The copper-catalyzed condensation of 2-substituted iodobenzenes with 2-substituted anilines yielded the novel 2,2 ',2' '-trichloro-, trimethyl-, and trimethoxytriphenylamines. Cleavage of the trimethoxy species produced 2,2 ',2' '-nitrilotriphenol which was shown to be an effective chelating agent, reacting with a variety of silanes (ZSiX3) to form monomeric pentacoordinate derivatives, ZSi(OC6H4)3N; related aluminum and titanium chelates were also i_i prepared. The use of o-dianisidine in the above condensation yielded , , ',N '-tetrakis(2-methoxyphenyl)-3,3 'dimethoxybenzidine; cleavage afforded N,N,N',N'-tetrakis(2-hydroxyphenyl)-3,3'-dihydroxybenzidine, a hexaol from which a dimeric pentacoordinate silicon derivative was prepared.
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