
%0 Journal Article
%A Paul, DB 
%A Rodda, HJ 
%T Pyridopyridazines. II. Some reactions of Pyrido[2,3-d]- and Pyrido[3,4-d]-pyridazine
%J Australian Journal of Chemistry
%D 1969/08/01
%V 22
%N 8
%P 1745-1757
%K 
%R https://doi.org/10.1071/CH9691745
%U https://www.publish.csiro.au/paper/CH9691745 
%X Pyridopyridazines have been oxidized under acid and alkaline conditions and the sites of oxidation have been rationalized on the basis of charge densities. Pyrido-[2,3-d]pyridazine has been brominated, aminated, and made to react with hypo-chlorous acid and with peracids. The positions of substitution and addition are discussed in relation to calculated &#960;-electron densities and bond lengths. Attention is drawn to some unusual features of the N.M.R. spectra of 1,2-diazine N-oxides. 
