+++Tetrahedron

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Помогите, пожалста, с двумя статьями

1. Simple and condensed β-lactams, part 31. Acid catalyzed ring closures and ring transformations of some 3-aryloxy-4-oxoazetidine-2-carbaldehydes
Ferenc Bertha, József Fetter, Mária Kajtár-Peredy, Károly Lemperta and Gábor Czira
Tetrahedron, Volume 54, Issue 50, 10 December 1998, Pages 15227-15242

Код: Выделить всё

http://dx.doi.org/10.1016/S0040-4020(98)00951-X

2. Free radical synthesis of benzofused tricyclic β-lactams by intramolecular cyclization of 2-azetidinone-tethered haloarenes
Benito Alcaidea, Pedro Almendros, Alberto Rodríguez-Vicente and M. Pilar Ruiz
Tetrahedron, Volume 61, Issue 11, 14 March 2005, Pages 2767-2778

Код: Выделить всё

http://dx.doi.org/10.1016/j.tet.2005.01.082

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