Synthesis of new types of strained hydrocarbons by cyclo-codimerization of quadricyclane with norbornenes and their derivatives, catalyzed by palladium complexes
作者:U. M. Dzhemilev、R. I. Khusnutdinov、V. A. Dokichev、D. K. Galeev、A. I. Malikov、G. A. Tolstikov、O. M. Nefedov
DOI:10.1007/bf00961046
日期:1991.11
The codimerization of quadricyclane (QC), the valence isomer of norbornadiene (NBD), with norbornene compounds was studied in the presence of Pd(0) 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.