Process for the preparation of 1-hydroxy-4-amino-5(8)-nitroanthr

Details Process for the preparation of 1-hydroxy-4-amino-5(8)-nitroanthr Process for the preparation of 1-hydroxy-4-amino-5(8)-nitroanthr

1982-06-16

1984-01-03

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 9726

Patent

active

044241607

ABSTRACT:
1-Hydroxy-4-amino-5- or -8-nitroanthraquinone is obtained in high yields and in high purity when 1,8-dinitroanthraquinone or 1,5-dinitroanthraquinone respectively is reacted below 80.degree. C. in oleum in the presence of boric acid with reducing agents. The products of the process are valuable polyester dyestuffs as well as dyestuff intermediate products.

REFERENCES:
patent: 2189012 (1940-02-01), Lord et al.
patent: 2653954 (1953-09-01), Weinmayr
patent: 3060200 (1962-10-01), Buecheler
patent: 4046785 (1977-09-01), Hirai et al.
patent: 4048199 (1977-09-01), Glser et al.
Barnett, Anthracene and Anthrapquinone, 1921, pp. 192-195, 222-225, 242-245 and 248-251, Von Nostrand Co., N.Y., N.Y.

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