Abstract
Oxidative Coupling of CH‐acid Compounds with p‐Phenylene Diamines. II. Reactivity of 4‐Substituted 1‐Hydroxy‐phenyl‐2‐naphthalene‐carboxamides with N,N‐Diethyl‐quinone‐(1,4)‐diamineSubstitution products of 1‐hydroxy‐N‐3,5‐(dimethoxycarbonyl)‐phenyl‐2‐naphthalenecarboxamide 1–16 with halogene, ‐OR, ‐SR and ‐NRR′ substituents in position 4 were synthesized. A great part of these compounds react with N,N‐diethyl‐quinone‐(1,4)‐diimine by elimination of the substituent giving the same indophenol dye which is received by oxidative coupling of the unsubstituted compound. Evidence about the degree of side reactions is obtained by measurement of dye yields.
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