4-hydroxy-2-nonenal and 1-1-dimethoxyethane

The facile one step synthesis of 4-hydroxy-2E-nonenal and its dimethyl acetal via a cross-metathesis reaction between commercially available octen-3-ol and acrolein or its dimethyl acetal is reported. The method was extended to the synthesis of C6 and C12 4-hydroxy-2E-enals, their dimethyl acetal and of the 4-hydroxy-2E-nonenoic acid (4-HNA).

Topics: Acetals; Aldehydes; Biochemistry; Catalysis; Cysteine Proteinase Inhibitors; Hydroxyl Radical; Lipid Peroxidation; Lipids; Models, Chemical; Molecular Structure; Reproducibility of Results

4-Hydroxy-2-trans-nonenal, the most abundant and toxic unsaturated aldehyde generated during membrane lipid peroxidation, was synthesized starting from fumaraldehyde dimethyl acetal. In the first step of the synthesis, the fumaraldehyde dimethyl acetal was partially hydrolyzed using amberlyst catalyst to obtain the monoacetal. The 4-hydroxy-2-trans-nonenal was synthesized by the Grignard reaction of the fumaraldehyde monoacetal with 1-bromopentane. 4-Hydroxy-2-trans-nonenal, obtained as its dimethylacetal, was oxidized to its corresponding 4-keto derivative using pyridinium chlorochromate buffered with sodium acetate as the oxidizing agent. 4-(3H) 4-Hydroxy-2-trans-nonenal was obtained in one step by the sodium borotriteride reduction of the 4-keto derivative.

Topics: Acetals; Aldehydes; Isomerism; Isotope Labeling; Tritium