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Beilstein J. Org. Chem. 2020, 16, 135–139, doi:10.3762/bjoc.16.15
Graphical Abstract
Figure 1: Aza-goniothalamin 1, (R)-(+)-goniothalamin 2 and acylated aza-goniothalamin analogue 3 [14-18].
Scheme 1: One pot synthesis of benzyl carbamate 4 reported by Veenstra and co-workers [19].
Scheme 2: Formation of diene 5 in 66% through a one pot, three component coupling.
Scheme 3: Optimized conditions for the synthesis of diene 5.
Scheme 4: Ring-closing metathesis reaction of diene 5 to yield dihydropyridone 7 [20-23].
Figure 2: Extension of the two-pot methodology to include a variety of different aldehyde starting materials.
Scheme 5: Total synthesis of aza-goniothalamin 1.