Зручний підхід до синтезу нових 4-амінозаміщених похідних піридо[2,3-d]піримідин-7-ону
This paper is devoted to development of a convenient approach to the synthesis of new pyrido[2,3-d]pyrimidin-7-one derivatives that contain alkylamino groups at position 4 of the heterocycle. The interaction of 4,6-dichloropyrimidine-5-carbaldehyde with (2-ethoxy-2-oxoethyl) triphenylphosphonium bro...
Збережено в:
| Дата: | 2016 |
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| Автори: | , , , |
| Формат: | Стаття |
| Мова: | Ukrainian |
| Опубліковано: |
National University of Pharmacy
2016
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| Теми: | |
| Онлайн доступ: | https://ophcj.nuph.edu.ua/article/view/ophcj.16.906 |
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| Назва журналу: | Journal of Organic and Pharmaceutical Chemistry |
Репозитарії
Journal of Organic and Pharmaceutical Chemistry| Резюме: | This paper is devoted to development of a convenient approach to the synthesis of new pyrido[2,3-d]pyrimidin-7-one derivatives that contain alkylamino groups at position 4 of the heterocycle. The interaction of 4,6-dichloropyrimidine-5-carbaldehyde with (2-ethoxy-2-oxoethyl) triphenylphosphonium bromide in ethanol in the presence of triethylamine leads to formation of ethyl (2E)-3-(4,6-dichloropyrimidin-5-yl)acrylate. Heat treatment of 6-amino substituted pyrimidinylacrylate derivatives with sodium methylate leads to the intramolecular cyclization and replacement of the chlorine atom with the methoxy group forming 4-methoxypyrido[2,3-d]pyrimidin-7-ones. In order to introduce various nitrogen-containing substituents at position 4 of the heterocyclic system the aforementioned compounds were converted into 4-chloropyrido[2,3-d]pyrimidin-7-one derivatives using phosphorus oxychloride. The effective method has been developed for the synthesis of a series of amino substituted pyrido[2,3-d]pyrimidin-7-one by a direct reaction of ethyl (2E)-(4-chloro-6-aminopyrimidin-5-yl)acrylate with the secondary amines in the presence of triethylamine. Then ethyl acrylate formed was treated by heating with sodium methylate in methanol. Sulphur-containing derivatives of pyrido[2,3-d]pyrimidin-7-one were also synthesized. These derivatives were used to obtain pyrido[2,3-d]pyrimidin-7-ones containing the secondary amines at position 4 of the heterocyclic system. The structure of the compounds obtained has been proven using NMR-spectroscopy, mass-spectra and elemental analysis |
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