%0 Journal Article
%T Synthesis and spectroscopic characterization of 5-diaminomethylidene barbiturates
%A Figueroa-Villar Jos¨¦ D.
%A Clemente F¨¢bio C.
%A Silva Ana C. C. da
%J Journal of the Brazilian Chemical Society
%D 2001
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%X The reaction of amines with dithiocyclohexylidenes is a general reaction for the synthesis of diaminomethylidene barbiturates. When diamines of the type H2N-(CH2)n-NH 2 are used as nucleophiles bicyclic compounds are the major reaction products, with yields increasing as n decreases, n = 2, 3, 4. When n = 6, macrocyclic compounds, novel 18 and 27 member rings, are obtained in very good yields. The 1H and 13C NMR assignment for all products is discussed.
%K macrocycles
%K diaminomethylidene barbiturates
%K dithiocyclohexylidenes
%K dithiolane
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532001000200020