作者:YAMAMOTO, HIROSHI、OHIRA, CHIKARA、ASO, TOSHIAKI、PFLEIDERER, WOLFGANG
DOI:——
日期:——
2-Amino-1-methyl-1<i>H</i>-imidazole-4,5-dione: Synthesis and the Dimroth Type Rearrangement to Creatone (2-Methyl-amino-1<i>H</i>-imidazole-4,5-dione)
gave 2-t-butoxycarbonylamino-1-methyl-1,5-dihydro-4H-imidazol-4-one, which was oxidized with mercury(II) acetate to the corresponding 1H-imidazole-4,5-dione. Deprotection of the amino group of this dione afforded the title compound 4, which in turn was shown to undergo a facile, Dimroth-type rearrangement under weakly acidic conditions to give creatone, thus proving 4 to be the key intermediate in
The structure for a product of the oxidation of creatinine is revised to be N-(N′-methylamidino)oxamic acid (4). Acyclic product 4 and its cyclic product, 2-amino-1-methyl-4,5-imidazoledione, are coined as creatones B and A, respectively. The first synthesis of 2-methylamino-4,5-imidazoledione is also described.