DE884368C - Process for the preparation of amidrazones - Google Patents

Process for the preparation of amidrazones

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Publication number
DE884368C
DE884368C DEJ4502A DEJ0004502A DE884368C DE 884368 C DE884368 C DE 884368C DE J4502 A DEJ4502 A DE J4502A DE J0004502 A DEJ0004502 A DE J0004502A DE 884368 C DE884368 C DE 884368C
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Prior art keywords
amidrazones
benzamidrazone
preparation
alcohol
hydrazones
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DEJ4502A
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German (de)
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Dietrich Dr Jerchel
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Individual
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C257/00Compounds containing carboxyl groups, the doubly-bound oxygen atom of a carboxyl group being replaced by a doubly-bound nitrogen atom, this nitrogen atom not being further bound to an oxygen atom, e.g. imino-ethers, amidines
    • C07C257/10Compounds containing carboxyl groups, the doubly-bound oxygen atom of a carboxyl group being replaced by a doubly-bound nitrogen atom, this nitrogen atom not being further bound to an oxygen atom, e.g. imino-ethers, amidines with replacement of the other oxygen atom of the carboxyl group by nitrogen atoms, e.g. amidines
    • C07C257/22Compounds containing carboxyl groups, the doubly-bound oxygen atom of a carboxyl group being replaced by a doubly-bound nitrogen atom, this nitrogen atom not being further bound to an oxygen atom, e.g. imino-ethers, amidines with replacement of the other oxygen atom of the carboxyl group by nitrogen atoms, e.g. amidines having nitrogen atoms of amidino groups further bound to nitrogen atoms, e.g. hydrazidines

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung von Amidrazonen Die Erfindung betrifft ein Verfahren zur Herstellung von Amidrazonen. Als Amidrazone bezeichnet man die Hydrazone von Säureamiden. Dieselben entsprechen der allgemeinen Formel Hierbei bedeutet R einen beliebigen organischen Rest, wie er bei organischen Säuren vorkommt, und R' Wasserstoff oder einen substituierten oder unsubstituierten Alkyl- oder Arylrest.Process for the preparation of amidrazones The invention relates to a process for the preparation of amidrazones. The hydrazones of acid amides are called amidrazones. They correspond to the general formula Here, R denotes any organic radical as occurs in organic acids, and R 'denotes hydrogen or a substituted or unsubstituted alkyl or aryl radical.

Bisher wurden die Amidrazone entweder durch Umsetzung von Iminoäther-hydrochloriden mit Hydrazinen (vgl. Pinner, Liebigs Annalen der Chemie, 297, S. 221 [18g7]) oder durch Reduktion von Tetrazoliumsalzen (vgl. Jerchel und Kühn, Liebigs Annalen der Chemie 568, S. 185 [195o]) hergestellt.So far, the amidrazones have been produced either by reacting imino ether hydrochlorides with hydrazines (cf. Pinner, Liebigs Annalen der Chemie, 297, p. 221 [18g7]) or by reducing tetrazolium salts (cf. Jerchel and Kühn, Liebigs Annalen der Chemie 568, P. 185 [195o]).

Es wurde nun gefunden, daB man die gleichen oder weitere, bisher nicht zugänglich gewesene Amidrazone auf besonders einfache Weise in sehr guter Ausbeute herstellen kann, wenn man Alkyl- oder Arylnitroformaldehydhydrazone katalytisch hydriert.It has now been found that one has the same or more, so far not Amidrazones that have been accessible in a particularly simple manner in very good yield can produce if one catalytically alkyl or arylnitroformaldehyde hydrazones hydrogenated.

