| Summary: | The thesis describes the use of polycyclic quinodimethanes and related compounds as reactive intermediates in the synthesis of polycyclic aromatic and heterocyolic systems, some of which are novel. Following a general introduction (Chapter I), Chapter II describes the reactions of 5,6-chrysaquinodimethane to give dimers, and its reactions with various dienophiles; including 1 ,4-naphtho quinone, with which it gives a novel ring system. Chapter II describes the reaction of 9,10-phenanthraquinodimethane with 1,4-naphthoquinone and attempts to synthesise 6,12-chrysaquinone from chrysene. The reactions of 9 ,10-anthraquinodimethane with various dienophiles are described (Chapter III) while Chapter IV describes the reactions of 9-methyleneanthrone and 1O-methyl-10-hydroxyanthrone with dimethyl aoetylenedicarboxylate and diethyl azodicarboxylate. Chapter V describes the reactions of 1, 1-diphenylethylene with various dienophiles to give novel adducts; and Chapter VI describes the preparation of endo-adducts of anthranol.
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