DE869204C - Process for the preparation of diphenylmethane-4, 4'-diacetonitrile - Google Patents

Process for the preparation of diphenylmethane-4, 4'-diacetonitrile

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Publication number
DE869204C
DE869204C DEB6846D DEB0006846D DE869204C DE 869204 C DE869204 C DE 869204C DE B6846 D DEB6846 D DE B6846D DE B0006846 D DEB0006846 D DE B0006846D DE 869204 C DE869204 C DE 869204C
Authority
DE
Germany
Prior art keywords
diphenylmethane
diacetonitrile
preparation
parts
cyanide
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.)
Expired
Application number
DEB6846D
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German (de)
Inventor
Gerd Dr Kochendoerfer
Werner Dr Rohland
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to DEB6846D priority Critical patent/DE869204C/en
Application granted granted Critical
Publication of DE869204C publication Critical patent/DE869204C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C253/00Preparation of carboxylic acid nitriles
    • C07C253/14Preparation of carboxylic acid nitriles by reaction of cyanides with halogen-containing compounds with replacement of halogen atoms by cyano groups

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung von Diphenylmethan-4, 4'-diacetonitril Fis ist bekannt, daß man Halogenabkömmlinge verschiedener ringförmiger Verbindungen mit 1letallcyaniden in die entsprechenden organischen Cyanverbindungen überführen kann. So hat man schon Halogenverbindungen der Benzol-, Naphthalin- oder Antliracenreihe, die das Halogenatom am Kern substituiert enthalten, ferner auch schon Benzylchlorid, in dem das Chlor an die Seitenkette gebunden ist, mit Metallcyaniden, wie Kupfer-(i)-cyanid und Kaliumcyanid, umgesetzt. Im Gegensatz zu den am Kern mit Halogen substituierten Ringverbindungen sind beim q., q.'-Dichlormethyldiphetiylmethan die Chloratome sehr locker gebunden, so daß es bisher nicht gelang, hieraus das Dinitril zu erhalten. Nach Untersuchungen von C o n n e r a d e (Chemisches Zentralblatt 1933, Bd. i, S. 5,5) wurde vielmehr bei der Umsetzung mit Kaliumcyanid ebenso wie bei der Behandlung mit Alkalien. Ammoniak, Silbernitrat und Silbernitrit nur ein Chloratom ausgetauscht und gleichzeitig das entstandene Monosubstitutionsprodukt zu einem Harz polymerisierf.Process for the preparation of diphenylmethane-4, 4'-diacetonitrile Fis it is known that halogen derivatives of various ring-shaped compounds are obtained Convert with 1letallcyaniden into the corresponding organic cyano compounds can. So one already has halogen compounds of the benzene, naphthalene or antliracene series, which contain the halogen atom substituted on the nucleus, also already benzyl chloride, in which the chlorine is bound to the side chain, with metal cyanides, such as copper (i) cyanide and potassium cyanide. In contrast to those substituted with halogen at the core In q., Q .'-dichloromethyldiphetiylmethane, the chlorine atoms are very ring compounds loosely bound, so that it has not been possible to obtain the dinitrile therefrom. According to studies by Con n e r a d e (Chemisches Zentralblatt 1933, Vol. I, P. 5.5) was rather in the implementation with potassium cyanide as well as in the treatment with alkalis. Ammonia, silver nitrate and silver nitrite only exchanged one chlorine atom and at the same time polymerize the resulting monosubstitution product to a resin.

Es wurde nun gefunden, daß man einen Austausch beider Chloratome des .4, q.'-Dichlormethyldiphenylmethans durch eine Cyangruppe erzielt, wenn man diese Verbindung in reinem Zustand mit mindestens 2 Äquivalenten ,eines Metallcyanids umsetzt. Dabei bildet sich in sehr guter Ausbeute Diphenylmethan-4; 4-diacetonitril, das durch Behandlung mit verseifend -wirkenden Mitteln ebenfalls in sehr guter Ausbeute in Diphenylmethan-4, 4'-diessigsäure übergeführt werden kann.It has now been found that an exchange of both chlorine atoms des .4, q .'-dichloromethyldiphenylmethane achieved by a cyano group, if this Compound in the pure state with at least 2 equivalents of a metal cyanide implements. This forms in a very good yield Diphenylmethane-4; 4-diacetonitrile, which is also produced by treatment with saponifying agents can be converted into diphenylmethane-4, 4'-diacetic acid in very good yield.

