Синтез 2,5-діоксаспіро[3.4]октанових будівельних блоків як тривимірних спіроциклічних аналогів 1,4-діоксанів
A ring-closing metathesis (RCM) strategy was employed for the synthesis of spirooxetane compounds with a tetrahydrofuran (THF) core. The approach proposed relied on the preparation of an unsaturated spirooxetane from vinyl oxetanol. The reaction sequence involved the NaH-mediated О-alkylation with m...
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| Дата: | 2025 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
National University of Pharmacy
2025
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| Теми: | |
| Онлайн доступ: | https://ophcj.nuph.edu.ua/article/view/324901 |
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| Назва журналу: | Journal of Organic and Pharmaceutical Chemistry |
Репозитарії
Journal of Organic and Pharmaceutical Chemistry| Резюме: | A ring-closing metathesis (RCM) strategy was employed for the synthesis of spirooxetane compounds with a tetrahydrofuran (THF) core. The approach proposed relied on the preparation of an unsaturated spirooxetane from vinyl oxetanol. The reaction sequence involved the NaH-mediated О-alkylation with methyl 2-(bromomethyl)acrylate in the presence of TBAI. The subsequent RCM reaction using the Grubbs’ II catalyst gave the dihydrofuran carboxylate with a yield of 70 %. The hydrogenation under high-pressure conditions using a Pearlman’s catalyst made it possible to obtain the saturated THF-derived carboxylate, which was then subjected to alkaline hydrolysis to give a stable lithium carboxylate. The corresponding alcohol obtained via LiAlH4-mediated reduction of the ester was oxidized to the corresponding aldehyde using DMP. The alcohol was further converted into a mesylate serving as a precursor for the corresponding amine and bromide. The set of dioxane analogs proposed can serve as promising building blocks readily available on a multigram scale for the scientific community. |
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