Richard Stoermer and Ed. Oetker'first obtained 6-aldehydo-coumarin (melting at 189') as an intermediate product in the synthesis of coumarin-6-carboxylic acid from 6- acetoxymethylcoumarin, but it was never prepared in quantity and no work appears to have been done with it. In the present case p-coumaric aldehyde or 6-aldehydo-coumarin has been prepared in quantity by the application of Reimer and Tiemann's reaction on ...
