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Beilstein J. Org. Chem. 2022, 18, 1642–1648, doi:10.3762/bjoc.18.176
Graphical Abstract
Scheme 1: Previous works and this work.
Scheme 2: Scope and limitation of the rhodium-catalyzed reductive aldol-type cyclization. aIsolated yield. bD...
Scheme 3: Detection of metal-enolate and proposed mechanism of intramolecular cyclization.
Figure 1: Bioactive natural products bearing a 3-hydroxy-2-methyllactone scaffold.
Figure 2: Monocrotaline and its structural components.
Scheme 4: Synthetic route towards chiral necic acid lactone (2S,3S,4R)-2j. Conditions: a) CH3SO2NH2, AD-mix-β...
Figure 3: Molecular structure of necic acid lactone (2S,3S,4R)-2j in the crystal.