BE626560A - - Google Patents
Info
- Publication number
- BE626560A BE626560A BE626560DA BE626560A BE 626560 A BE626560 A BE 626560A BE 626560D A BE626560D A BE 626560DA BE 626560 A BE626560 A BE 626560A
- Authority
- BE
- Belgium
- Prior art keywords
- formate
- product
- methylene chloride
- filter
- process according
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 8
- WQDUMFSSJAZKTM-UHFFFAOYSA-N sodium methoxide Chemical group [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- ABJKIHHNDMEBNA-UHFFFAOYSA-N 3-methylchromen-4-one Chemical compound C1=CC=C2C(=O)C(C)=COC2=C1 ABJKIHHNDMEBNA-UHFFFAOYSA-N 0.000 claims description 3
- -1 alkyl formate Chemical compound 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000005712 crystallization Effects 0.000 claims description 2
- 230000001264 neutralization Effects 0.000 claims description 2
- YMWUJEATGCHHMB-UHFFFAOYSA-N methylene dichloride Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims 4
- 239000000284 extract Substances 0.000 claims 3
- BDAGIHXWWSANSR-UHFFFAOYSA-M methanoate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 claims 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims 2
- 239000003507 refrigerant Substances 0.000 claims 2
- 238000005406 washing Methods 0.000 claims 2
- 239000003643 water by type Substances 0.000 claims 2
- 150000008431 aliphatic amides Chemical class 0.000 claims 1
- 230000001174 ascending Effects 0.000 claims 1
- 238000009835 boiling Methods 0.000 claims 1
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 229950009263 methylchromone Drugs 0.000 claims 1
- 238000009987 spinning Methods 0.000 claims 1
- 235000013311 vegetables Nutrition 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 10
- KDUWXMIHHIVXER-UHFFFAOYSA-N 1-(2-hydroxyphenyl)propan-1-one Chemical compound CCC(=O)C1=CC=CC=C1O KDUWXMIHHIVXER-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- TZIHFWKZFHZASV-UHFFFAOYSA-N Methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N DMA Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- 241001417524 Pomacanthidae Species 0.000 description 1
- QDRKDTQENPPHOJ-UHFFFAOYSA-N Sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000003218 coronary vasodilator agent Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- ROSDSFDQCJNGOL-UHFFFAOYSA-N dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012442 inert solvent Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic 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
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/22—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
<Desc/Clms Page number 1>
"Nouveau procédé de préparation de la 3-méthyl chromone et produit obtenu"*
L'objet de la présente invention est un nouveau procédé de préparation de la 3-méthyl chromons compose utili- sé en thérapeutique comme vasodilatateur coronarien, et répon- dant à la formule
<Desc/Clms Page number 2>
EMI2.1
Ce produit était préparé jusqu'ici soit par action . du formiate d'éthyle sur l'o-hydroxypropiophénone en présence ' de sodium métal, soit encore, comme il a été montré dans le brevet belge n 591. 545 xx x xxxxxxx xxxxx, en utilisant comme agent de condensation la solution d'un halogénure d'alcoylzine dans le diméthyl formamide.
Selon Ch, MENTZER (Bull. Soc. Chim., 1955, 1083), le premier de ces procédés présente des inconvénients industriels car il nécessite l'emploi de quantités importantes de sodium métal dont l'utilisation n'est pas sana danger. Quant au second procédé sus mentionné, il n'utilise pas un réactifcommercial et la durée de la réaction est relativement longue.
Il a été trouvé maintenant, et c'est ce qui fait 1' objet de la présente invention, que la condensation du formiate de méthyle ou d'un autre formiate d'alcoyle inférieur sur l'o- ' hydroxypropiophénone s'effectue très aisément en présence d' un alcoolate alcalin, solide, du. commerce et d'un amide d'acide aliphatique inférieur disubstitué comme le diméthylformamide ou le diméthylacétamide en absence ou présence d'un tiers solvant neutre. La réaction progresse rapidement à basse température et ne nécessite aucun chauffage. Pour l'exécution du procédé de l'invention, il est particulièrement avantageux d'utiliser l'alcoolate alcalin en excès, de préférence au moins le double de la quantité stoechiométrique.
Selon un mode d'exécution préférentiel, on utilise comme alcoolate alcalin le méthylate de sodium solide du com- merce en présence de diméthylformamide et ajoute à la suspen- sion ainsi obtenue d'abord l'o-hydroxypropiophénone qui passe
<Desc/Clms Page number 3>
ainsi à la forme énolique, puis le formiate de méthyle, . La réaction est' exothermique et se termine à la température ordinaire. Le rendement global en produit pur avoisine 90 %.
L'exemple suivant illustre l'invention sans toute- fois la limiter. On peut notamment utiliser le diméthylacéta- mise à la place du diméthylformamide et opérer en présence d' un solvant inerte comme le benzène, le toluène ou l'éther de pétrole, sans s'éloigner pour cela du cadre de l'invention, ou encore utiliser l'éthylate de sodium au lieu du méthylate.
