CH401024A - Process for the preparation of 2-chloro-6-nitro-benzonitrile - Google Patents
Process for the preparation of 2-chloro-6-nitro-benzonitrileInfo
- Publication number
- CH401024A CH401024A CH465160A CH465160A CH401024A CH 401024 A CH401024 A CH 401024A CH 465160 A CH465160 A CH 465160A CH 465160 A CH465160 A CH 465160A CH 401024 A CH401024 A CH 401024A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- nitro
- chloro
- benzonitrile
- dichloronitrobenzene
- Prior art date
Links
- ZHLCARBDIRRRHD-UHFFFAOYSA-N 2-chloro-6-nitrobenzonitrile Chemical compound [O-][N+](=O)C1=CC=CC(Cl)=C1C#N ZHLCARBDIRRRHD-UHFFFAOYSA-N 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 9
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 14
- CMVQZRLQEOAYSW-UHFFFAOYSA-N 1,2-dichloro-3-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC(Cl)=C1Cl CMVQZRLQEOAYSW-UHFFFAOYSA-N 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 239000002585 base Substances 0.000 claims description 7
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 4
- 241000233866 Fungi Species 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- OISVCGZHLKNMSJ-UHFFFAOYSA-N 2,6-dimethylpyridine Chemical compound CC1=CC=CC(C)=N1 OISVCGZHLKNMSJ-UHFFFAOYSA-N 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 2
- 241000223194 Fusarium culmorum Species 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 241000233622 Phytophthora infestans Species 0.000 description 2
- 241000317942 Venturia <ichneumonid wasp> Species 0.000 description 2
- HOPRXXXSABQWAV-UHFFFAOYSA-N anhydrous collidine Natural products CC1=CC=NC(C)=C1C HOPRXXXSABQWAV-UHFFFAOYSA-N 0.000 description 2
- UTBIMNXEDGNJFE-UHFFFAOYSA-N collidine Natural products CC1=CC=C(C)C(C)=N1 UTBIMNXEDGNJFE-UHFFFAOYSA-N 0.000 description 2
- 239000000417 fungicide Substances 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 2
- GFYHSKONPJXCDE-UHFFFAOYSA-N sym-collidine Natural products CC1=CN=C(C)C(C)=C1 GFYHSKONPJXCDE-UHFFFAOYSA-N 0.000 description 2
- RNABGKOKSBUFHW-UHFFFAOYSA-N 1,3-dichloro-5-nitrobenzene Chemical compound [O-][N+](=O)C1=CC(Cl)=CC(Cl)=C1 RNABGKOKSBUFHW-UHFFFAOYSA-N 0.000 description 1
- RZKKOBGFCAHLCZ-UHFFFAOYSA-N 1,4-dichloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC(Cl)=CC=C1Cl RZKKOBGFCAHLCZ-UHFFFAOYSA-N 0.000 description 1
- BFCFYVKQTRLZHA-UHFFFAOYSA-N 1-chloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1Cl BFCFYVKQTRLZHA-UHFFFAOYSA-N 0.000 description 1
- KMAQZIILEGKYQZ-UHFFFAOYSA-N 1-chloro-3-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC(Cl)=C1 KMAQZIILEGKYQZ-UHFFFAOYSA-N 0.000 description 1
- OHDYZVVLNPXKDX-UHFFFAOYSA-N 2,3-dichlorobenzonitrile Chemical compound ClC1=CC=CC(C#N)=C1Cl OHDYZVVLNPXKDX-UHFFFAOYSA-N 0.000 description 1
- UUQLXHYNIWFUDE-UHFFFAOYSA-N 2,4-dichloro-1-nitrobenzene Chemical compound ClC1=C(C=CC(=C1)Cl)[N+](=O)[O-].ClC1=CC(=C(C=C1)[N+](=O)[O-])Cl UUQLXHYNIWFUDE-UHFFFAOYSA-N 0.000 description 1
- BSKHPKMHTQYZBB-UHFFFAOYSA-N 2-methylpyridine Chemical compound CC1=CC=CC=N1 BSKHPKMHTQYZBB-UHFFFAOYSA-N 0.000 description 1
- CZGCEKJOLUNIFY-UHFFFAOYSA-N 4-Chloronitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(Cl)C=C1 CZGCEKJOLUNIFY-UHFFFAOYSA-N 0.000 description 1
