Reactions are reported of the oxirane ring of 3- O-(2,3-epoxypropyl)-1,2:5,6-di- O-isopropylidene-伪- d-glucofuranose with water, primary and secondary alcohols, lithium aluminum hydride, ammonia, primary and secondary amines, and dipotassium hydrogen phosphate. In most reactions, the ...
Synthesis of New Quinoxalines Containing an Oxirane Ring by the TDAE Strategy and in Vitro Evaluation in Neuroblastoma Cell Lines research-articleAuthor(s): Marc Montana 1 , Florian Correard 2 , 3 , Omar Khoumeri 1 , Marie-Anne Esteve 2 , 3 , Thierry Terme 1 , Patrice Vanelle 1 , *...
The two epimers (−)-1a and (−)-1b of the macrocyclic lactam alkaloid 3-hydroxycelacinnine with the (2R,3R) and (2R,3S) absolute configurations, respectively, were synthesized by an alternative route involving macrocyclization with the regio- and stereoselective oxirane-ring opening by ...
The two epimers (−)-1a and (−)-1b of the macrocyclic lactam alkaloid 3-hydroxycelacinnine with the (2R,3R) and (2R,3S) absolute configurations, respectively, were synthesized by an alternative route involving macrocyclization with the regio- and stereoselective oxirane-ring opening by ...
While the Walsh orbital scheme is convenient computationally and visually, the theory of atoms in molecules [34] provides a more quantitative approach for the oxirane ring. From the p-cbd model, one can see that, for the dative donation, there is a charge build-up along the C2 axis of ...
Dip. Chim. Org. Ind.Michele PensoDip. Chim. Org. Ind.ChemInformLupi V., Albanese D., Landini D., Scaletti D., and Penso M. Synthesis of 2,6-disubstituted morpholines through regioselective oxiranes ring opening by tosylamide under PTC conditions. Tetrahedron, 60: 11709-11718 (2004)....
It’s Simple? Yes An epoxide is a molecule with a tiny 3-member ring in its structure. One atom is oxygen. Two are carbon. The epoxy link is illustrated in Figure 1.R₁,R₂,R₃, andR₄arependantgroups. How is such a 3-member ring created? Often by the oxidation of an alk...
The difference of the reactivity for SN2 type oxirane ring opening of exo and endo Aflatoxin B1 (AFB1)8, 9-oxide (exo-1 and endo-1, respectively) was analyzed with ab initio molecular orbital theory. All stationary points including transition-state structures were optimized with no geometry con...
Chiral β-hydroxy-α-amino acids such as <SPAN style="FONT-STYLE: italic">erythro</SPAN>-β-hydroxy-L-aspartic acid and erythro-β-hydroxymethyl-L-serine derivatives have been synthesized in optically pure form from L- and D-tartaric acids through a novel oxirane ring-opening reaction and a...
西班牙文 oxirane在西班牙文中 oxirane 名词 en (organic chemistry) A three-membered heterocycle having two carbon atoms and one oxygen atom; ethylene oxide 字典中的翻译英文 - 西班牙文 epoxietano 细节 Termium oxirono 细节 Termium óxido de etileno ...