Lc. Baillie et al., SYNTHESIS OF THE A E/F SECTIONS OF CONACONITINE, NAPELLINE AND RELATED DITERPENOID ALKALOIDS OF THE ACONITINE GROUP/, Journal of the Chemical Society. Perkin transactions. I (Print), (20), 1998, pp. 3471-3478
The tricyclic amines (+/-)-2; R = H and R = Me with five stereogenic c
entres, representing the A/E/F ring system of the title alkaloids, hav
e been synthesised from penta-1,4-dien-3-ol in eight (overall yield 20
%) and nine steps (overall yield 16%) respectively.