Bicyclo[4.2.0]oct-1(8)-ene-8-carboxamides
undergo alternating ring-opening
metathesis polymerization (AROMP) with cyclohexene. Herein, a general
method for the preparation of bicyclo[4.2.0]oct-(8)-ene-8-carboxy
derivatives is described. The central 8-cyano intermediate provides
entry to five different functional group substituents on the alkene.
These monomers were tested as potential substrates for AROMP with
cyclohexene. In addition to the carboxamide, the carboxynitrile and
carboxaldehyde are also substrates for AROMP. In the case of the carboxaldehyde,
the polymer is regioregular. However, the addition of carboxynitrile
is stereoirregular and slow.