Synthesis of a new type of conformationally constrained alfa, alfa-disubstituted-beta-amino acids and beta-lactams in enantiomerically pure form
- Avenoza, A. 2
- Cativiela, C. 1
- París, M. 2
- Peregrina, J.M. 2
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1
Instituto de Nanociencia y Materiales de Aragón
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2
Universidad de La Rioja
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ISSN: 0957-4166
Año de publicación: 1995
Volumen: 6
Número: 6
Páginas: 1409-1418
Tipo: Artículo
beta Ver similares en nube de resultadosOtras publicaciones en: Tetrahedron: Asymmetry
Resumen
Optically active cis-, 8a and 8b, and trans-1-aminomethyl-2-phenylcyclohexane-1-carboxylic acids, 9a and 9b, were obtained starting from 1,3-butadiene using Diels-Alder cycloadditions with chiral (E)-2-cyanocinnamates as key steps and following a protocol of stereocontrolled reactions. Subsequent cyclization of these conformationally constrained β-amino acids led to the corresponding α,α-disubstituted-β-lactams 10a, 10b, 11a and 11b in enantiomerically pure forms.