- RQMWVVBHJMUJNZ-UHFFFAOYSA-N 4-chloropyridin-2-amine Chemical group NC1=CC(Cl)=CC=N1 RQMWVVBHJMUJNZ-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- -1 alkali metal cyanide Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- DOBRDRYODQBAMW-UHFFFAOYSA-N copper(i) cyanide Chemical compound [Cu+].N#[C-] DOBRDRYODQBAMW-UHFFFAOYSA-N 0.000 description 1
- HPYNZHMRTTWQTB-UHFFFAOYSA-N dimethylpyridine Natural products CC1=CC=CN=C1C HPYNZHMRTTWQTB-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XQTLDIFVVHJORV-UHFFFAOYSA-N tecnazene Chemical compound [O-][N+](=O)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl XQTLDIFVVHJORV-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C255/00—Carboxylic acid nitriles
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/14—Preparation of carboxylic acid nitriles by reaction of cyanides with halogen-containing compounds with replacement of halogen atoms by cyano groups
Landscapes
- 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)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Pyridine Compounds (AREA)
Description
Verfahren zur Herstellung von 2-Chlor-6-nitro-benzonitril Die Erfindung betrifft ein Verfahren zur Herstel lung von 2-Chlor-6-nitro-benzonitril.
Es wurde gefunden, dass 2-Chlor-6-nitro benzo- nitril gegenüber vergleichbaren, bekannten Fungi- ciden überlegene Eigenschaften aufweist und daher als Wirkstoff in fungiciden Mitteln geeignet ist. So wurde festgestellt, dass in bezug auf die Schimmel pilze Fusarium culmorum, Venturia inäqualis und Phytophthora infestans 2-Chlor-6-nitro-benzonitril viel stärker wirksam ist als vergleichbare Verbindun gen. Dies wurde z.
B. in den folgenden Vergleichs versuchen mit Verbindungen nach einer deutschen Patentschrift festgestellt, wobei folgende Schimmel pilzarten verwendet wurden: Fusarium culmorum (F)
EMI0001.0004
Geprüfte <SEP> Verbindungen <SEP> F <SEP> V <SEP> P
<tb> Erfindungsgemässe <SEP> Verbindung:
<tb> 2-Chlor-6-nitro-benzonitril <SEP> 5,0 <SEP> 5,5 <SEP> 4,4
<tb> Verbindungen <SEP> nach <SEP> einem
<tb> deutschen <SEP> Patent:
<tb> 1-Nitro-2-chlorbenzol <SEP> < 3 <SEP> < 3 <SEP> < 3
<tb> 1 <SEP> Nitro-3-chlorbenzol <SEP> < 3 <SEP> < 3 <SEP> < 3
<tb> 1-Nitro-4-chlorbenzol <SEP> < 3 <SEP> < 3 <SEP> < 3
<tb> 1-Nitro-2,4-dichlorbenzol <SEP> 3 <SEP> bis <SEP> 4 <SEP> 3 <SEP> bis <SEP> 4 <SEP> 3 <SEP> bis <SEP> 4
<tb> 1-Nitro-2,5-dichlorbenzol <SEP> < 3 <SEP> < 3 <SEP> < 3
<tb> 1-Nitro-3,5-dichlorbenzol <SEP> 3 <SEP> bis <SEP> 4 <SEP> 3 <SEP> bis <SEP> 4 <SEP> 3 <SEP> bis <SEP> 4
<tb> 1 <SEP> Nitro-2,3,5,6-tetrachlorbenzol <SEP> - <SEP> 4 <SEP> bis <SEP> 5 <SEP> - Das vorliegende Patent betrifft ein Verfahren zur Herstellung von 2-Chlor-l-nitro-benzonitril, das da- Venturia inäqualis (V) Phytophthora infestans (P).
Die zu prüfenden Verbindungen wurden in einer Konzentrationsreihe angewendet, und es wurden jeweils die Konzentrationen bestimmt, die eine 95% ige Abtötung der Pilze herbeiführten. In der nachfolgenden Tabelle sind die Versuchsergebnisse angeführt, und zwar geben die Zahlen den negativen Logarithmus der vorerwähnten Konzentration an. Die Bezeichnung 3 bedeutet, dass bei einer Konzentra tion von 1%0 keine Wirkung festgestellt wurde, und - bedeutet: keine Wirksamkeit.
