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Oxidation of (11Z)-1′,2′-didehydrostemofoline with DIB/TBHP/Mg(OAc) 2 ·4H 2 O resulted in oxidative cleavage of the C-11–C-12 double bond instead of the desired allylic oxidation of the 1-butenyl side chain. Stemofoline gave a similar result. The oxidation of more simple terminal alkenes was regioselective and gave vinyl ketones while allyl and benzyl ethers gave acrylate and benzoate...
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