Formamidinoylisothiocyanate—II : Isomerisierung,dimerisierung und kondensations-reaktionen von formamidinoylisothiocyanaten

Formamidinoylisothiocyanates isomerize easy and give 3 H-chinazolinthiones-(4). The dimerization of formamidinoylisothiocyanates yields derivatives of s-triazines by 1.4-1′.2′-cycloaddition. Further cycloadditions are possible with phenylisocyanate and hydrogen thiocyanate.Formamidinoylisothiocyanates undergo intermolecular elimination of hydrogen thiocyanate yielding derivatives of chinazolin, which are substituted with amidino-groups.