| 摘要 |
Isoxazolines of the general formula II <IMAGE> (II) in which R1, R2, R3 and R4 are each unsubstituted or halogen-, haloalkyl-, alkoxy-, haloalkoxy-, nitro-, cyano-, dialkylphosphonyl- or alkoxycarbonyl-substituted alkyl, aryl, aralkyl, alkoxycarbonyl or dialkoxyphosphonyl, R2 and R4 are each also hydrogen and R3 is also hydroxyalkyl which is unblocked or blocked by a detachable protective group or is haloalkyl, X is hydrogen or a detachable protective group, are used to prepare furans.
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