C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/396, 204/43.
C07C 201/12 (2006.01) C07C 205/46 (2006.01) C25B 3/02 (2006.01)
Patent
CA 1284650
Process for the preparation of 5-nitro-1,4-naphthoquinone Abstract of the Disclosure A process for the preparation of 5-nitro-1,4-naphthoquinones of formula Image wherein R is hydrogen, a C1-C4alkyl radical or a C1-C4alkoxy radical, by oxidation of 1-nitronaphthalene or a suitably substi- tuted 1-nitronaphthalene, which process comprises carrying out the reaction with manganese(III) sulfate as oxidising agent. The manganese(III) sulfate consumed can be regenerated electro- lytically with good current yield. The process is environmentally safe, as the oxidising agent and the solvent, if any, can be reused.
534630
Comninellis Christos
Osterwalder Robert U.
Plattner Eric
Seifert Gottfried
Ciba-Geigy Investments Ltd.
Comninellis Christos
Fetherstonhaugh & Co.
Osterwalder Robert U.
Plattner Eric
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