Aus der Tabelle ist klar ersichtlich, dass die erfindungsgemässe Verbindung meistens um das Hun dertfache wirksamer ist als die Verbindungen nach der fraglichen Patentschrift. durch gekennzeichnet ist, dass man 2,3-Dichlornitro- benzol in Gegenwart einer tertiären aromatischen Stickstoffbase mit Cuprocyanid und allenfalls zudem mit einem Alkalimetallcyanid umsetzt.
Die Umsetzung wird z. B. bei einer Temperatur zwischen 140 und 240'C und besonders zwischen 160 und 200 C durchgeführt.
Geeignete tertiäre Stickstoffbasen sind: Pyridin oder durch Alkylgruppen substituierte Pyridine, z. B. Collidin, Picoline oder Lutidine, und weiter Chinolin. Pyridin wird bevorzugt. Die Menge der tertiären Base wird z. B. derart gewählt, dass weniger als etwa 0,5 Mol und vorzugsweise 0,05 bis 0,3 Mol je Mol 2,3-Dichlornitrobenzol verwendet werden.
Wenn man als Cyanid nur Cuprocyanid verwen det, werden vorzugsweise äquimolare Mengen hin sichtlich 2,3-Dichlornitrobenzol angewandt. Die Ver wendung grösserer Mengen gibt keine bessere Aus beute an 2-Chlor-6-nitro-benzonitril, bezogen auf das eingesetzte 2,3-Dichlorbenzonitril. Cuprocyanid kann vorteilhaft bis zu .etwa 70 Molprozent durch ein Alkalicyanid,
vorzugsweise Natrium.- oder Kalium- cyanid, ersetzt werden.
Das Verfahren sei an Hand des Beispiels 1 und der in der Tabelle zusammengefassten Beispiele, welche analog Beispiel 1 durchgeführt wurden, erläu tert.
<I>Beispiel</I> 960 g (5 g Mol) 2,3-Dichlornitrobenzol wurden auf 165'C erhitzt. In 31/'2 Stunden wurde portionen- weise und unter Rühren ein Gemisch aus 447 g Cuprocyanid und 50 cm,' Pyridin hinzugegeben. Wäh rend 30 Minuten nach der Zugabe wurde, die Tempe ratur des Reaktiongemisches zwischen 165 und l70 C gehalten. Die Reaktion war exotherm. Das Reaktionsgemisch wurde in 2,5 Liter warmes Chloro form ausgegossen.
Die unlöslichen Kupfersalze bilde ten nach einigen Minuten einen grobkörnigen Nieder schlag. Dieser wurde abgesaugt, gepulvert und mit Benzol extrahiert. Die erhaltene Waschflüssigkeit wurde mit der Chloroformlösung gemischt, das Ganze nacheinander zweimal mit 250 cm3 konzentrierter Salzsäure (spezifisches Gewicht 1,19) und dreimal mit 500 cm3 Wassergewaschen und dann eingedampft.
Der Rückstand (865 g) wurde fünfmal mit 500 cm3 Petroläther (Siedepunktstrecke 40 bis 60 C) extra hiert. Das nicht im Petroläther lösliche 2-Chlor-6- nitro-benzonitril hatte ein Gewicht von 681 g (75 @) und einen Schmelzpunkt von 117 bis 119 C. Aus dem Petroläther konnten 184 g unverändertes 2,3-Di- chlornitrobenzol zurückgewonnen werden.
Insgesamt wurde also eine Ausbeute von 93 ö 2-Chlor-6-nitro- benzonitril erhalten.
In den in der Tabelle angeführten Beispielen wur den jeweils 0,1 g/Mol 2,3-Dichlornitrobenzol als Aus gangsmaterial verwendet. Nacheinander sind in den Spalten dieser Tabelle erwähnt:
die Nummer des Bei spiels, die verwendeten Mengen Cuprocyanid, Kalium- cyanid bzw. Natriumcyanid und Pyridin (in g/Mol), die Reaktionstemperatur in Celsiusgraden, die Aus beute an 2-Chlor-6-nitrobenzonitril in Prozenten des verwendeten 2,3-Dichlornitrobenzols und der Schmelzpunkt des erhaltenen Produkts in Celsius graden. Die Reaktionsdauer war stets 1 Stunde.
