BE824491R - PROCESS FOR PREPARING 1,8-NAPHTHYRIDINE DERIVATIVES - Google Patents

PROCESS FOR PREPARING 1,8-NAPHTHYRIDINE DERIVATIVES

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Publication number
BE824491R
BE824491R BE152463A BE152463A BE824491R BE 824491 R BE824491 R BE 824491R BE 152463 A BE152463 A BE 152463A BE 152463 A BE152463 A BE 152463A BE 824491 R BE824491 R BE 824491R
Authority
BE
Belgium
Prior art keywords
emi
naphthyridine
oxo
propionyl
preparing
Prior art date
Application number
BE152463A
Other languages
French (fr)
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 filed Critical
Priority to BE152463A priority Critical patent/BE824491R/en
Application granted granted Critical
Publication of BE824491R publication Critical patent/BE824491R/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D471/00Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/04Ortho-condensed systems

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

Description

       

  Procédé de préparation de dérivés de 1,8-naphthyridine.

  
Dans le brevet principal a été décrit un procé= dé pour la préparation de dérivés de 1,8-naphthyridine.

  
L'expérience a montré que d'une manière

  
 <EMI ID=1.1> 

  
cipal sont nouveaux et avantageux.

  
La présente addition a pour but de définir ces composés et de mettre spécifiquement sous protection certains d'entre eux.

  
Ces composés se distinguent comme suit : 

  
 <EMI ID=2.1> 

  
drogène ou un alcoyle, avec comme autre condition qu'au 

  
 <EMI ID=3.1> 

  
 <EMI ID=4.1> 

  
 <EMI ID=5.1> 

  
 <EMI ID=6.1> 

  
 <EMI ID=7.1> 

  
férence acétyle, propionyle ou butyryle ou un alcanoyle  inférieur substitué tel que phénacétyle, cyclohexylacétyle,  bête-phényl-propionyle ou bêta-cyclohexyl-propionyle.

  
 <EMI ID=8.1> 

  
 <EMI ID=9.1> 

Exemple 1

  
On ajoute 0,5 g de 6-acétamido-4-oxo-4H- 

  
 <EMI ID=10.1> 

  
eutectique de diphyle et d'oxyde de diphényle) à 250[deg.]C. 

  
On agite le mélange de réaction à cette température pendant 20 minutes, après quoi on le refroidit à la température ordinaire. On sépare par filtration les cristaux précipités et on les lave avec de l'éther de pétrole. On obtient

  
 <EMI ID=11.1> 

  
 <EMI ID=12.1> 

Exemple 2

  
On ajoute 0,5 g de 6-hydroxy-4-oxo-4H-pyrido

  
 <EMI ID=13.1> 

  
à 350[deg.]C. On agite le mélange de réaction à cette température pendant 10 minutes, après quoi on le refroidit à la température ordinaire et on le dilue avec 25 ml d'éther de pétrole. On sépare par filtration les cristaux précipités et on les lave à l'éther de pétrole. On obtient ainsi 0,2 g de 7-hydroxy-4-oxo-l,4-dihydro-l,8-naphtyridine. Après recristallisation à partir de diméthylformamide le point de fusion s'élève à plus de 360[deg.]C.

  
 <EMI ID=14.1> 

  
trouvé : 58,95 4,00 16,81.

  
Comme décrit dans le procédé ci-dessus, au

  
 <EMI ID=15.1> 

  
On exécute le procédé ci-dessus, sauf que la durée de réaction est de 15 minutes. A partir de

  
 <EMI ID=16.1>   <EMI ID=17.1> 

  
pyrimidine à 325[deg.]C pendant 30 minutes. On obtient ainsi de la 3-éthyl-7-méthyl-4-oxo-l, 4-dihydro-l, 8-naphtyridine

  
 <EMI ID=18.1> 

Exemple 3

  
On ajoute 0,5 g de 2-(l-pipéridyl)-6-méthyl-

  
 <EMI ID=19.1> 

  
fine chauffée à 350[deg.]C. On agite le mélange de réaction pendant 10 minutes à cette température, après quoi on refroidit à la température ordinaire, on dilue la solution brun foncé avec 25 ml d'éther de pétrole, on sépare par filtration les cristaux précipités et on les lave avec de l'éther de pétrole. On obtient 0,4 g de 2-(l-pipéridyl)-7-

  
 <EMI ID=20.1> 

  
On ajoute les cristaux ainsi obtenus à 1,5 ml d'éthanol contenant 10% d'acide chlorhydrique. On recristallise le chlorhydrate précipité à partir de méthanol, puis on met la

  
 <EMI ID=21.1> 

  
 <EMI ID=22.1> 

  
 <EMI ID=23.1> 

  
Comme décrit dans le procédé ci-dessus, au

  
 <EMI ID=24.1> 

  
1,8-naphtyridine avec un rendement de 40%. 

