Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent
Patent
1987-06-01
1989-05-16
Raymond, Richard L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Chalcogen in the nitrogen containing substituent
540552, 544 73, 544 74, 544 95, C07D26536
Patent
active
048311413
ABSTRACT:
The invention relates to chromogenic 3,1-benzoxazines of the formula ##STR1## wherein X.sup.1 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl, chlorine or OY.sup.1,
REFERENCES:
patent: 4070508 (1978-01-01), Ishige et al.
patent: 4074050 (1978-02-01), Ozutsumi et al.
patent: 4727140 (1988-02-01), Meisel et al.
patent: 4754034 (1988-06-01), Berneth et al.
Chemical Abstracts, Band 70, 1969, Seite 341, Zusammenfassung Nr. 47472r, Columbus, Ohio, U.S.; SA-A-67 06 887 (Farbwerke Hoechst A.-G.) 10-04-1968.
Berneth Horst
Jabs Gert
Bayer Aktiengesellschaft
Raymond Richard L.
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