Recent advances in ring transformation of five-membered heterocycles

Zobrazit minimální záznam Hejtmánková, Ludmila Sedlák, Miloš 2009-03-12T16:12:37Z 2009-03-12T16:12:37Z 2006
dc.identifier Univerzitní knihovna (studovna) cze
dc.identifier.issn 1211-5541
dc.description.abstract Ring transformations of heterocyclic rings by temporary opening and subsequent closure to a new molecule are of particular interest both synthetically and theoretically. Only rearrangement of five-membered heterocycles are discussed and reviewed. These transformations are classified into four groups: (a) "classical ring transformations", where the starting and resulting ring system is of the same size, but the heteroatoms and/or their positions have been changed: (b) "degenerate ring transformations" where during the course of the transformation the starting compound and product have the same ring system, but the reaction proceeds by a ring opening and subsequent ring closure process: (c) "ring contractions" and "ring expansions" where the sizes of the product rings are smaller or larger, respectively, than those of the starting compound, and (d) "pseudo ring transformations" or "ring-chain transfer", where the process is formally a ring transformation, but is realised by a ring closure of a side chain of the starting heterocycle and opening of the orirignal ring. Reaction mechanism of the most interesting ring transformations are also discussed. eng
dc.format p. 93-120 cze
dc.language.iso eng
dc.publisher Univerzita Pardubice cze
dc.relation.ispartof Scientific papers of the University of Pardubice. Series A, Faculty of Chemical technology. 11(2005) eng
dc.subject heterocyklické sloučeniny cze
dc.subject transformační reakce cze
dc.subject syntézy cze
dc.title Recent advances in ring transformation of five-membered heterocycles eng
dc.type article cze
dc.identifier.signature 47333
dc.peerreviewed yes eng
dc.publicationstatus published eng

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