  
Comme décrit dans le procédé ci-dessus,

  
du : 

  
3-éthoxycarbonyl-6-éthyl-4-oxo-4h-pyrido

  
 <EMI ID=25.1> 

  
le

  
3-éthoxycarbonyl-7-éthyl 4-oxo-1,4-dihydro1,8-naphthyridine.

  
D'autre part, également comme décrit :
du :

  
3-éthoxy-carbonyl-6,8-diméthyl-4-oxo-4h-

  
 <EMI ID=26.1> 

  
de 60 %:

  
le : 

  
3-éthoxycarbonyl 1-5, 7-diméthyl-4-oxo-1,4dihydro-1,8 naphtyridine.

REVENDICATIONS

  
 <EMI ID=27.1> 

  
senter de l'hydrogène ou un alcoyle, avec comme autre

  
 <EMI ID=28.1> 

  
autre chose que de l'hydrogène, ainsi qu'avec la condition que si R3 est un acétamido ou un hydroxy, au moins un des

  
 <EMI ID=29.1> 



  Process for the preparation of 1,8-naphthyridine derivatives.

  
In the main patent has been described a process for the preparation of 1,8-naphthyridine derivatives.

  
Experience has shown that in a way

  
 <EMI ID = 1.1>

  
cipal are new and advantageous.

  
The purpose of this addition is to define these compounds and to specifically protect some of them.

  
These compounds are distinguished as follows:

  
 <EMI ID = 2.1>

  
drogen or an alkyl, with the condition other than

  
 <EMI ID = 3.1>

  
 <EMI ID = 4.1>

  
 <EMI ID = 5.1>

  
 <EMI ID = 6.1>

  
 <EMI ID = 7.1>

  
acetyl, propionyl or butyryl or a substituted lower alkanoyl such as phenacetyl, cyclohexylacetyl, beta-phenyl-propionyl or beta-cyclohexyl-propionyl.

  
 <EMI ID = 8.1>

  
 <EMI ID = 9.1>

Example 1

  
0.5 g of 6-acetamido-4-oxo-4H- are added

  
 <EMI ID = 10.1>

  
eutectic of diphyl and diphenyl ether) at 250 [deg.] C.

  
The reaction mixture is stirred at this temperature for 20 minutes, after which it is cooled to room temperature. The precipitated crystals are filtered off and washed with petroleum ether. We obtain

  
 <EMI ID = 11.1>

  
 <EMI ID = 12.1>

Example 2

  
0.5 g of 6-hydroxy-4-oxo-4H-pyrido is added

  
 <EMI ID = 13.1>

  
at 350 [deg.] C. The reaction mixture is stirred at this temperature for 10 minutes, after which it is cooled to room temperature and diluted with 25 ml of petroleum ether. The precipitated crystals are filtered off and washed with petroleum ether. 0.2 g of 7-hydroxy-4-oxo-1,4-dihydro-1,8-naphthyridine is thus obtained. After recrystallization from dimethylformamide the melting point rises to more than 360 [deg.] C.

  
 <EMI ID = 14.1>

  
found: 58.95 4.00 16.81.

  
As described in the process above, at

  
 <EMI ID = 15.1>

  
The above process is carried out except that the reaction time is 15 minutes. From

  
 <EMI ID = 16.1> <EMI ID = 17.1>

  
pyrimidine at 325 [deg.] C for 30 minutes. This gives 3-ethyl-7-methyl-4-oxo-l, 4-dihydro-l, 8-naphthyridine

  
 <EMI ID = 18.1>

Example 3

  
0.5 g of 2- (1-piperidyl) -6-methyl- is added

  
 <EMI ID = 19.1>

  
fine heated to 350 [deg.] C. The reaction mixture is stirred for 10 minutes at this temperature, after which it is cooled to room temperature, the dark brown solution is diluted with 25 ml of petroleum ether, the precipitated crystals are filtered off and washed with water. petroleum ether. 0.4 g of 2- (1-piperidyl) -7- is obtained.

