Enamine chemistry. Part 37. Reaction of methyl vinyl ketone with Δ^1,8a-2-octalone dienamines. Synthesis of octahydro-1H-benzo[d]naphthalene-2,10(3H,11H)-diones and 9-acetylperhydro-2,4a-ethanonaphthalen-3-ones

(\pm)-12-Oxotricyclo[6.2.2.01,6]dodecane-10-carboxylic acid: hydrogen bonding in a tricyclic δ-keto acid

“…These have concluded that both [4+2] electrocyclic and polar stepwise processes can operate, with the observed mix dependent on speci®c conditions of reactant, solvent, etc. (Hickmott & Simpson, 1992). Despite the alternative con®gurational options available at C6 and C10, compound (I) was the only crystalline material isolated from the reaction sequence involved, and whether the con®gurations in (I) are the result of kinetic or thermodynamic processes is unknown.…”