THERMAL BEHAVIOR OF BICYCLO2.2.2OCTADIENE-INSTALLED PRECURSORS FOR 2H-ANTHRA2,3-c PYRROLES AND ANTHRA2,3-cTHIOPHENE

摘要

4,11-Ethano-4,11-dihydro-2H-anthra2,3-cpyrrole and 4,11-ethano-4,11-dihydroanthra2,3-cthiophene derivatives were prepared from the corresponding bicyclo2.2.2octadiene-fused five-membered heterocycles by the Diels-Alder reaction with in situ generated α,α'-dibromo-o-xylylene derivatives. Their thermogravimetric analyses showed evapolation without formation of 2H-anthra2,3-cpyrrole and anthra2,3-cthiophene derivatives under the atmospheric pressure.