Der Austausch der Chloräforrie der Chlormethylgruppen gegen Cyangruppen geschieht am einfachsten durch Behandeln mit mindestens 2 Mol eines Alkalicyanids, doch können auch andere Metallcyanide verwendet werden, wie Calciumcyanid oder Kupfer-(r)-cyanid. Das 4,4'-Dichlormethyldiphenylmethan wird möglichst rein verwendet, insbesondere soll es möglichst zinkfrei,sein, wenn bei seiner Herstellung Zinkchlorid als Katalysator verwendet wurde. Die Überführung des Diphenylmethan-4, 4 -diacetonitrils in die Diphenylmethan-4, 4 -diessigsäure geschieht durch Behandeln mit für die Verseifung-von Cyangruppen zu Carboxylgruppen geeigneten, an sich bekannten Mitteln, °wie mit verdünnten Mineralsäuren oder- alkoholischen Alkalihydroxydlösungen.The exchange of the chloroformation of the chloromethyl groups for cyano groups The easiest way to do this is by treating with at least 2 moles of an alkali metal cyanide, however, other metal cyanides can also be used, such as calcium cyanide or copper (r) cyanide. The 4,4'-dichloromethyldiphenylmethane is used as pure as possible, in particular it should be as free of zinc as possible if zinc chloride is used as a catalyst in its production was used. The conversion of the diphenylmethane-4, 4 -diacetonitrile in the Diphenylmethane-4,4-diacetic acid is done by treating with for the saponification-of Cyano groups to carboxyl groups suitable, per se known agents, such as with dilute Mineral acids or alcoholic alkali hydroxide solutions.

Das nach vorliegendem Verfahren leicht zugängliche Diphenylmethän-4, 4 -diacetonitril ist ein wertvolles Zwischenerzeugnis, insbescndere_ zur Herstellung- von Polyamiden. Die- im folgenden Beispiel genannten Teile sind Gewichtsteile.Diphenylmethane-4, which is easily accessible according to the present process, 4 -diacetonitrile is a valuable intermediate product, especially for the production of polyamides. The parts mentioned in the following example are parts by weight.

Beispiel in eine. heiße Lösung von 5oo Teilen reinem, destilliertem 4, 4'-Dichlormethyldiphenylmethan in 2500 bis 5ooo Teilen Methanol läßt man unter Rühren eine Lösung von 5oo Teilen Kaliumcyanid in 5oö Teilen Wasser einfließen und erhitzt das Gemisch 3 Stunden lang zum Sieden. Nach dem Erkalten saugt man die ausgeschiedenen Kristalle ab, w iisclit sie mit etwas Alkohol und dann mit Wasser .und trocknet sie. Man erhält so das Diphenylmethan-4, 4 -diacetonitril praktisch rein in einer Ausbeute von 4o5 Teilen = 87 % der berechneten Menge (F. = 112 bis 1i3° nach Umkristallisieren aus Alkohol).Example in a. hot solution of 500 parts of pure, distilled 4,4'-dichloromethyldiphenylmethane in 2500 to 5000 parts of methanol, a solution of 500 parts of potassium cyanide in 500 parts of water is allowed to flow in with stirring and the mixture is heated to the boil for 3 hours. After cooling, the precipitated crystals are filtered off with suction, washed with a little alcohol and then with water, and dried. Diphenylmethane-4,4-diacetonitrile is thus obtained in practically pure form in a yield of 405 parts = 87% of the calculated amount (mp = 112-113 ° after recrystallization from alcohol).

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Diphenylmethan-4, 4 -diacetonitril, dadurch gekennzeichnet, daß man reines 4, 4 -Dichlormethyldiphenylmethan mit mindestens 2 Äquivalenten eines Metallcyanids bei erhöhter Temperatur umsetzt.PATENT CLAIM: Process for the production of diphenylmethane-4, 4 diacetonitrile, characterized in that pure 4,4-dichloromethyldiphenylmethane is used with at least 2 equivalents of a metal cyanide at elevated temperature.
DEB6846D 1943-07-18 1943-07-18 Process for the preparation of diphenylmethane-4, 4'-diacetonitrile Expired DE869204C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB6846D DE869204C (en) 1943-07-18 1943-07-18 Process for the preparation of diphenylmethane-4, 4'-diacetonitrile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB6846D DE869204C (en) 1943-07-18 1943-07-18 Process for the preparation of diphenylmethane-4, 4'-diacetonitrile

Publications (1)

Publication Number Publication Date
DE869204C true DE869204C (en) 1953-03-05

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DEB6846D Expired DE869204C (en) 1943-07-18 1943-07-18 Process for the preparation of diphenylmethane-4, 4'-diacetonitrile

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093676A (en) * 1959-05-18 1963-06-11 Monsanto Chemicals Alpha-cyanoalkyl-aromatic-methyl compounds and their production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093676A (en) * 1959-05-18 1963-06-11 Monsanto Chemicals Alpha-cyanoalkyl-aromatic-methyl compounds and their production

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