Summary
Treatment of sulphur-containing heterocyclic compounds such as thiodiphenylamine (I) and benzidine-sulphone (II) with Raney nickel in a suitable solvent gave the sulphur-free compounds diphenylamine and N∶N′-diethylbenzidine (reduction in ethyl alcohol).
β-Naphthol gave a mixture of 1∶2∶3⪉-tetrahydro-2-naphthol and 5∶6∶7∶8-tetrahydro-2-naphthol on reduction with Raney nickel in alcoholic alkaline solution. Naphthol AS (2-hydroxy-3-naphthanilide) yielded 5∶6∶7∶8-tetrahydro-2-hydroxy-3-naphthanilide and J-acid gave 6-amino-1-naphthol on treatment with Raney nickel.
Carbazole was unaffected when treated with Raney nickel in morpholine, but gave tetrahydrocarbazole when reduced in alcohol. 3-Chloro- and 3-aminocarbazole also gave tetrahydrocarbazole on reduction in alcohol and dioxan respectively.
Anthraquinone and 2-methylanthraquinone gave octahydro-derivatives on reduction in alcohol. Reduction in morpholine and in aqueous alkali gave several reduction products which are under investigation.
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Shah, K.H., Tilak, B.D. & Venkataraman, K. Raney nickel reductions—Part I. Proc. Indian Acad. Sci. (Math. Sci.) 28, 142 (1948). https://doi.org/10.1007/BF03170785
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DOI: https://doi.org/10.1007/BF03170785