Methine dyes having a pyridyl group and a pyridyl or a quinoliny

Details Methine dyes having a pyridyl group and a pyridyl or a quinoliny Methine dyes having a pyridyl group and a pyridyl or a quinoliny

1988-03-24

1989-10-24

Nigel, Floyd D.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546255, 546264, 546330, 546177, 564178, 564180, C07D40106

Patent

active

048763470

ABSTRACT:
Methine dyes (I) which conform in one of their tautomeric forms to the general formula ##STR1## where Y.sup.1 is in both or either case an electron-attracting group and the other Y.sup.1 is hydrogen,

REFERENCES:
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patent: 2345094 (1944-03-01), Brooker et al.
patent: 2393743 (1946-01-01), Brooker et al.
patent: 2624735 (1953-01-01), Goldberg et al.
patent: 2624738 (1953-01-01), Goldberg et al.
patent: 2951841 (1960-09-01), Wilson
patent: 2953561 (1960-09-01), Doorenbos
patent: 3268522 (1966-08-01), Schenck
patent: 3311618 (1967-03-01), Heseltine et al.
patent: 3639127 (1972-02-01), Brooker et al.
Takahashi, J. Pharm. Soc. (Japan), vol. 72, pp. 46 to 51 (1952).

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