Process for the preparation of benzimidazolylbenzofuranes

Details Process for the preparation of benzimidazolylbenzofuranes Process for the preparation of benzimidazolylbenzofuranes

1980-01-21

1981-05-19

Schwartz, Richard A.

Harness for working animal

542436, 548255, 548256, 548261, 548327, 548330, C07D40504, C07D40514

Patent

active

042686709

ABSTRACT:
Optical brighteners of the formula ##STR1## wherein the radicals R.sub.1 to R.sub.9 are substituents customary in brightener chemistry,

REFERENCES:
patent: 3864333 (1975-02-01), Sahm et al.
patent: 3940417 (1976-02-01), Schlaepfer
patent: 4143055 (1979-03-01), Occelli
patent: 4146725 (1979-03-01), Meyer et al.
Chemical Abstracts, 72:90167y (1970) [Bordin, F., et al., Gazz. Chim. Ital. 1969, 99(11), 1177-1192].
Seemuth, P., et al., J. Org. Chem., 43(15), 3063-3065 (1978).
Cagniant, P., et al., in Advances in Heterocyclic Chemistry, vol. 18 (Katritzky et al.-Editors), Academic Press, N.Y., 1975, p. 434.
Brooke, G., et al., J. Chem. Soc. (c), 580-584 (1968).

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