Abstract:Trichloroacetaldehyde was successfully used for the cyclisation of bis-amidines of oxalic acid 1 to afford cycloaminals in good yields. Although prototropism is a characteristic feature of the amidines the cyclisation reaction can be realized in a regioselective manner to give three types of cycloaminals 6, 7 and 8. Starting from cycloaminals 8 carbenes can be generated which immediately dimerize to the corresponding 2,3,6,7-tetrakis(arylamino)-1,4,5,8-tetraazafulvalenes 5.
Set email alert for when this publication receives citations?
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.