Oxidation process

Details Oxidation process Oxidation process

C - Chemistry, Metallurgy

07

D

C07D 321/00 (2006.01) C07B 33/00 (2006.01) D21C 3/00 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2121339

2121339 9308144 PCTABS00021 A process for oxidising a substrate susceptible to nucleophilic oxidation by reacting a bicarbonate or monopersulphate solution with the substrate is disclosed. In one aspect the substrate is introduced into the reaction mixture in an inert carrier gas, which can also serve to sweep the product out of the mixture. In a second aspect, the oxidant solution is obtained by a two stage neutralisation of a Caro's acid solution, the first stage to e.g. 0.5 to 2.0 and the second stage to about 7 to 9. In preferred embodiments, the substrate is introduced into partially neutralised Caro's acid, and the second stage neutralisation in the presence of the substrate is most preferably carried out with an alkali salt such as sodium bicarbonate. The process can employ relatively low ratios of substrate: Caro's acid oxidant and homogeneous reaction conditions. The process is particularly useful for preparing dioxiranes from ketones.

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