Abstract

The syntheses of 1-benzyl-7-butyl-1-azaspirocyclo[5.5]undec-7-ene (14) [a formal precursor of perhydrohistrionicotoxin (2)] and the thermodynamically preferred, exocyclic isomer (13) in six steps from the readily available N -benzyloxycarbonyl-10-amino-Δ 1,9-octalin (5) are reported.

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