Benzofuran dyes

Details Benzofuran dyes Benzofuran dyes

1989-10-13

1990-08-14

Sutto, Anton H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549414, 549467, C07D30782

Patent

active

049488953

ABSTRACT:
A 6-tertiary amino-2-(Z.dbd.CH--)benzofuran dye is disclosed, where Z represents the atoms providing an electron withdrawing group and a conjugated methine linkage completing a resonant dye chromophore including the 6-tertiary amino group as an electron donor and the electron withdrawing group as an electron acceptor. The dyes are formed by condensing a 6-tertiary amino-2-formylbenzofuran with an electron withdrawing dye nucleus precursor containing an active methyl or methylene site. The dyes exhibit bathochromically shifted absorption peaks.

REFERENCES:
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patent: 3932446 (1976-01-01), Grychtol
patent: 4278751 (1981-07-01), Specht et al.
patent: 4668803 (1987-05-01), Berman et al.
patent: 4736032 (1988-04-01), Fox et al.
patent: 4743528 (1988-05-01), Farid et al.
patent: 4743529 (1988-05-01), Farid et al.
patent: 4743530 (1988-05-01), Farid et al.
patent: 4743531 (1988-05-01), Farid et al.
Soo et al., "Sur Quelq. Prop. Formyl-21-Benzofuran", Bull. Soc. Chim. France, pp. 1875-1877 (1962).

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