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Total synthesis of Butterfly Compound:
Reference: Sum, F. W.; Weiler, L. Chem. Commun. 1978, 985
Keywords: CarboxEster -> Alkyl-OH --- O-THP -> O-H --- Ketoester dianion+Alkyl-X --- Cu-Me+EnoateEster --- Ketoester dianion+Allyl-X --- Cu-Me+EnoateEster --- Allyl-OH -> Allyl-Br --- Finkelstein reaction
Reagents: BuLi(n) --- Bromoethanol --- P(O)(OEt)2Cl --- LiCuMe2 --- AlH4-Li+ --- BuLi(n) --- Bromide, lithium --- Acetoacetate --- BuLi(n) --- P(O)(OEt)2Cl --- LiCuMe2 --- NaH --- NaH --- MeSO2Cl

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