EXEMPLE
Sous courant d'azote et agitation mécanique, en re- froidissant extérieurement par un bain de glace, on ajoute à
216 gr de méthylate de sodium seo, 750 cm3 de diméthylforma- mide puis introduit 250 gr d'o-hydroxypropiophénone en vingt minutes de façon que la température du mélange réactionnel se maintienne à 20 0 environ. Des vapeurs de diméthylamine- ''' s'échappent pur le réfrigérant descendant et le méthylate de sodium se dissout presque intégralement au fur et à mesure de l'introduction de l'o-hydroxypropiophénone en même temps ' que le milieu réactionnel vire du jaune à l'orangé.
Après l'introduction de l'o-hydroxypropiophénone, on maintient en- core un quart d'heure à 30 minutes à 20 C et refroidit snsuite à -5 c. On constate après refroidissement une cristallisation abondante et, sans interrompre l'agitation ni le courant dt azote, on introduit 250 om3 de formiate de méthyle de façon que la température ne- dépasse pas -1 ce qui demande environ
3/4 d'heure. L'introduction terminée, on laisse d'abord remon- ter la température entre 0 et 5 C puis enlève le bain réfrigé- rant Le mélange atteint la température ambiante à laquelle on le maintient une heure.
On acidifie sous refroidissement acétique mé. ange extérieur par addition de-500 om3 d'acide/puis porte le mélange
<Desc/Clms Page number 4>
<Desc / Clms Page number 1>
"New process for the preparation of 3-methyl chromone and product obtained" *
The object of the present invention is a new process for the preparation of the 3-methyl chromons compound used in therapy as a coronary vasodilator, and corresponding to the formula
<Desc / Clms Page number 2>
EMI2.1
This product has so far been prepared either by action. ethyl formate on o-hydroxypropiophenone in the presence of sodium metal, or again, as has been shown in Belgian patent No. 591. 545 xx x xxxxxxx xxxxx, using as condensing agent the solution of a alkylzine halide in dimethyl formamide.
According to Ch, MENTZER (Bull. Soc. Chim., 1955, 1083), the first of these processes has industrial drawbacks because it requires the use of large quantities of sodium metal, the use of which is not without danger. As for the second process mentioned above, it does not use a commercial reagent and the reaction time is relatively long.
It has now been found, and this is the object of the present invention, that the condensation of methyl formate or other lower alkyl formate with o-hydroxypropiophenone proceeds very easily. in the presence of a solid alkaline alcoholate of. trade and a disubstituted lower aliphatic acid amide such as dimethylformamide or dimethylacetamide in the absence or presence of a neutral third solvent. The reaction proceeds rapidly at low temperature and does not require heating. For carrying out the process of the invention, it is particularly advantageous to use the alkali alcoholate in excess, preferably at least twice the stoichiometric amount.
According to a preferred embodiment, solid sodium methoxide commercially available in the presence of dimethylformamide is used as alkali alkoxide and the o-hydroxypropiophenone which passes through the suspension is added to the suspension thus obtained.
<Desc / Clms Page number 3>
thus in the enolic form, then methyl formate,. The reaction is exothermic and ends at room temperature. The overall yield of pure product is around 90%.
The following example illustrates the invention without, however, limiting it. It is in particular possible to use dimethylacetalization in place of dimethylformamide and to operate in the presence of an inert solvent such as benzene, toluene or petroleum ether, without departing for this from the scope of the invention, or alternatively. use sodium ethoxide instead of methylate.
EXAMPLE
Under a stream of nitrogen and mechanical stirring, while cooling the outside with an ice bath, the mixture is added to
216 g of sodium methoxide seo, 750 cm3 of dimethylformamide then introduced 250 g of o-hydroxypropiophenone in twenty minutes so that the temperature of the reaction mixture is maintained at approximately 20 0. Vapors of dimethylamine- '' 'escape pure the descending condenser and the sodium methoxide dissolves almost completely as the introduction of o-hydroxypropiophenone at the same time' as the reaction medium turns yellow. orange.
After the introduction of the o-hydroxypropiophenone, it is still maintained for a quarter of an hour at 30 minutes at 20 ° C. and then cooled to -5 ° C. After cooling, abundant crystallization is observed and, without interrupting the stirring or the flow of nitrogen, 250 om 3 of methyl formate are introduced so that the temperature does not exceed -1 which requires approximately
3/4 of an hour. When the introduction is complete, the temperature is first allowed to rise to between 0 and 5 ° C. and then the cooling bath is removed. The mixture reaches ambient temperature at which it is maintained for one hour.
Acidified under acetic cooling. outer angel by addition of -500 om3 acid / then bring the mixture
<Desc / Clms Page number 4>
Claims (1)
Publications (1)
Publication Number | Publication Date |
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BE626560A true BE626560A (en) |
Family
ID=197298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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BE626560D BE626560A (en) |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE626560A (en) |
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0
- BE BE626560D patent/BE626560A/fr unknown
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