(6) arose on exposure of the primary adduct 4 to dilute acetic acid; a direct route to 6 was provided by oxidation of 1-iminoallantoin (2) with iodine. Both dehydro-allantoin (8) and its 4-imino analogue 6 form covalent adducts (e.g. with MeOH) at the 5-position. A brief rationale which focusses upon the stepwise nature and regiochemical course of the reaction is presented.
POPOVIC, T.;SOKOLIC, LEA;MODRIC, NEVENKA;PALKOVIC, A.;POJE, M., TETRAHEDRON, 47,(1991) N, C. 317-322
作者:POPOVIC, T.、SOKOLIC, LEA、MODRIC, NEVENKA、PALKOVIC, A.、POJE, M.
DOI:——
日期:——
The mechanism for the conversion of uric acid into allantoin and dehydro-allantoin
作者:M. Poje、Lea Sokolić-Maravić
DOI:10.1016/s0040-4020(01)87480-9
日期:1986.1
The reaction of uricacids 1 with iodine in alkaline solution yields, on acidification, new dehydro-allantoins 11, or normal oxidation products, allantoins 13, depending on whether an excess or a stoichiometric amount of oxidant was used. The structure and regiochemistry of dehydro-allantoins 11 was established by chemical, spectroscopic, and 14C-labelling methods. These experimental results, in combination