[heathcliff]

hey all,

can anybody show me the mechanism for this coversion?

cheers!



 

[Custos]

How about something like this. A cycloaddition of the deprotonated aldoxime followed by an oxidation step to give the product. Another alternative is the oxidative step first to give a titrile oxide, which will undergo cycloaddition with the allyl group to give the isoxazoline. However, that puts the double bond in the wrong position and would require a double-bond migration, which frankly I think is unlikely.