Method of producing alkali metal benzenesulfinates

Details Method of producing alkali metal benzenesulfinates Method of producing alkali metal benzenesulfinates

1987-08-12

1989-07-18

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfinic or sulfenic acids or salts thereof

568 28, 568 30, C07C14500

Patent

active

048491381

ABSTRACT:
A method of producing alkali metal benzenesulfinates having the general formula of ##STR1## wherein M represents Na or K, which comprises: reacting nitrophenylphenyl sulfones having the general formula of ##STR2## wherein n is an integer of 1 or 2, with alkali metal thiophenolates having the general formula of ##STR3## in solvents. The reaction produces also nitrophenylphenyl sulfides as by-products in equimolar amounts to the alkali metal benzenesulfinates, and the oxidation of the sulfides provides the starting nitrophenylphenyl sulfones.
A method of producing the nitrophenylphenyl sulfones is also provided wherein the sulfides are oxidized with hydrogen peroxide in the presence both of water-soluble tungstates or molybdates and of phase transfer catalysts in a two-phase heterogeneous solvent.

REFERENCES:
patent: 3006963 (1961-10-01), Buc

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