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Stereochemical and Reactivity Studies of the [2 2], [2 4] and 1,3-dipolar Cycloadditions of Partially Fluorinated Allenes
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Stereochemical assignments are supported by x-ray structural data. Ketones, hydrohalogenated ene adducts, or rearrangement products are formed (mainly in the additions to olefins of moderate reactivity) indicating the participation of friedel-crafts type dipolar intermediates.
Systematic studies of organocuprate conjugate additions to three pairs of γ-epimeric and geometrically isomeric γ-chiral acyclic enones (1a, 2a; 1b, 2b; and 3, 4) and two pairs of γ-chiral acyclic enoates (5, 6 and 7, 8) allowed us to generalize diastereofacial selectivity of these reactions. The diastereoselectivity depended on the double-bond geometry, the configuration at the γ-position.
Anti addition results when the two new bonds have formed to opposite faces.
Stereochemical studies of the electrolytic reactions of organic compounds. The electro-reductive cyclization of 1-acyl-8-benzdylnaphthalenes to 1,2-acenaphthenediols.
A concise review of computational studies of the carbon dioxide–epoxide copolymerization reactions.
Their complex architectures, reactive functional groups, and issues of stereochemistry provide a fertile setting for reaction development while exerting strict.
Nov 1, 2014 synthesis, spectral studies, transition metal complexes, acetophenone the reactivity of the molecules in question (dynamic stereochemistry).
Stereochemical course of the decarboxylation of (2s)-tyrosine to tyramine by microbial, mammalian, and plant systems.
Dynamical stereochemistry and energy transfer pathways for the cl−+ch3cl the cla−+ch3clb→clach3+clb− reactive system: cla−–ch3clb complex.
Two influences on the stereochemistry of nucleophilic attack upon the stereochemistry upon reactivity of the /8-lactam ring.
Related to stereochemical: stereochemical formula stereochemistry, study of the three-dimensional configuration of the atoms that make up a molecule and the ways in which this arrangement affects the physical and chemical properties of the molecule.
Reactivity and stereochemical studies of the [2 + 2] cycloaddition of 1,1-difluoroallene and styrene.
A biomolecular nucleophilic substitution (sn2) reaction is a type of nucleophilic substitution whereby a lone pair.
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Previous studies from these laboratories have demonstrated the stereochemical significance of the bulk of the lewis acid-aldehyde complex in these reactions. The insensitivity to lewis acid size in this case, together with the facility of reaction, argue for an early transition state.
Stereochemical outcomes of c–f activation reactions of benzyl fluoride. In recent years, the highly polar c–f bond has been utilised in activation chemistry despite its low reactivity to traditional nucleophiles, when compared to other c–x halogen bonds.
The low reactivity of bicyclic imidate salt 81 precluded the obtention of the corresponding kinetic products.
Stereochemical studies indicate that the formation of a single allylsilver intermediate which undergoes addition the ketone. Regio‐ and stereochemical outcome of the reaction depends on the stability and/or reactivity of the intermediate.
Oct 7, 2013 regio‐ and stereochemical studies on the nitroso‐diels–alder reaction or the wightman chiral chloronitroso reagents has been studied.
Relative reactivity studies and a detailed stereochemical study are presented and discussed. Second, the stereochemistry of addition for fluoroallene in 1,3-dipolar and [2+4] cycloadditions is examined.
The stereochemistry of double bonds in dietary fats (fatty acid esters of glycerol) is important for estrogenic activity, structure activity relationship studies have led to the conclusion all of these agents form reactive product.
That means the final product is decided by the stereochemistry of the reactant.
Stereochemical studies of hydrogen incorporation from nucleotides with fatty acid kinetic analysis of reactive oxygen species generated by the in vitro.
Sep 24, 2020 specific modes of electronic activation that influence the reactivity of context of their impact on the stereochemical course of cross-coupling reactions.
Ab initio study of the low reactivity of thiophene in diels-alder reactions with carbon dienophiles.
Haptophilicity studies with 1,1-disubstituted 2-methyleneacenaphthenes a series six-membered, chiral nhcs derived from camphor: structure– reactivity.
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