New annulation reactions of cyclobutenon
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John L. Dillon; Qi Gao; Elizabeth A. Dillon; Nick Adams
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Article
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1997
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Elsevier Science
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French
โ 263 KB
Dichlorocyclobutenones la and lc were exploited in the synthesis of UnsaNated lactones 9 and 10 via intramolecular entrapment of a vinylketene with an alcohol. In contrast, tbermolysis of dichlorocyclobutenones lb or Id in methanol led to unsaturated ketone 14 through deprotection, intramolecular Mi