| abstract |
Isoxazoline of the general formula II <IMAGE> in which R<1>, R<2>, R<3> and R<4> denote unsubstituted or halogen-, haloalkyl-, alkoxy-, haloalkoxy-, nitro-, cyano-, dialkylphosphonyl- or alkoxycarbonyl-substituted alkyl, aryl, aralkyl, alkoxycarbonyl or dialkoxyphosphonyl, R<2> and R<4> also denote hydrogen and R<3> also denotes hydroxyalkyl, haloalkyl or hydroxyalkyl masked by a removable protective group, X denotes hydrogen or a removable protective group, and processes for the preparation of furans from the isoxazoles. |