Phenol–dienone rearrangement in the reactions of phenols

CONTENTS
I. Introduction 75
II. Effect of structure of phenol on ease of formation of dienone compounds 75
III. Halogenation of phenol. Tribromophenol bromide 78
IV. Halogenation of alkylphenols 79
V. Reactivity of quinohalide compounds. Problem of methylenequinone 82
VI. Nitration of phenols 84
VII. Alkylation of phenols 85
VIII. Formation of dienones in radical reactions of phenols 87