Process for the preparation of 1-aminonaphthalene-2,4,7-trisulph

Details Process for the preparation of 1-aminonaphthalene-2,4,7-trisulph Process for the preparation of 1-aminonaphthalene-2,4,7-trisulph

1988-10-04

1989-10-10

Chan, Nicky

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

Organic compounds

Sulfonic acids or salts thereof

C07C14360

Patent

active

048730262

ABSTRACT:
New process for the preparation of 1-aminonaphthalene-2,4,7-trisulphonic acid and, if appropriate, 1,7-Cleve's acid, in which 1-nitronaphthalene is reacted by the Piria method with bisulphites in a manner which is known per se, the sulphamate mixture obtained in this Piria reaction is sulphonated with sulphur trioxide in sulphuric acid to give 1-aminonaphthalene-2,4,7-trisulphonic acid and, if appropriate, this is hydrolysed to 1,7-Cleve's acid by heating in aqueous sulphuric acid.

REFERENCES:
Donaldson, "The Chemistry and Technology of Naphthalene Compounds", Edward Arnold (Publishers) Ltd., 1958, pp. 184-191, 198-199 and 208-209.

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