DE1172271B - Process for the preparation of xanthone-3-oxyacetic acid alkyl esters - Google Patents

Process for the preparation of xanthone-3-oxyacetic acid alkyl esters

Info

Publication number
DE1172271B
DE1172271B DEC20599A DEC0020599A DE1172271B DE 1172271 B DE1172271 B DE 1172271B DE C20599 A DEC20599 A DE C20599A DE C0020599 A DEC0020599 A DE C0020599A DE 1172271 B DE1172271 B DE 1172271B
Authority
DE
Germany
Prior art keywords
xanthone
oxyacetic acid
preparation
alkyl esters
acid alkyl
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
DEC20599A
Other languages
German (de)
Inventor
Dr Heinz Guenter Greve
Dr Med Rolf-Eberhard Nitz
Dr Heinrich Ritter
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.)
Cassella Farbwerke Mainkur AG
Original Assignee
Cassella Farbwerke Mainkur AG
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 Cassella Farbwerke Mainkur AG filed Critical Cassella Farbwerke Mainkur AG
Priority to DEC20599A priority Critical patent/DE1172271B/en
Priority to GB4413960A priority patent/GB923132A/en
Priority to CH51761A priority patent/CH392552A/en
Publication of DE1172271B publication Critical patent/DE1172271B/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D311/00Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/78Ring systems having three or more relevant rings
    • C07D311/80Dibenzopyrans; Hydrogenated dibenzopyrans
    • C07D311/82Xanthenes
    • C07D311/84Xanthenes with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 9
    • C07D311/86Oxygen atoms, e.g. xanthones

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

Verb wahren Herstellung von Xanthon-3-oxyessigsäurealkylestern Die Erfindung betrifft ein Verfahren zur Herstellung von Xanthon-3-oxyessigsäurealkylestern der allgemeinen Formel in der R einen Alkylrest bedeutet.Verb true Production of xanthone-3-oxyacetic acid alkyl esters The invention relates to a process for the production of xanthone-3-oxyacetic acid alkyl esters of the general formula in which R is an alkyl radical.

Diese neuen Verbindungen besitzen eine starke gefäßerweiternde Wirkung, insbesondere auf die Coronargefäße. Wie in Vergleichsversuchen festgestellt wurde, sind sie in dieser Hinsicht dem Papaverin und dem Khellin bei der Behandlung von Coronarspasmen eindeutig überlegen. These new compounds have a powerful vasodilator effect, especially on the coronary vessels. As was found in comparative tests, they are in this regard the Papaverine and the Khelline in treating Coronary spasms clearly superior.

Eine vergleichende Prüfung zwischen dem erfindungsgemäß hergestellten Xanthon-3-oxyessigsäureäthylester und dem aus dem Journal of the Chemical Society (London), 1956, S. 2142, bekannten Xanthon-1 -oxyessigsäureäthylester bezüglich der coronarerweiternden Wirkung nach der Methode von Kadatz, Arzneimittelforschung, 1959, S. 39, ergab, daß die erfindungsgemäß hergestellte Verbindung bei einer Dosierung von 50 y/kg bei Hunden eine Coronargefäßerweiterung von 94 °/0 für 3 Minuten zeigte, während mit dem bekannten Produkt keine sichere Wirkung feststellbar war. A comparative test between the one produced according to the invention Xanthone-3-oxyacetic acid ethyl ester and that from the Journal of the Chemical Society (London), 1956, p. 2142, known xanthone-1 -oxyacetic acid ethyl ester with respect to the coronary expanding effect according to the method of Kadatz, drug research, 1959, p. 39, showed that the compound prepared according to the invention with one dosage of 50 y / kg in dogs showed coronary vasodilation of 94 ° / 0 for 3 minutes, while with the known product no reliable effect could be determined.

