beta-(2-Aminophenyl)-alpha,beta -ynones react with enamines of cyclic keton
es by domino [2+2]cycloaddition/annelation reaction giving rise to bicyclo[
4.2.0]-octane[7,8-c]-2-aryl quinolines or to c-fused quinolines. The reacti
vity of ynones towards acyclic enamines and thermal rearrangement of tetrac
yclic to the corresponding tricyclic derivatives are also described. (C) 20
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