Reakcje utleniania wybranych grup funkcyjnych z wykorzystaniem oxone® jako źródła tlenu cząsteczkowego The oxidation reactions of selected functional groups using oxone® as a source of molecular oxygen
Oxidation reactions belong to the group of the most commonly used processes
in both organic and inorganic chemistry. The main issues in such transformation
are usually safe handling of the oxidants as well as waste generation.
Peroxymonosulfuric acid is one of the strongest oxidants. It was described
for the first time in 1898 by Heinrich Caro. Nowadays, the commercial sources of
KHSO5 are low-cost industrial bulk chemicals, e.g., the triple salt Oxone® (2KHSO5·
KHSO4·K2SO4). These products are stable oxidizing agents commonly used in fine
chemicals synthesis, and are easy to handle, non-toxic as well as generate non-polluting
by-products.
Over the past several years the scope of its use has extended. One of the most
important transformation that have been made possible with the use of Oxone® are
epoxidation and ketone formation. Epoxides and ketones are important synthetic
building blocks widely used in the chemical industry for the production of pharmaceutical
products, flavours, fragrances, resins, adhesives and paints.
The use of Oxone® was demonstrated in several combinations both in classical
methods that involved metal catalysis as well as in novel approaches with the use of
microwaves and ionic liquids. Over the past 20 years, ionic liquids, together with
supercritical fluids and water, have become powerful alternatives to conventional
organic solvents. Ionic liquids are salts having in the structure an organic cation and
an inorganic or organic anion, with a melting point below 100°C. The advantage of
using ionic liquids is a big variety of available structures. Combinations of both ionic
liquids and Oxone® offer an interesting alternative to classical oxidation methods
used in industry.
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