Process for preparing a benzoxazinone

Details Process for preparing a benzoxazinone Process for preparing a benzoxazinone

2011-03-29

2011-03-29

Habte, Kahsay T (Department: 1624)

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

Organic compounds

Chalcogen in the nitrogen containing substituent

C544S093000, C544S094000

Reexamination Certificate

active

07915406

ABSTRACT:
The invention relates to a method for preparing a benzoxazinone comprising reacting an isatoic anhydride with an acylating compound in the presence of an N-alkyl imidazole, to a method for preparing a photo-stabilised composition, comprising adding a benzoxazinone and to the use of a benzoxazinone as a light-absorber or as a stabiliser for a light-sensitive compound.

REFERENCES:
patent: 3989698 (1976-11-01), Jacobs et al.
patent: 4446262 (1984-05-01), Okumura et al.
patent: 2003/0096889 (2003-05-01), Sarkar
patent: WO9322300 (1993-11-01), None

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