Vol.2, No 2, 2000 pp. 109 - 113
UDC 547-327

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CONFORMATION OF N-SUBSTITUTED 2-PHENYLBUTANAMIDES
Dušan Ž. Mijin, Biljana M. Božić, Slobodan D. Petrović
Department of Organic Chemistry, Faculty of Technology and Metallurgy,
University of Belgrade, Karnegijeva 4, P.O. Box 3503, 11001 Belgrade, Yugoslavia

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Abstract. Various N-substituted 2-phenylbutanamides, CH₃CH₂CH(Ph)CONHR, where R is ethyl, n-butyl, i-butyl, cyclohexyl and phenyl, were synthesized. They were characterized by m.p., FT-IR, 1H NMR and mass spectra. Depending on the kind of substituent on the nitrogen atom, some of the examined amides (R = cyclohexyl, phenyl) exist in different conformational forms while other exist only in the trans form.
Key words: N-substituted 2-phenylbutanamides, conformation, synthesis.

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KONFORMACIJE N-SUPSTITUISANIH 2-FENILBUTANAMIDA Različiti N-supstituisani 2-fenilbutanamidi formule CH₃CH₂CH(Ph)CONHR, gde R predstavlja etil, n-butil, i-butil, cikloheksil i fenil grupu, su sintetizovani i definisani temperaturom topljenja, FT-IR, 1H NMR i MS. U zavisnosti od supstituenta na atomu azota, neki od ispitivanih amida se nalaze u različitim konformacionim oblicima (R=cikloheksil, fenil) dok se ostali amidi nalaze samo u trans obliku..