Acylation of nitronates affords alpha-acyloxyoxime derivatives via an umpolung functionalization of the alpha-position. This transformation involves generation of hitherto unknown N-acyloxy,N-oxyenamines and their fast [3,3]-sigmatropic rearrangement driven by the cleavage of the weak N-O bond. The reaction has a broad scope, and it is regioselective in the case of nitronates possessing nonsymmetrically substituted alpha-positions. Application to the formal total synthesis of clausenamide and cis-clausenamide is presented.
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Merck & Co Inc, Dept Proc Res & Dev, 126 E Lincoln Ave, Rahway, NJ 07065 USA
Univ Illinois, Dept Chem, 845 W Taylor St, Chicago, IL 60607 USAMerck & Co Inc, Dept Proc Res & Dev, 126 E Lincoln Ave, Rahway, NJ 07065 USA
Shevlin, Michael
Strotman, Neil A.
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Merck & Co Inc, Dept Proc Res & Dev, 126 E Lincoln Ave, Rahway, NJ 07065 USAMerck & Co Inc, Dept Proc Res & Dev, 126 E Lincoln Ave, Rahway, NJ 07065 USA
Strotman, Neil A.
Anderson, Laura L.
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Univ Illinois, Dept Chem, 845 W Taylor St, Chicago, IL 60607 USAMerck & Co Inc, Dept Proc Res & Dev, 126 E Lincoln Ave, Rahway, NJ 07065 USA
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Univ Louisville, Dept Chem, Louisville, KY 40292 USAUniv Louisville, Dept Chem, Louisville, KY 40292 USA
Kumar, Manish
Scobie, Martin
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Karolinska Inst, Dept Med Biochem & Biophys, Sci Life Lab, Div Translat Med & Chem Biol, Stockholm, SwedenUniv Louisville, Dept Chem, Louisville, KY 40292 USA
Scobie, Martin
Mashuta, Mark S.
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Univ Louisville, Dept Chem, Louisville, KY 40292 USAUniv Louisville, Dept Chem, Louisville, KY 40292 USA
Mashuta, Mark S.
Hammond, Gerald B.
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Univ Louisville, Dept Chem, Louisville, KY 40292 USAUniv Louisville, Dept Chem, Louisville, KY 40292 USA
Hammond, Gerald B.
Xu, Bo
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Univ Louisville, Dept Chem, Louisville, KY 40292 USAUniv Louisville, Dept Chem, Louisville, KY 40292 USA