Im Vergleich zu Papaverin und Khellin zeichnet sich der Xanthon-3-oxyessigsäureäthylester durch eine bedeutend geringere Toxizität aus. Bei intraperitonealer Injektion an Mäusen wurden folgende Toxizitätswerte erhalten: DLóo Papaverin ..... 0,24 g/kg Khellin . ...... 0,155 g/kg Xanthon-3-oxyessigsäureäthylester 0,9 g/kg Obwohl zur Erzielung gleicher gefäßerweiternder Wirkungen die doppelte Menge des Xanthon-3-oxyessigsäureäthylesters gegenüber Papaverin und die gleiche Menge gegenüber Khellin erforderlich ist, ergibt sich auf Grund der Toxizitätsunterschiede eine etwa doppelt so große therapeutische Breite für den Xanthon-3-oxyessigsäureäthylester im Vergleich zum Papaverin und eine etwa sechsfache therapeutische Breite im Vergleich zum Khellin. Außerdem ist die Wirkungsdauer der gleich wirksamen Dosen beim Xanthon-3-oxyessigsäureäthylester nahezu doppelt so lange wie beim Papaverin und um etwa 10°/0 länger als beim Khellin. Ferner bewirkt der Xanthon-3-oxyessigsäureäthylester in gleich wirksamer Dosierung eine viel geringere Blutdrucksenkung als Papaverin und Khellin (8 mm Hg gegenüber 33 bzw. 16 mm Hg). Compared to papaverine and khelline, xanthone-3-oxyacetic acid ethyl ester stands out by a significantly lower toxicity. With intraperitoneal injection on The following toxicity values were obtained in mice: DLóo papaverine ..... 0.24 g / kg Khellin. ...... 0.155 g / kg xanthone-3-oxyacetic acid ethyl ester 0.9 g / kg Although for Double the amount of xanthone-3-oxyacetic acid ethyl ester to achieve the same vasodilating effects to papaverine and the same amount to khelline is required Due to the differences in toxicity, the therapeutic one is about twice as large Width for the xanthone-3-oxyacetic acid ethyl ester compared to papaverine and about six times the therapeutic range compared to khellin. Also is the duration of action of the equally effective doses for ethyl xanthone-3-oxyacetate almost twice as much long as with papaverine and about 10% longer than with khelline. Furthermore, the xanthone-3-oxyacetic acid ethyl ester has an equally effective dosage a much smaller reduction in blood pressure than papaverine and khelline (8 mm Hg as opposed to 33 or 16 mm Hg).

Die Herstellung der Xanthon-3-oxyessigsäurealkylester der oben angegebenen allgemeinen Formel erfolgt dadurch, daß man 3-Oxyxanthon in an sich bekannter Weise mit Halogenessigsäureestern der Formel Hal CH2 - COOR, in der Hal ein Halogenatom darstellt und R die oben angegebene Bedeutung besitzt, umsetzt. The preparation of the xanthone-3-oxyacetic acid alkyl esters of the above general formula is made by using 3-oxyxanthone in a manner known per se with haloacetic acid esters of the formula Hal CH2 - COOR, in which Hal is a halogen atom represents and R has the meaning given above.

Beispiel Eine Mischung aus 8,5 g 3-Oxyxanthon, 7,5 g Bromessigsäureäthylester, 3 g wasserfreiem Kaliumcarbonat und 200 ccm Aceton wird 12 Stunden unter Rühren am Rückfluß erhitzt. Dann läßt man das erhaltene Reaktionsgemisch erkalten, saugt vom ausgeschiedenen Kaliumbromid ab und wäscht mit Aceton nach. Die vereinigten Filtrate werden bis zur Trockne abgedunstet, der verbleibende Rückstand wird mehrmals mit Wasser verrieben, jeweils abgesaugt und schließlich im Vakuumtrockenschrank getrocknet. Anschließend wird der erhaltene Rückstand aus Alkohol umkristallisiert. Es werden 9,5 g Xanthon-3-oxyessigsäureäthylester vom F. 122 bis 124"C erhalten. Example A mixture of 8.5 g of 3-oxyxanthone, 7.5 g of ethyl bromoacetate, 3 g of anhydrous potassium carbonate and 200 ccm of acetone are stirred for 12 hours heated to reflux. The reaction mixture obtained is then allowed to cool, and suction is applied of the precipitated potassium bromide and washes with acetone. The United Filtrates are evaporated to dryness, the remaining residue is several times rubbed with water, vacuumed off and finally in a vacuum drying cabinet dried. The residue obtained is then recrystallized from alcohol. 9.5 g of ethyl xanthone-3-oxyacetate with a melting point of 122 to 124 ° C. are obtained.

