Unusually Stable Isoxazolidinyl Epoxides: Synthesis and Reactivity in Nucleophilic Substitutions
| Autoři | |
|---|---|
| Rok publikování | 2016 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | European Journal of Organic Chemistry |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | http://onlinelibrary.wiley.com/doi/10.1002/ejoc.201600471/abstract;jsessionid=7A316B02D70DA68F1146CBD0E83FD9BA.f04t03?systemMessage=Pay+per+view+article+purchase%28PPV%29+on+Wiley+Online+Library+will+be+unavailable+on+Saturday+11th+March+from+05%3A00-14% |
| Doi | http://dx.doi.org/10.1002/ejoc.201600471 |
| Obor | Organická chemie |
| Klíčová slova | Heterocycles; Epoxides; Ring opening; Nucleophilic substitution; Oxidation; Diastereoselectivity |
| Popis | The synthesis of new N-carbamoyl-substituted isoxazolidine-4,5-diols and their 4,5-anhydro analogues, isoxazolidinyl epoxides, is described. The 4,5-unsubstituted 2,3-dihydroisoxazole starting materials reacted directly with potassium osmate/4-methylmorpholine N-oxide and 3,3-dimethyldioxirane, respectively. All addition reactions proceeded with excellent anti selectivity with respect to the substituent at C-3. The obtained isoxazolidinyl epoxides as well as benzoylated isoxazolidine-4,5-diols were subjected to nucleophilic substitution reactions with various nucleophiles. 4-Hydroxyisoxazolidines with chlorine, methoxy, and azide substituents bound to C-5 were prepared in moderate to good yields. In terms of chemical stability, the discussed isoxazolidinyl epoxides can be isolated and stored for a long time. |
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