優れているため、取り扱いに便利で
あり適用範囲が広い。
INDUSTRIAL APPLICABILITY As described above, the novel iodoporphyrin derivative or the metal complex thereof of the present invention is easy to synthesize and has a hydroxyl group which is a functional group as porphyrin 1.
Since it contains 4 to 12 molecules per molecule, it can be easily changed to a water-soluble one (water-soluble) by a simple method such as esterification, and N of water protons can be contained in one molecule.
A compound that has both a structure (porphine ring) that shortens the MR relaxation time and an effective X-ray absorber (iodine atom), and thus has the function of both an MRI contrast agent and an X-ray contrast agent with one compound. It is extremely useful as an intermediate for obtaining Furthermore, since the derivative of the present invention has excellent compatibility with living tissues and safety, it is convenient to handle and has a wide range of applications.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明のヨードポルフィリン誘導体のうちの
5,10,15,20−テトラキス(3,5−ジヨード
−4−ヒドロキシフェニル)ポルフィン(p−THI2
PP)の赤外線吸収スペクトルである。
FIG. 1 shows 5,10,15,20-tetrakis (3,5-diiodo-4-hydroxyphenyl) porphine (p-THI 2 ) among iodoporphyrin derivatives of the present invention.
It is an infrared absorption spectrum of PP).

【図2】本発明のヨードポルフィリン誘導体のうちの
5,10,15,20−テトラキス(3,5−ジヨード
−2−ヒドロキシフェニル)ポルフィン(o−THI2
PP)の赤外線吸収スペクトルである。
FIG. 2 shows 5,10,15,20-tetrakis (3,5-diiodo-2-hydroxyphenyl) porphine (o-THI 2 ) among the iodoporphyrin derivatives of the present invention.
It is an infrared absorption spectrum of PP).

───────────────────────────────────────────────────── フロントページの続き (72)発明者 高野 弘 東京都北区王子5−26−20 栄研化学株式 会社王子事業所内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroshi Takano 5-26-20 Oji, Kita-ku, Tokyo Eiken Chemical Co., Ltd. Oji Office

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 次式I: 【化1】 〔式中、Rはヒドロキシル基を表わし、nは1ないし3
の整数を表わす〕で表わされることを特徴とするヨード
ポルフィリン誘導体又はその金属錯体。
1. The following formula I: [In the formula, R represents a hydroxyl group, and n is 1 to 3
Represents an integer] of the iodoporphyrin derivative or a metal complex thereof.
【請求項2】 式Iで表わされる化合物が次式II: 【化2】 で表わされる化合物であることを特徴とする請求項1記
載のヨードポルフィリン誘導体又はその金属錯体。
2. A compound of formula I is represented by the following formula II: The iodoporphyrin derivative or the metal complex thereof according to claim 1, which is a compound represented by the formula (1).
【請求項3】 式Iで表わされる化合物が次式III : 【化3】 で表わされる化合物であることを特徴とする請求項1記
載のヨードポルフィリン誘導体又はその金属錯体。
3. A compound of formula I is represented by the following formula III: The iodoporphyrin derivative or the metal complex thereof according to claim 1, which is a compound represented by the formula (1).
JP7299204A 1995-10-23 1995-10-23 Iodoporphyrin derivative Pending JPH09110872A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7299204A JPH09110872A (en) 1995-10-23 1995-10-23 Iodoporphyrin derivative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7299204A JPH09110872A (en) 1995-10-23 1995-10-23 Iodoporphyrin derivative

Publications (1)

Publication Number Publication Date
JPH09110872A true JPH09110872A (en) 1997-04-28

Family

ID=17869500

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7299204A Pending JPH09110872A (en) 1995-10-23 1995-10-23 Iodoporphyrin derivative

Country Status (1)

Country Link
JP (1) JPH09110872A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006515836A (en) * 2002-11-17 2006-06-08 イエダ リサーチ アンド デベロップメント カンパニー リミテッド Water-soluble anionic bacteriochlorophyll derivatives and their use

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006515836A (en) * 2002-11-17 2006-06-08 イエダ リサーチ アンド デベロップメント カンパニー リミテッド Water-soluble anionic bacteriochlorophyll derivatives and their use
US7947672B2 (en) 2002-11-17 2011-05-24 Yeda Research And Development Co. Ltd. Water-soluble anionic bacteriochlorophyll derivatives and their uses
JP2011162551A (en) * 2002-11-17 2011-08-25 Yeda Research & Development Co Ltd Water-soluble anionic bacteriochlorophyll derivative and use thereof
JP4922559B2 (en) * 2002-11-17 2012-04-25 イエダ リサーチ アンド デベロップメント カンパニー リミテッド Water-soluble anionic bacteriochlorophyll derivatives and their use
US8461142B2 (en) 2002-11-17 2013-06-11 Yeda Research And Development Co. Ltd. Water-soluble anionic bacteriochlorophyll derivatives and their uses

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