作者:Antonio Gómez-Sánchez、Isidro Hermosín、Jose-María Lassaletta、Inés Maya
DOI:10.1016/s0040-4020(01)85814-2
日期:1993.2
Malondialdehyde (MDA) slowly self-condensates in aqueous solution at pH 4.5-6 and room temperature yielding (E)-(3'-oxo-1'-propenyl)malondialdehyde and 2,4-dihydroxymethylene-3-(2'-oxoethyl)glutaraldehyde. The latter compound exists in solution in equilibrium with 4-(1,3-dioxopropan-2-yl)-5-formyl-2-hydroxy-3,4-dihydro-2H-pyran, the trans-form of which can be readily isolated as a crystalline hemipotassium salt. Cleavage of MDA also occurs under these conditions leading to acetaldehyde, which further reacts with the excess of MDA to form 2,4-dihydroxymethylene-3-methylglutaraldehyde.