Bei Beispiel 14 wurde Collidin und bei Beispiel 15 Chinolin statt Pyridin als tertiäre stickstoffhaltige Base verwendet.
EMI0002.0092
Beispiel <SEP> CuCN <SEP> KCN/NaCN <SEP> Pyridin <SEP> Reaktionstemperatur <SEP> Ausbeute <SEP> Schmelzpunkt
<tb> (gimol) <SEP> glmol <SEP> (g/Mol) <SEP> ( <SEP> C) <SEP> (%) <SEP> ( <SEP> C)
<tb> 2 <SEP> 0,05 <SEP> - <SEP> 0,025 <SEP> l60 <SEP> 79 <SEP> 115 <SEP> bis <SEP> 117
<tb> 3 <SEP> 0,10 <SEP> - <SEP> 0,025 <SEP> 160 <SEP> 81 <SEP> 117 <SEP> bis <SEP> l19
<tb> 4 <SEP> 0,l4 <SEP> - <SEP> 0,025 <SEP> 160 <SEP> 86 <SEP> 114 <SEP> bis <SEP> 1l7
<tb> 5 <SEP> 0,06 <SEP> 0,04 <SEP> KCN <SEP> 0,025 <SEP> 170 <SEP> 82 <SEP> 115 <SEP> bis <SEP> 118
<tb> 6 <SEP> 0,05 <SEP> 0,05 <SEP> NaCN <SEP> 0,
025 <SEP> 160 <SEP> bis <SEP> 165 <SEP> 80 <SEP> 115 <SEP> bis <SEP> 117
<tb> 7 <SEP> 0,03 <SEP> 0,07 <SEP> KCN <SEP> 0,025 <SEP> 170 <SEP> 74 <SEP> 1l4 <SEP> bis <SEP> 117
<tb> 8 <SEP> 0,10 <SEP> - <SEP> 0,006 <SEP> 160 <SEP> bis <SEP> 165 <SEP> 85 <SEP> 113 <SEP> bis <SEP> l16
<tb> 9 <SEP> 0,10 <SEP> - <SEP> 0,012 <SEP> 160 <SEP> bis <SEP> 165 <SEP> 87 <SEP> 116 <SEP> bis <SEP> l18
<tb> 10 <SEP> 0,10 <SEP> - <SEP> 0,025 <SEP> 160 <SEP> bis <SEP> 165 <SEP> 82 <SEP> 116 <SEP> bis <SEP> 118
<tb> 11 <SEP> 0,10 <SEP> - <SEP> 0,025 <SEP> 180 <SEP> 85 <SEP> 115 <SEP> bis <SEP> l17
<tb> 12 <SEP> 0,10 <SEP> - <SEP> 0,025 <SEP> 190 <SEP> 91 <SEP> 114 <SEP> bis <SEP> l16
<tb> 13 <SEP> 0,10 <SEP> - <SEP> 0,025 <SEP> 200 <SEP> 92 <SEP> 112 <SEP> bis <SEP> 116
<tb> 14 <SEP> 0,10 <SEP> - <SEP> 0,025 <SEP> 180 <SEP> 64 <SEP> 113 <SEP> bis <SEP> 1l6
<tb> 15 <SEP> 0,l0 <SEP> - <SEP> 0,
025 <SEP> 155 <SEP> bis <SEP> 160 <SEP> 48 <SEP> 1l0 <SEP> bis <SEP> 119
Process for the production of 2-chloro-6-nitro-benzonitrile The invention relates to a process for the production of 2-chloro-6-nitro-benzonitrile.
It has been found that 2-chloro-6-nitrobenzonitrile has superior properties compared to comparable, known fungicides and is therefore suitable as an active ingredient in fungicidal agents. It was found that with respect to the mold fungi Fusarium culmorum, Venturia inäqualis and Phytophthora infestans 2-chloro-6-nitro-benzonitrile is much more effective than comparable compounds. This was z.
