SYNTHESIS OF NEW TYPES STRAINED HYDROCARBONS BY CYCLOCODIMERIZATION OF QUADRICYCLE WITH NORBORNENES AND THEIR DERIVATIVES, CATALYZED BY PALLADIUM COMPLEXES

Article abstract of DOI:10.1007/BF00961046

The codimerization of quadricyclane (QC), the valence isomer of norbornadiene (NBD), with norbornene compounds was studied in the presence of Pd(O) complexes.Codimerization of QC with norbornene, 5-methyl- and 5-methylenenorbornene, exo-tricyclo<3.2.1.0^2,4>octene-6, tetracyclo<4.2.0.0^2,4.0^3,7>nonene-8, and penta- and hexacyclic NBD dimers was carried out in the presence of PPh3-activated Pd2(DBA)3*CHCl3 to afford a new class of hexa- to nonacyclic strained hydrocarbons with exo- and endo-tetracyclo<4.2.0.0^2,4.0^3,7>nonane fragments.