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pro vyhledávání: '"Antun Palković"'
Publikováno v:
ChemInform. 22
Representations of two consecutive products of the Denicke reaction were shown to be incorrect. Oxidation of uric acid (1a) by ferricyanide in aqueous ammonia gives 5-amino-4-iminoallantoin (4) and 1,5-diamino-3,7-dioxo-2,4,6,8-tetraazabicyclo[3.3.0]
Publikováno v:
Tetrahedron. 41:4681-4684
Alloxanic acid ureides ( 3 ) formed by oxidative ring fission at the 3,4-bond of uric acids ( 1 ), undergo a facile rearrangement to isomeric products whose ammonium caffolide structure 5 was established by synthesis and confirmed by X-ray analysis o