Die als Ausgangsmaterial verwendeten Nitroformaldehydhydrazone kann man z. B. aus den Alkalisalzen von Alkyl- oder Arylnitromethan durch Umsetzung mit Diazoniumsalzen herstellen (vgl. V. Meyer und G. Ambühl, Berichte der Deutschen Chemischen Gesellschaft, 8, S.751, 1073 [z875]). Aus diesen gewinnt man dann leicht durch katalytische Reduktion die entsprechenden Amidrazone. Die Umsetzung geht etwa nach folgender Gleichung vor sich In den Formeln haben R und R' die oben angegebene Bedeutung.The nitroformaldehyde hydrazones used as starting material can be used, for. B. from the alkali metal salts of alkyl or aryl nitromethane by reaction with diazonium salts (cf. V. Meyer and G. Ambühl, reports of the German Chemical Society, 8, p.751, 1073 [z875]). The corresponding amidrazones are then easily obtained from these by catalytic reduction. The implementation proceeds roughly according to the following equation In the formulas, R and R 'have the meanings given above.

Als Katalysatoren für die erfindungsgemäße Reduktion sind alle üblichen Katalysatoren, wie Edelmetalle, z. B. Palladium, das gegebenenfalls auf Trägern, wie Tierkohle oder Bariumsulfat, niedergeschlagen ist, oder Raney-Nickel, geeignet.The catalysts for the reduction according to the invention are all customary Catalysts, such as precious metals, e.g. B. Palladium, which may be on supports, such as animal charcoal or barium sulfate, or Raney nickel, are suitable.

Als Lösungsmittel für die Hydrienxngsansätze kann man die üblichen Lösungsmittel verwenden, vor allem Alkohol, Essigsäureäthylester oder Tetrahydrofuran. Die erfindungsgemäße katalytische Hydrierung kann bei Zimmertemperatur und ohne Anwendung von Druck durchgeführt werden.The usual solvents can be used as the solvent for the hydrogenation batches Use solvents, especially alcohol, ethyl acetate or tetrahydrofuran. The inventive catalytic hydrogenation can at room temperature and without Application of pressure can be carried out.

Bei dem -erfindungsgemäßen Verfahren werden Ausbeuten zwischen etwa 45 und 960/, der Theorie erzielt.In the process according to the invention, yields between about 45 and 960 % of theory are achieved.

In der folgenden Tabelle sind einige der nach dem erfindungsgemäßen Verfahren erhaltenen Substanzen aufgezählt. Tabelle Amidrazone aus Nitrohydrazonen Schmelzpunkte des der entsprechenden Chlorhydrats Nitroverbindung °C °C co-Phenyl-benzamidrazon ........................................ 124 101 co-Tolyl-benzamidrazon .......................................... 118 bis 12o 1i1 bis 112 co-(ß-Naphtlhyl)-benzamidrazon . . . . . . . . . . . . . . . . . . . .. . . . . .. . . . . . . . . 215 bis 217 149 bis iSo co-(p-Diplhenylyl)-benzamidrazon ................................. 221 bis 223 132 co-(p-n-Butoxyphenyl)-benzamidrazon ............................. Zog 88 co-(p-Methoxyphenyl)-benzamidrazon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 94 bis 95 co-(p-Benzyloxyphenyl)-benzamidrazon . . . . . . . . . . . . . . . . . . . . . . . . .. 124 123 bis 124 üo-(3, 4-Dimethylphenyl)-benzamidrazon . . . . . . . . . . . . . . . . . . . . . . . . . . . 237 bis 238 37 co-(p-Aminophenyl)-formamidrazon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . igo 149 w-(Phenyl)-acetamidrazon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . zig bis 122 134 bis 135 co-(p-Carbäthoxyplhenyl)-benzamidrazon ........................... 172 bis 173 ,- o, o'-Tetramethylen-bis-(co-4-oxyphenyl)-benzamidrazon . . . . . . . . . .. . . i7o bis 171 140 Die Amidrazone sind wegen ihrer pharmakologischen Eigenschaften von Interesse.Some of the substances obtained by the process according to the invention are listed in the following table. Tabel Amidrazones from nitrohydrazones Melting points of the corresponding Chlorohydrate nitro compound ° C ° C co-phenyl-benzamidrazone ........................................ 124 101 co-tolyl-benzamidrazone .......................................... 118 to 12o 1i1 to 112 co- (ß-naphthyl) -benzamidrazone. . . . . . . . . . . . . . . . . . . ... . . . ... . . . . . . . 215 to 217 149 to iSo co- (p-diplhenylyl) -benzamidrazone ................................. 221 to 223 132 co- (pn-butoxyphenyl) -benzamidrazone ............................. Zog 88 co- (p-methoxyphenyl) benzamidrazone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 94 to 95 co- (p-benzyloxyphenyl) benzamidrazone. . . . . . . . . . . . . . . . . . . . . . . . .. 124 123 to 124 üo - (3, 4-Dimethylphenyl) -benzamidrazone. . . . . . . . . . . . . . . . . . . . . . . . . . . 237 to 238 37 co- (p-aminophenyl) -formamidrazone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . igo 149 w- (phenyl) acetamidrazone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . umpteen to 122 134 to 135 co- (p-carbethoxyplhenyl) -benzamidrazone ........................... 172 to 173, - o, o'-tetramethylene-bis- (co-4-oxyphenyl) -benzamidrazone. . . . . . . . . ... . i7o to 171 140 The amidrazones are of interest because of their pharmacological properties.

