Cyclic meso-ionic compounds. Part XII. Synthesis, spectroscopic properties, and chemistry of 1,3,4-oxadiazolium-2-aminides
作者:W. David Ollis、Christopher A. Ramsden
DOI:10.1039/p19740000642
日期:——
Representatives of a new class of meso-ionic heterocycles which are derivatives (II) of 1,3,4-oxadiazolium-2-aminide have been prepared. Their physical properties and chemical reactions are compared with those of the isomeric derivatives (I) of 1,3,4-triazolium-2-olate.
This invention relates to new processes for preparing an imidazole derivative, i.e. cimetidine, by (1) reacting an imidazolylmethylthioethylamine with an amidine or (2) reacting a N-cyano-N'-imidazolylmethylthioethyl formamidine with methylamine or (3) reacting a N-methyl-N'-imidazolylmethylthioethyl formamidine with cyanamide.