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Showing 1 to 1 of 1 for “"C19-diterpenoids"”.
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Complex botanical natural products: Synthesis of cephalotaxus esters and of the C19-diterpenoid skeleton of aconitum and delphinium alkaloids
… The completed synthesis of the skeleton of the C19-diterpenoid alkaloids is described. Key steps include a Diels–Alder cycloaddition of a cyclopropene with a 2,5-dioxycyclopenta-1,3-diene, a second Diels–Alder cycloaddition with a 2,5-dihydroazepine 2π component, an intramolecular N-acyliminium …