  
 <EMI ID = 20.1>

  
The crystals thus obtained are added to 1.5 ml of ethanol containing 10% hydrochloric acid. The hydrochloride precipitated is recrystallized from methanol, then the

  
 <EMI ID = 21.1>

  
 <EMI ID = 22.1>

  
 <EMI ID = 23.1>

  
As described in the process above, at

  
 <EMI ID = 24.1>

  
1,8-naphthyridine with a yield of 40%.

  
As described in the process above,

  
of :

  
3-ethoxycarbonyl-6-ethyl-4-oxo-4h-pyrido

  
 <EMI ID = 25.1>

  
the

  
3-ethoxycarbonyl-7-ethyl 4-oxo-1,4-dihydro1,8-naphthyridine.

  
On the other hand, also as described:
of :

  
3-ethoxy-carbonyl-6,8-dimethyl-4-oxo-4h-

  
 <EMI ID = 26.1>

  
by 60%:

  
the :

  
3-ethoxycarbonyl 1-5, 7-dimethyl-4-oxo-1,4dihydro-1,8 naphthyridine.

CLAIMS

  
 <EMI ID = 27.1>

  
smell of hydrogen or an alkyl, with as other

  
 <EMI ID = 28.1>

  
other than hydrogen, as well as with the condition that if R3 is an acetamido or a hydroxy, at least one of the

  
 <EMI ID = 29.1>


    

Claims (1)

2. Composés selon la revendication 1, <EMI ID=30.1> 2. Compounds according to claim 1, <EMI ID = 30.1> sont comme défini à la revendication 1. are as defined in claim 1. 3. Composés selon la revendication 2, 3. Compounds according to claim 2, <EMI ID=31.1> <EMI ID = 31.1> préférence acétyle, propionyle ou butyryle ou un alcanoyle inférieur substitué tel que phénacétyle, cyclohexylacétyle, bêta-phényl-propionyle ou bêta-cyclohexyl-propionyle. preferably acetyl, propionyl or butyryl or a substituted lower alkanoyl such as phenacetyl, cyclohexylacetyl, beta-phenyl-propionyl or beta-cyclohexyl-propionyl. 4. En tant que composés nouveaux : 4. As new compounds: <EMI ID=32.1> <EMI ID = 32.1> 7-hydroxy-3-phényl-4-oxo-l, 4-dihydro-l, 8-naphtyridine, 3-éthyl-7-méthyl-4-oxo-l, 4-dihydro-l, 8-naphtyridine, 7-hydroxy-3-phenyl-4-oxo-l, 4-dihydro-l, 8-naphthyridine, 3-ethyl-7-methyl-4-oxo-l, 4-dihydro-l, 8-naphthyridine, <EMI ID=33.1> <EMI ID = 33.1> yridine. yridine.
BE152463A 1975-01-17 1975-01-17 PROCESS FOR PREPARING 1,8-NAPHTHYRIDINE DERIVATIVES BE824491R (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BE152463A BE824491R (en) 1975-01-17 1975-01-17 PROCESS FOR PREPARING 1,8-NAPHTHYRIDINE DERIVATIVES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE152463A BE824491R (en) 1975-01-17 1975-01-17 PROCESS FOR PREPARING 1,8-NAPHTHYRIDINE DERIVATIVES
BE824491 1975-01-17

Publications (1)

Publication Number Publication Date
BE824491R true BE824491R (en) 1975-05-15

Family

ID=25648333

Family Applications (1)

Application Number Title Priority Date Filing Date
BE152463A BE824491R (en) 1975-01-17 1975-01-17 PROCESS FOR PREPARING 1,8-NAPHTHYRIDINE DERIVATIVES

Country Status (1)

Country Link
BE (1) BE824491R (en)

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RE Patent lapsed

Owner name: CHINOIN GYOGYSZER ES VEGYESZETI TERMEKEK GYARA R.

Effective date: 19870630