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4-Hydroxycarbazole can be obtained from 1,2,3,4-tetrahydro-4-oxocarbazole via dehydrogenation with freshly prepared Raney nickel.
H 1923 (OTTO) 4-Hydroxycarbazole, 97% Cas 52602-39-8 - used in the synthesis of the following 4-(2-bromoethoxy)-9H-carbazole.