Chromium(II) chloride is shown to be a useful reducing agent for benzoquinones and 1,4-naphthoquinones. 2-Alkyl-3-hydroxy-1,4-naphthoquinones are reduced to the trihydroxynaphthalenes by chromium(II) acetate and to the 1,3-dihydroxynaphthalenes by chromium(II) chloride in the presence of hypophosphorus acid.
J. R. Hanson and S. Mehta, J. Chem. Soc. C, 1969, 2349 DOI: 10.1039/J39690002349
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