Синтез та антимікробна активність 5-арокси-2,6-дигідро-1Н-піроло[3,4-d]піридазин-1-онів
Aim. To develop an effective method for the synthesis of 5-aroxy-2,6-dihydro-1Н-pyrrolo[3,4-d]pyridazine-1-ones as promising objects to be investigated in the context of their antimicrobial activity.Results and discussion. It has been found that ethyl 4-formyl-5-chloro-1Н-pyrrole-3-carboxylates can...
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| Datum: | 2019 |
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| Hauptverfasser: | , , , , , |
| Format: | Artikel |
| Sprache: | Ukrainian |
| Veröffentlicht: |
National University of Pharmacy
2019
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| Schlagworte: | |
| Online Zugang: | https://ophcj.nuph.edu.ua/article/view/ophcj.19.970 |
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| Назва журналу: | Journal of Organic and Pharmaceutical Chemistry |
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Journal of Organic and Pharmaceutical Chemistry| Zusammenfassung: | Aim. To develop an effective method for the synthesis of 5-aroxy-2,6-dihydro-1Н-pyrrolo[3,4-d]pyridazine-1-ones as promising objects to be investigated in the context of their antimicrobial activity.Results and discussion. It has been found that ethyl 4-formyl-5-chloro-1Н-pyrrole-3-carboxylates can be used as convenient source substrates for building 5-aroxy-2,6-dihydro-1Н-pyrrolo[3,4-d]pyridazine-1-one systems. MBsC (MFsC) and MBcC (MFcC) of the pyrrolo[3,4-d]pyridazine-1-ones synthesized were within the rangeof 31.25-125 μg/ml.Experimental part. The two-stage synthesis of 5-aroxy-2,6-dihydro-1Н-pyrrolo[3,4-d]pyridazine-1-ones was performed. The chemical composition and the structure of the compounds synthesized were confirmed by chromatography-mass spectra, IR- and NMR 1Н (13С) spectra. The screening of the antimicrobial activity using the micromethod of the double series dilutions in the liquid nutrient medium allowed identifying compounds with a moderate activity.Conclusions. A preparative convenient synthesis of 5-aroxy-2,6-dihydro-1Н-pyrrolo[3,4-d]pyridazine-1-ones has been developed. This method assumes the nucleophilic substitution of the chlorine atom in ethyl 4-formyl-5-chloro-1Н-pyrrole-3-carboxilates with an aroxyl fragment followed by the subsequent pyridazinoanelination ofethyl 5-aroxy-4-formyl-1Н-pyrrole-3-carboxylates by hydrazine hydrate. The results of the antimicrobial activity of the substances synthesized substantiate the feasibility of further in-depth studies in this area. |
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