H yd roxyq u in o n e An nelat io n ... Marcus A. Tius," Jean M. Cullingham, and S. Ali Department of Chemistry, University of Hawaii, 2545 The Mall, Honolulu, Hawaii 96822, USA ... The epoxidation reaction of alkoxyallene (4a) produced epoxy ketoaldehyde (5a) through an intermediate oxyallyl zwitterion; an intramolecular aldol reaction, followed by air oxidation produced hydroxyquinone (6). ... Hydroxyquinones and aminoquinones are common structural elements of natural ...
![2-acetyl-2-(methoxymethoxy)-1-oxaspiro[2.5]octane-4-carbaldehyde Structure](https://image.chemsrc.com/caspic/080/125748-63-2.png)
