Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

3- Acetyltetronic acids

Acetyltetronic acid derivatives (94) are formed during base-catalysed rearrangement of 4-ethoxycarbonyl-3(2//)-furanones (93). 3-(Arylmethylene)-furandiones (95) can be obtained in fair yield froni tetronic acid itself (for which an improved preparation has been found) by condensation with aromatic aldehydes (three equivalents ) in the presence of concentrated hydrochloric acid. Butyrolactones are transformed into their 2-keto analogues upon dye-sensitized photo-oxygenation of their readily available 2-dimethylaminomethylene derivatives, the overall yield for the two steps, with model compounds, being about 60%. °"... [Pg.93]

See other pages where 3- Acetyltetronic acids is mentioned: [Pg.60]    [Pg.209]    [Pg.8]    [Pg.60]    [Pg.596]    [Pg.273]    [Pg.280]    [Pg.209]    [Pg.8]    [Pg.60]   
See also in sourсe #XX -- [ Pg.8 ]



SEARCH



© 2024 chempedia.info