STEREOCONTROLLED CONSTRUCTION OF A SPIRO FUSED BICYCLOOCTANE RING SYSTEM BY THE INTRAMOLECULAR DOUBLE MICHAEL REACTION
The lithium enolate from the cyclohexenone (8) possessing the α,β-unsaturated ester moiety caused an intramolecular double Michael reaction to produce stereoselectively the spiro fused bicyclo-octane (10).