Abstract
We report here a simple synthesis of formamidinesulfinic acids and formamidines. These compounds are useful in several fields of chemistry. Formamidinesulfinic acids are reducing agents for organic synthesis and for photography.1 They also show marked tumor inhibition.2 Formamidines are of interest as synthetic intermediates3 and as anthelmintic drugs.4 Formamidines are commonly synthesized by the reaction of amines with hydrogen cyanide or with triethyl orthoformate.5