%0 Journal Article
%T Oxidation of 5,6-Diamino-1,3-dimethyl-2,4-dioxopyrimidine by Perrhenate: the crystal structure of 1,3,6,8-Tetramethylpyrimidopteridine-2,4,5,7-tetrone
%A Booysen
%A Irvin
%A Gerber
%A Thomas I. A.
%A Mayer
%A Peter
%J Journal of the Brazilian Chemical Society
%D 2008
%I Sociedade Brasileira de Qu¨ªmica, SBQ
%R 10.1590/S0103-50532008000100028
%X the oxidation of 5,6-diamino-1,3-dimethyl-2,4-dioxopyrimidine (h2ddd) by perrhenate (reo4-) led to the formation of 1,3-dimethylalloxan, which condenses with unoxidized h2ddd to yield the product 1,3,6,8-tetramethylpyrimidopteridine-2,4,5,7-tetrone (tppt). the structure of tppt consists of a central pyrazine ring and two terminal pyrimidine rings in cis positions. the dihedral angles between the pyrazine and pyrimidine rings are 1.08¡ã and 1.20¡ã.
%K oxidation
%K diaminouracil
%K perrhenate
%K crystal structure.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532008000100028&lng=en&nrm=iso&tlng=en