B. found in the following comparison attempts with compounds according to a German patent, the following types of mold fungus were used: Fusarium culmorum (F)
EMI0001.0004
Checked <SEP> connections <SEP> F <SEP> V <SEP> P
<tb> <SEP> connection according to the invention:
<tb> 2-chloro-6-nitro-benzonitrile <SEP> 5.0 <SEP> 5.5 <SEP> 4.4
<tb> Connections <SEP> to <SEP> a
<tb> German <SEP> patent:
<tb> 1-Nitro-2-chlorobenzene <SEP> <3 <SEP> <3 <SEP> <3
<tb> 1 <SEP> Nitro-3-chlorobenzene <SEP> <3 <SEP> <3 <SEP> <3
<tb> 1-Nitro-4-chlorobenzene <SEP> <3 <SEP> <3 <SEP> <3
<tb> 1-Nitro-2,4-dichlorobenzene <SEP> 3 <SEP> to <SEP> 4 <SEP> 3 <SEP> to <SEP> 4 <SEP> 3 <SEP> to <SEP> 4
<tb> 1-Nitro-2,5-dichlorobenzene <SEP> <3 <SEP> <3 <SEP> <3
<tb> 1-Nitro-3,5-dichlorobenzene <SEP> 3 <SEP> to <SEP> 4 <SEP> 3 <SEP> to <SEP> 4 <SEP> 3 <SEP> to <SEP> 4
<tb> 1 <SEP> Nitro-2,3,5,6-tetrachlorobenzene <SEP> - <SEP> 4 <SEP> to <SEP> 5 <SEP> - The present patent relates to a process for the production of 2-chlorine -l-nitro-benzonitrile, the da- Venturia inäqualis (V) Phytophthora infestans (P).
The compounds to be tested were applied in a concentration series, and the concentrations were determined in each case which caused a 95% kill of the fungi. The results of the tests are given in the table below, with the numbers indicating the negative logarithm of the above-mentioned concentration. The designation 3 means that no effect was found at a concentration of 1%, and - means: no effectiveness.
It is clear from the table that the compound according to the invention is usually a hundred times more effective than the compounds according to the patent in question. is characterized in that 2,3-dichloronitrobenzene is reacted in the presence of a tertiary aromatic nitrogen base with cuprocyanide and possibly also with an alkali metal cyanide.
The implementation is z. B. carried out at a temperature between 140 and 240'C and especially between 160 and 200C.
Suitable tertiary nitrogen bases are: pyridine or pyridines substituted by alkyl groups, e.g. B. collidine, picoline or lutidine, and further quinoline. Pyridine is preferred. The amount of the tertiary base is e.g. B. chosen such that less than about 0.5 moles and preferably 0.05 to 0.3 moles per mole of 2,3-dichloronitrobenzene are used.
If only cuprocyanide is used as the cyanide, equimolar amounts are preferably used with regard to 2,3-dichloronitrobenzene. The use of larger amounts is no better yield of 2-chloro-6-nitro-benzonitrile, based on the 2,3-dichlorobenzonitrile used. Cuprocyanide can advantageously up to .about 70 mol percent through an alkali cyanide,
preferably sodium or potassium cyanide are replaced.
The method is based on Example 1 and the examples summarized in the table, which were carried out analogously to Example 1, explained.
<I> Example </I> 960 g (5 g mol) 2,3-dichloronitrobenzene were heated to 165.degree. A mixture of 447 g of cuprocyanide and 50 cm of pyridine was added in portions and with stirring over a period of 31/2 hours. During 30 minutes after the addition, the temperature of the reaction mixture was kept between 165 and 170.degree. The reaction was exothermic. The reaction mixture was poured into 2.5 liters of warm chloroform.
The insoluble copper salts formed a coarse-grained precipitate after a few minutes. This was filtered off with suction, powdered and extracted with benzene. The resulting washing liquid was mixed with the chloroform solution, washed successively twice with 250 cm3 of concentrated hydrochloric acid (specific gravity 1.19) and three times with 500 cm3 of water, and then evaporated.
The residue (865 g) was extracted five times with 500 cm3 of petroleum ether (boiling point range 40 to 60 ° C.). The 2-chloro-6-nitro-benzonitrile, which was not soluble in petroleum ether, had a weight of 681 g (75 @) and a melting point of 117 to 119 C. 184 g of unchanged 2,3-dichloronitrobenzene could be recovered from the petroleum ether.
Overall, a yield of 93 ö 2-chloro-6-nitrobenzonitrile was obtained.
