Rm. Adlington et al., Towards a biomimetic synthesis of the marine alkaloids papuamine and haliclonadiamine: Model studies, TETRAHEDRON, 56(4), 2000, pp. 623-628
A plausible biosynthetic pathway for the isomeric marine alkaloids papuamin
e and haliclonadiamine via the double tandem ene cyclisation of a tetraened
iimine is proposed. Initial model studies directed toward the biomimetic sy
nthesis of these alkaloids are described which illustrate that the Lewis ac
id-promoted ene cyclisation of methyl-2-(methoxycarbonyl)dodeca-2,8-dienoat
e is critically dependent on the Delta-8 geometry. (C) 2000 Elsevier Scienc
e Ltd. All rights reserved.