Benzidine rearrangement reactions of polyether tethered cyclic N,N'-diaryl hydrazides.


N,N'-Diaryl hydrazides tethered with a polyether group at the meta positions undergo [5,5]-sigmatropic (benzidine) rearrangement reactions to furnish 4,4'-diamino-biphenyls (benzidines) strapped with a polyether unit at the 2,2'-positions. 


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