摘要:
A synthetic route to novel N-{5-oxo-2-thioxo(2,5-dithioxo) hexahydroimidazo[4,5-d]imidazol-1(2H)-yl} formamides, by a tandem N-formylation and ring-contraction reaction of 5,7-disubstituted 3-thioxoperhydroimidazo[4,5-e]-1,2,4-triazine-6-ones(thiones) with formic acid, has been developed.