Finklestein reaction

These ethers can be removed from naphthohydroquinones either by elimination to the vinyl ether followed by hydrolysis or by Finklestein reaction with iodide followed by reduction with zinc. ... 

Displacement of a chloride, conveniently derived from the benzhydrol, has often been utilized. However, running the reaction with sodium iodide in acetonitrile improved yields of the displacement reaction, presumably via a Finklestein reaction (Scheme 2). 

Finklestein, A., and W.A. Noyes, Jr. (1953), The reactions of radicals from diethyl ketone with oxygen and general discussion, Faraday Soc. Discussion, No. 14, 76-84. 

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