抄録
Heating of 1, 5-bis (5-nitro-2-furyl)-1, 4-pentadien-3-one amidinohydrazone hydrochloride (I) with sodium dihydrogenphosphate in dimethylformamide (DMFA) resulted in the reaction of the guanidine group with the double bond in I to form cyclized products, the α-form (II) and β-form (III) of 3-amino-5-(5-nitrofurfuryl)-6-[2-(5-nitro-2-furyl)-vinyl]-4, 5-dihydro-1, 2, 4-triazine. These compounds which have such electron-attracting group like nitrothiophene and nitrobenzene in place of nitrofuran ring, also formed analogous cyclized products with sodium dihydrogenphosphate but, the compound which lacks the nitro group did not give the reaction product.
