Studies towards the total synthesis of solanoeclepin A: synthesis and potato cyst nematode hatching activity of analogues containing the tetracyclic left-hand substructureElectronic supplementary information (ESI) available: further experimental details. See http://www.rsc.org/suppdata/p1/b2/b202020n/
- 24 June 2002
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 14,p. 1701-1713
- https://doi.org/10.1039/b202020n
Abstract
In our studies towards the total synthesis of solanoeclepin A, a natural hatching agent of potato cyst nematodes, three analogues containing the tetracyclic left-handed substructure have been synthesised. First, the synthesis of the parent tetracycle 2 in enantiopure form is reported. Key steps are (1) chromium-mediated coupling of aldehyde 5 (see preceding paper in this issue) and vinyl triflate 6 to furnish an α,β-unsaturated lactone, which was transformed into triene 4 in six-steps, (2) ring-closing metathesis of 4 to tetracycle 3 and (3) oxidative functionalisation of the least substituted double bond of 3 to provide the fully functionalised tetracyclic left-handed substructure of solanoeclepin A. The methodology developed was successfully applied in the synthesis of two more elaborate solanoeclepin A analogues 9 and 11. Both compounds, prepared as mixtures of diastereomers, showed promising biological activity in hatching activity tests.Keywords
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