Beispiel i co-Phenyl-benzamidrazon 300 mg Phenylnitroformaldehydphenylhydrazon, welches man aus Benzaldehydphenylhydrazon und Amylnitrit (vgl, E. Bamberger und W. Pemsel, Berichte der Deutschen Chemischen Gesellschaft 36, S. 66 [igo3]) oder aus Phenylnitromethan und Phenyldiazoniumacetat (vgl. E. Bamberger, Berichte der Deutschen Chemischen Gesellschaft 33, S. 1787 [igoo]) hergestellt hat, wurden in 5o ccm g4°/oigem Alkohol gelöst und mit 25o mg Pd/Ba SO, (3°/oig) katalytisch hydriert. Nach go Minuten waren 3 Mol Wasserstoff aufgenommen. Durch Einleiten von Chlorwasserstoffgas wurde das Chlorhydrat des Amidrazons zunächst als zähflüssiges Öl, nach dem Durchreiben mit Essigsäureäthylester kristallin erhalten. Nadeln aus Alkohol. F. = 124°; Pikrat: F. = 195 bis i96°. Ausbeute an Reinsubstanz = 8o0/, der Theorie. Beispiel 2 c)-Tolyl-benzamidrazon Analog der Vorschrift von E. Bamberger für das Phenylnitroformaldehydphenylhydrazon (vgl. Berichte der Deutschen Chemischen Gesellschaft 33. S. 1787 [igoo]) werden 5 g des Natriumsalzes des Phenylnitromethans in 25 ccm 2 n-Natronlauge gelöst. Zu dieser Lösung gibt man langsam in 5 ccm Eisessig gelöstes Tolyldiazoniumchlorid (aus 3,3 g p Toluidin in 2o ccm Salzsäure). Das Kupplungsprodukt fällt als braunes Öl an, das nach etwa io Minuten kristallisiert. Nach dem Umkristallisieren aus Alkohol werden 3,5 g Phenylnitroformaldelhydtolyllhydrazon als rote Nadeln erhalten. F. - iii bis 112°. Ausbette: 40 °/" der Theorie. C"HisNa0z Ber. C 65,87 H 5,.i3 N 16,46 (25527) Gef. C 65,87 H 5,31' N 16,36 3,5 g des Hydrazons werden, gelöst in i5o ccm Alkohol, der katalytischen Hydrierung mit Raney-Nickel unterworfen. Das Amidrazon kann zunächst als Pikrat (3,5 g) vom F. = 157 bis 159 isoliert werden. Die Zersetzung des Pikrats mit Natronlauge führt zur Amidrazonbase. Das Amidrazon wurde als Hydrochlorid zur Analyse gebracht; sein Schmelzpunkt ließ sich nicht festlegen. Das Hydrobromid zeigt den F. = 118 bis 12o°. Ausbeute: 9¢°/o der Theorie. C14H"NSHCl # 1/2H.0 Ber. C 62,1o H 6,33 N 15,52 (270,7) Gef. C 62,15 H 6,48 N 15,86.Example i co-phenyl-benzamidrazone 300 mg phenylnitroformaldehyde-phenylhydrazone, which is obtained from benzaldehyde-phenylhydrazone and amyl nitrite (cf. E. Bamberger and W. Pemsel, reports from the German Chemical Society 36, p. 66 [igo3]) or from phenylnitromethane and phenyldiazonium acetate (cf. E. Bamberger, reports of the German Chemical Society 33, p. 1787 [igoo]), were dissolved in 50 ccm of 4% alcohol and catalytically hydrogenated with 250 mg of Pd / Ba SO, (3%). After 4 minutes, 3 mol of hydrogen had been absorbed. By introducing hydrogen chloride gas, the hydrate of amidrazone