skip to main content
Idioma:

Sulfur-containing optically active polymers: 2. Synthesis and chiroptical properties of poly(γ-ketosulfide)s containing the (2 R,3 R)-1,4-dimercapto-2,3-butanediolbutyraldehyde-acetal moiety

Angiolini, Luigi ; Carlini, Carlo ; Salatelli, Elisabetta

Polymer (Guilford), 1993-01, Vol.34 (18), p.3778-3786 [Periódico revisado por pares]

Elsevier Ltd

Texto completo disponível

Citações Citado por
  • Título:
    Sulfur-containing optically active polymers: 2. Synthesis and chiroptical properties of poly(γ-ketosulfide)s containing the (2 R,3 R)-1,4-dimercapto-2,3-butanediolbutyraldehyde-acetal moiety
  • Autor: Angiolini, Luigi ; Carlini, Carlo ; Salatelli, Elisabetta
  • Assuntos: (−)- l-dithiothreitol ; induced optical activity ; optically active poly(γ-ketosulfide)s
  • É parte de: Polymer (Guilford), 1993-01, Vol.34 (18), p.3778-3786
  • Descrição: Optically active poly(γ-ketosulfide)s containing the (2 R,3 R)-1,4-dimercapto-2,3-butanediol moiety were reacted with butyraldehyde to obtain the corresponding acetalized derivatives. The optically active low-molecular-weight analogues were also similarly prepared. High- and low-molecular-weight products were characterized by spectroscopic methods and chiroptical techniques. The conformational and stereochemical features of the macromolecules, as compared with the polymeric precursors as well as the low-molecular-weight analogues, are discussed on the basis of nuclear magnetic resonance (n.m.r.) and circular dichroism measurements. In particular, n.m.r. data indicate that the acetalization reaction does not appreciably modify the diastereomeric distribution of the constitutional repeating units and circular dichroism spectra confirm the presence of asymmetric induction on the chromophoric groups, although no evidence is found of structurally ordered conformations having one largely prevailing single chirality.
  • Editor: Elsevier Ltd
  • Idioma: Inglês
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  6 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.