
%0 Journal Article
%A Barlin, GB 
%T Reaction of 3,4-Diaminopyridazine with &#945;,&#946;-Dicarbonyl compounds, carbon disulfide and urea, and methylation of some of the products
%J Australian Journal of Chemistry
%D 1981/06/01
%V 34
%N 6
%P 1361-1366
%K 
%R https://doi.org/10.1071/CH9811361
%U https://www.publish.csiro.au/paper/CH9811361 
%X 3,4-Diaminopyridazine has been shown to condense with benzil, diacetyl and phenylglyoxal to give 6,7-diphenyl-, 6,7-dimethyl- and 6(7)-phenyl- pyrazino[2,3-c]pyridazine, respectively.     Syntheses of 2-, 5- and 7-methyl-6-methylthioimidazo[4,5- c]pyridazine have been described. Methylation of 6-mercaptoimidazo[4,5- c]pyridazine with diazomethane gave 1- and 7-methyl-6- methylthioimidazo[4,5-c]pyridazine but methyl iodide gave 1- and 2- methyl-6-methylthioimidazo-[4,5-c]pyridazine. Diazomethane methylation of 6-hydroxyimidazo[4,5-c]pyridazine gave three dimethyl derivatives of which one was identified as 6-methoxy-1-methylimidazo[4,5-c]pyridazine. 
