Browsing by Author "Heredia Moya, Jorge"

Now showing items 1-6 of 6

    • (1 alpha, 12 alpha)-Ethyl 15-ethoxy-4-hydroxy-2-oxo-9-oxatetracyclo[10.2.2.0(1,10).0(3,8)]hexadeca-4,6,8, ... 
      Heredia Moya, Jorge; Krohn, Karsten; Florke, Ulrich; Araya Maturana, Ramiro (BLACKWELL PUBLISHING, 2006-09)
      (E)-Ethyl 3-(4-oxo-4H-chromen-3-yl)acrylate reacts in a Domino reaction with ethyl vinyl ether via intermediates to give the title bridged compound, C20H22O6, and by-products. The conformation of the carboxylate group in ...
    • Domino inverse electron demand Diels-Alder reactions of chromones with ethyl vinyl ether 
      Heredia Moya, Jorge; Krohn, Karsten; Florke, Ulrich; Pessoa Mahana, Hernán; Weiss López, Boris; Estévez, A.; Araya Maturana, Ramiro (PERGAMON-ELSEVIER SCIENCE LTD, 2007-06-01)
      E)-Ethyl 3-(4-oxo-4H-chromen-3-yi)acrylate (3), (E)-3-(4-oxo-4H-chromen-3-yl)-2-propenenitrile (12) and their 5-hydroxy-derivatives 11 and 13 undergo alternative, solvent dependent, domino reactions with ethyl vinyl ether. ...
    • Effects of simple and angular chromones on tumor cell respiration 
      Araya Maturana, Ramiro; Heredia Moya, Jorge; Donoso Tauda, Oscar; Vera Castillo, Mario Francisco; Toledo Hernández, Jorge; Pavani, Mario; Pessoa Mahana, Hernán; Weiss López, Boris; Ferreira Parker, Jorge (NATURAL PRODUCTS INC, 2008)
      A set of structurally related compounds incorporating a chromone moiety as an essential component of their structures were tested against the TA3 mouse carcinoma cell line and its multidrug-resistant variant TA3-MTX-R. A ...
    • Improved selective reduction of 3-formylchromones using basic alumina and 2-propanol 
      Araya Maturana, Ramiro; Heredia Moya, Jorge; Pessoa Mahana, Hernán; Weiss López, Boris (MARCEL DEKKER INC, 2003)
      Treatment of formylchromones, dissolved in 2-propanol with basic alumina at 75degreesC, selectively reduces the formyl group with good yields without any activation process of the alumina.
    • Long-range correlations ((n)j (C,H) n > 3) in the HMBC spectra of 3-(4-oxo-4H-chromen-3-YL)-acrylic acid ... 
      Araya Maturana, Ramiro; Gavin Sazatornil, J. A.; Heredia Moya, Jorge; Pessoa Mahana, Hernán; Weiss López, Boris (SOC BRASILEIRA QUIMICA, 2005-05)
      A systematic study about the long-range correlations observed in the HMBC spectra of a series of cis and trans 3-(4-oxo-4H-chromen-3-yl)-acrylic acid ethyl esters, and 5-hydroxy derivatives, was carried out. The results ...
    • On the reduction of 4-oxo-4H-benzopyran-3-carbaldehydes: Global and local electrophilicity patternse 
      Araya Maturana, Ramiro; Heredia Moya, Jorge; Escobar, C. A.; Pérez, P. (SOCIEDAD CHILENA DE QUIMICA, 2004-03)
      The theoretical global and local electrophilicity patterns of substituted and chelated 4-oxo-4H-benzopyran-3-carbaldehydes (formylchromones) have been evaluated using the electrophilicity index proposed by Parr et al [J. ...