Solid-State Organic Reactions Proceeding by Pulverization of Inorganic Solid-Supports. Reactions of lodosobenzene with Unsaturated Hydrocarbons on Acid-Treated Silica Gel
Pulverization-activation method was employed to accelerate solid-state organic reactions. Crushing and grinding of solid mixtures of hydrogen halide-treated silica gels, iodosobenzene and organic substrates in the absence of a solvent brought about smooth and rapid reactions to give halogenated and/or oxidized products in good yields. Various sulfides were smoothly converted to sulfonyl chlorides in one step in excellent yields. The surface of silica gel activated by pulverization serves as a reaction field on which reagent molecules can effectively encounter with each other. (C) 1998 Elsevier Science Ltd. All rights reserved.
Campbell, Journal of the Chemical Society, 1915, vol. 107, p. 919