In the examples given in the table, 0.1 g / mol of 2,3-dichloronitrobenzene was used as the starting material. The following are mentioned in the columns of this table:
the number of the example, the amounts of cuprocyanide, potassium cyanide or sodium cyanide and pyridine (in g / mol), the reaction temperature in degrees Celsius, the yield of 2-chloro-6-nitrobenzonitrile in percent of the 2,3- Dichloronitrobenzene and the melting point of the product obtained in degrees Celsius. The reaction time was always 1 hour.
In Example 14, collidine was used and in Example 15, quinoline was used as the tertiary nitrogen-containing base instead of pyridine.
EMI0002.0092
Example <SEP> CuCN <SEP> KCN / NaCN <SEP> pyridine <SEP> reaction temperature <SEP> yield <SEP> melting point
<tb> (gimol) <SEP> glmol <SEP> (g / mol) <SEP> (<SEP> C) <SEP> (%) <SEP> (<SEP> C)
<tb> 2 <SEP> 0.05 <SEP> - <SEP> 0.025 <SEP> l60 <SEP> 79 <SEP> 115 <SEP> to <SEP> 117
<tb> 3 <SEP> 0.10 <SEP> - <SEP> 0.025 <SEP> 160 <SEP> 81 <SEP> 117 <SEP> to <SEP> l19
<tb> 4 <SEP> 0, l4 <SEP> - <SEP> 0.025 <SEP> 160 <SEP> 86 <SEP> 114 <SEP> to <SEP> 1l7
<tb> 5 <SEP> 0.06 <SEP> 0.04 <SEP> KCN <SEP> 0.025 <SEP> 170 <SEP> 82 <SEP> 115 <SEP> to <SEP> 118
<tb> 6 <SEP> 0.05 <SEP> 0.05 <SEP> NaCN <SEP> 0,
025 <SEP> 160 <SEP> to <SEP> 165 <SEP> 80 <SEP> 115 <SEP> to <SEP> 117
<tb> 7 <SEP> 0.03 <SEP> 0.07 <SEP> KCN <SEP> 0.025 <SEP> 170 <SEP> 74 <SEP> 1l4 <SEP> to <SEP> 117
<tb> 8 <SEP> 0.10 <SEP> - <SEP> 0.006 <SEP> 160 <SEP> to <SEP> 165 <SEP> 85 <SEP> 113 <SEP> to <SEP> l16
<tb> 9 <SEP> 0.10 <SEP> - <SEP> 0.012 <SEP> 160 <SEP> to <SEP> 165 <SEP> 87 <SEP> 116 <SEP> to <SEP> l18
<tb> 10 <SEP> 0.10 <SEP> - <SEP> 0.025 <SEP> 160 <SEP> to <SEP> 165 <SEP> 82 <SEP> 116 <SEP> to <SEP> 118
<tb> 11 <SEP> 0.10 <SEP> - <SEP> 0.025 <SEP> 180 <SEP> 85 <SEP> 115 <SEP> to <SEP> l17
<tb> 12 <SEP> 0.10 <SEP> - <SEP> 0.025 <SEP> 190 <SEP> 91 <SEP> 114 <SEP> to <SEP> l16
<tb> 13 <SEP> 0.10 <SEP> - <SEP> 0.025 <SEP> 200 <SEP> 92 <SEP> 112 <SEP> to <SEP> 116
<tb> 14 <SEP> 0.10 <SEP> - <SEP> 0.025 <SEP> 180 <SEP> 64 <SEP> 113 <SEP> to <SEP> 1l6
<tb> 15 <SEP> 0, l0 <SEP> - <SEP> 0,
025 <SEP> 155 <SEP> to <SEP> 160 <SEP> 48 <SEP> 1l0 <SEP> to <SEP> 119
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL238687 | 1959-04-28 | ||
NL242085 | 1959-08-06 | ||
NL249879 | 1960-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH401024A true CH401024A (en) | 1965-10-31 |
Family
ID=27351015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH465160A CH401024A (en) | 1959-04-28 | 1960-04-25 | Process for the preparation of 2-chloro-6-nitro-benzonitrile |
Country Status (8)
Country | Link |
---|---|
US (1) | US3185725A (en) |
BE (2) | BE590258A (en) |
CH (1) | CH401024A (en) |
DE (1) | DE1143802B (en) |
DK (1) | DK105016C (en) |
ES (1) | ES257609A1 (en) |
GB (2) | GB949619A (en) |
NL (4) | NL242085A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3535365A (en) * | 1967-11-29 | 1970-10-20 | Merck & Co Inc | Preparation of 2,6-dichloro-4-methoxy-benzonitrile |
DE2960235D1 (en) * | 1978-06-12 | 1981-04-23 | Nippon Kayaku Kk | A process for the production of 2-chlorobenzonitrile derivatives |