was initially obtained as a viscous oil and, after trituration with ethyl acetate, in crystalline form. Alcohol needles. M.p. = 124 °; Picrat: F. = 195 to i96 °. Yield of pure substance = 800 /, of theory. Example 2 c) -Tolyl-benzamidrazone Analogously to the instructions of E. Bamberger for phenylnitroformaldehyde-phenylhydrazone (cf. reports of the Deutsche Chemischen Gesellschaft 33, p. 1787 [igoo]), 5 g of the sodium salt of phenylnitromethane are dissolved in 25 ccm 2 N sodium hydroxide solution . Tolyldiazonium chloride dissolved in 5 cc of glacial acetic acid (from 3.3 gp of toluidine in 20 cc of hydrochloric acid) is slowly added to this solution. The coupling product is obtained as a brown oil which crystallizes after about 10 minutes. After recrystallization from alcohol, 3.5 g of phenylnitroformaldelhydtolyl hydrazone are obtained as red needles. F. - iii to 112 °. Ausbet: 40% of theory. C "HisNa0z calcd. C 65.87 H 5, .i3 N 16.46 (25527) Found C, 65.87, H, 5.31 'N, 16.36 3.5 g of the hydrazone, dissolved in 150 cc of alcohol, are subjected to catalytic hydrogenation with Raney nickel. The amidrazone can first be isolated as a picrate (3.5 g) from F. = 157 to 159. The decomposition of the picrate with caustic soda leads to the amidrazone base. The amidrazone was taken for analysis as the hydrochloride; its melting point could not be determined. The hydrobromide shows the F. = 118 to 12o °. Yield: 9% of theory. C14H "NSHCl # 1 / 2H.0 Calcd. C 62.1o H 6.33 N 15.52 (270.7) Found C 62.15 H 6.48 N 15.86.

Claims (1)

PATLNTANSPRUCH: Verfahren zur Herstellung von Amidrazonen der allgemeinen Formel worin R einen beliebigen organischen Rest, wie er bei organischen Säuren vorkommt, und R' Wasserstoff oder einen gegebenenfalls substituierten A lkyl- oder Arylrest bedeutet, dadurch gekennzeichnet, daß man gegebenenfalls substituierte Alkyl- oder Arylnitroformaldehydhydrazone katalytisch hydriert.PATENT CLAIM: Process for the preparation of amidrazones of the general formula where R is any organic radical as occurs in organic acids and R 'is hydrogen or an optionally substituted alkyl or aryl radical, characterized in that optionally substituted alkyl or arylnitroformaldehyde hydrazones are catalytically hydrogenated.
DEJ4502A 1951-08-14 1951-08-14 Process for the preparation of amidrazones Expired DE884368C (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211790A (en) * 1961-01-31 1965-10-12 Du Pont N-arylmethyleneperfluoroacylamidrazones

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211790A (en) * 1961-01-31 1965-10-12 Du Pont N-arylmethyleneperfluoroacylamidrazones

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