Robert W. Jordan

Reactivity of the alkene component in the ruthenium-catalyzed [2+2] cycloaddition between an alkene and an alkyne: Part 2☆

Abstract Ruthenium-catalyzed [2+2] cycloadditions of 2,3-disubstituted norbornadienes and 2-substituted norbornadienes with an alkyne were found to be highly chemo- and stereoselective with moderate level of regioselectivities and only small rate differences were observed with different substituents on the norbornadiene.

Ethyl 7‐exo‐acetoxy‐4‐phenyl­tri­cyclo­[4.2.1.02,5]­non‐3‐ene‐3‐carboxyl­ate

The regio- and stereochemistry of the title compound, C20H22O4, has been established by X-ray analysis. The bond lengths and angles are normal.

Ethyl 7‐oxo‐4‐phenyl­tri­cyclo­[4.2.1.02,5]­non‐3‐ene‐3‐carboxyl­ate

The regio- and stereochemistry of the title compound, C18H18O3, has been established by X-ray analysis. The bond lengths and angles are normal.

3-Ethoxy-7-methoxy­carbonyl-4-phenyl­tricyclo­[4.2.1.02,5]­non-3-ene

The regio- and stereochemistry of the title compound, C20H22O4, has been established by X-ray analysis. The molecular dimensions are normal.