In der gleichen Weise werden bei Verwendung der entsprechenden Halogenessigsäurealkylester an Stelle von Bromessigsäureäthylester die folgenden Xanthon 3-oxyessigsäureester erhalten: Xanthon-3-oxyessigsäure-n-butylester, F. 102 bis 1040C; Xanthon-3-oxyessigsäure-i-propylester, F. 126 bis 127°C, Xanthon-3-oxyessigsäure-n-propylester, F. 116"C; Xanthon-3-oxyessigsäure-sec.butylester, F. 107 bis 108°C. In the same way when using the corresponding alkyl haloacetate instead of of ethyl bromoacetate the following xanthone 3-oxyacetic acid ester obtained: xanthone-3-oxyacetic acid n-butyl ester, m.p. 102 to 1040 ° C; I-propyl xanthone-3-oxyacetate, M.p. 126 to 127 ° C, xanthone-3-oxyacetic acid n-propyl ester, M.p. 116 "C; xanthone-3-oxyacetic acid sec.butyl ester, M.p. 107-108 ° C.

Claims (1)

Patentanspruch: Verfahren zur Herstellung von Xanthon-3-oxyessigsäurealkylestern der allgemeinen Formel in der R einen Alkylrest bedeutet, d a d u r c h gekennzeichnet, daß man 3-Oxyxanthon in an sich bekannter Weise mit Halogenessigsäureestern der Formel Hal CH2 - COOR, in der Hal ein Halogenatom darstellt und R die oben angegebene Bedeutung besitzt, umsetzt.Claim: Process for the preparation of xanthone-3-oxyacetic acid alkyl esters of the general formula in which R is an alkyl radical, characterized in that 3-oxyxanthone is reacted in a manner known per se with haloacetic esters of the formula Hal CH2 - COOR, in which Hal is a halogen atom and R has the meaning given above. In Betracht gezogene Druckschriften: Journal of the Chemical Society (London), 1956, S. 2142. Papers considered: Journal of the Chemical Society (London), 1956, p. 2142.
DEC20599A 1960-01-20 1960-01-20 Process for the preparation of xanthone-3-oxyacetic acid alkyl esters Pending DE1172271B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DEC20599A DE1172271B (en) 1960-01-20 1960-01-20 Process for the preparation of xanthone-3-oxyacetic acid alkyl esters
GB4413960A GB923132A (en) 1960-01-20 1960-12-22 New hydroxyxanthone derivatives
CH51761A CH392552A (en) 1960-01-20 1961-01-17 Process for the preparation of oxyxanthone derivatives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC20599A DE1172271B (en) 1960-01-20 1960-01-20 Process for the preparation of xanthone-3-oxyacetic acid alkyl esters

Publications (1)

Publication Number Publication Date
DE1172271B true DE1172271B (en) 1964-06-18

Family

ID=7016832

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC20599A Pending DE1172271B (en) 1960-01-20 1960-01-20 Process for the preparation of xanthone-3-oxyacetic acid alkyl esters

Country Status (3)

Country Link
CH (1) CH392552A (en)
DE (1) DE1172271B (en)
GB (1) GB923132A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175376A2 (en) * 1984-09-21 1986-03-26 Chugai Seiyaku Kabushiki Kaisha Xanthone derivatives and process for producing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175376A2 (en) * 1984-09-21 1986-03-26 Chugai Seiyaku Kabushiki Kaisha Xanthone derivatives and process for producing the same
EP0175376A3 (en) * 1984-09-21 1988-07-13 Chugai Seiyaku Kabushiki Kaisha Xanthone derivatives and process for producing the same
US4816479A (en) * 1984-09-21 1989-03-28 Chugai Seiyaku Kabushiki Kaisha Xanthone derivatives and process for producing the same

Also Published As

Publication number Publication date
GB923132A (en) 1963-04-10
CH392552A (en) 1965-05-31

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