JPS55120549A (en) * | 1979-03-09 | 1980-09-17 | Nippon Kayaku Co Ltd | Preparation of 2-chloro-6-nitrobenzonitrile |
JPS5998052A (en) * | 1982-11-26 | 1984-06-06 | Sanwa Kagaku Kenkyusho:Kk | Preparation of 4-chloro-2-nitrobenzonitrile |
JPH0625097B2 (en) * | 1988-03-19 | 1994-04-06 | 出光興産株式会社 | Method for producing aromatic nitrile |
DE19727890A1 (en) | 1997-07-01 | 1999-01-07 | Bayer Ag | Process for the preparation of 2,4,5-trifluorobenzonitrile |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1996007A (en) * | 1933-07-27 | 1935-03-26 | Du Pont | Preparation of-2-chloro-6-nitro-benzaldoxime |
US2195076A (en) * | 1936-10-24 | 1940-03-26 | Gen Aniline & Film Corp | Process of replacing halogen in cyclic halogen compounds and product thereof |
GB488642A (en) * | 1936-11-05 | 1938-07-05 | Ig Farbenindustrie Ag | A process for the replacement of halogen in cyclic halogen compounds by the cyano group |
DE843327C (en) * | 1947-03-18 | 1952-07-07 | Bayer Products Ltd | Combating diseases in potato tubers |
US2497060A (en) * | 1948-12-31 | 1950-02-14 | Gen Aniline & Film Corp | 3,5-dihalogen-2-cyanodiphenyls |
US2671798A (en) * | 1949-04-09 | 1954-03-09 | Merck & Co Inc | 2, 2-diphenyl-3-methyl-4-chlorobutyronitrile and processes for preparing the same |
US2690965A (en) * | 1953-04-29 | 1954-10-05 | Standard Oil Dev Co | Herbicidal composition |
US2744819A (en) * | 1954-10-13 | 1956-05-08 | Dow Chemical Co | Method for the control of undesired grasses |
US3006954A (en) * | 1957-12-27 | 1961-10-31 | Shell Oil Co | Urea and thiourea compounds |
US3012058A (en) * | 1958-05-15 | 1961-12-05 | Pennsalt Chemicals Corp | Nitrile compounds |
US3009942A (en) * | 1958-07-02 | 1961-11-21 | Heyden Newport Chemical Corp | Production of trichlorobenzoic acids |
US2999046A (en) * | 1958-08-25 | 1961-09-05 | Diamond Alkali Co | Method of destroying fungi and nematodes employing 2, 2'-(p-xylene)-bis-[2-thiopseudourea] dihydrochloride |
-
0
- NL NL104318D patent/NL104318C/xx active
- BE BE590254D patent/BE590254A/xx unknown
- BE BE590258D patent/BE590258A/xx unknown
- NL NL108786D patent/NL108786C/xx active
- NL NL238687D patent/NL238687A/xx unknown
- NL NL242085D patent/NL242085A/xx unknown
-
1960
- 1960-04-25 CH CH465160A patent/CH401024A/en unknown
- 1960-04-25 ES ES0257609A patent/ES257609A1/en not_active Expired
- 1960-04-26 DK DK161360AA patent/DK105016C/en active
- 1960-04-26 DE DEN18228A patent/DE1143802B/en active Pending
- 1960-04-27 GB GB14772/60A patent/GB949619A/en not_active Expired
- 1960-04-27 US US24916A patent/US3185725A/en not_active Expired - Lifetime
- 1960-04-27 GB GB14775/60A patent/GB951770A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE590254A (en) | |
GB949619A (en) | 1964-02-12 |
DE1143802B (en) | 1963-02-21 |
NL108786C (en) | |
GB951770A (en) | 1964-03-11 |
NL104318C (en) | |
BE590258A (en) | |
US3185725A (en) | 1965-05-25 |
ES257609A1 (en) | 1960-09-16 |
DK105016C (en) | 1966-08-08 |
NL242085A (en) | |
NL238687A (en) |
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