Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1997-02-14
1997-12-02
Ambrose, Michael G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
548461, 548462, 548473, 548476, 548478, 548480, 548513, C07D40314, C07D20948
Patent
active
056937970
ABSTRACT:
A process for the preparation of brominated phthalimides that involves mixing tetrabromophthalic anhydride, an organic acid, and an organic dispersing agent in water at approximately 110.degree. C. under 1 bar pressure is disclosed. An amine is added and the reaction mixture is stirred for six hours under approximately 5 bar pressure and heated at least to 120.degree. C. The reactant mass is washed in water and then methanol. The process decreases production time, increases whiteness and purity, and decreases yellowness and particle size of the resulting product.
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Ambrose Michael G.
Unitex Chemical Corporation
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