C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/388, 8/52, 2
C07D 407/04 (2006.01) C07D 235/04 (2006.01) C07D 493/04 (2006.01)
Patent
CA 1099727
Abstract of the Disclosure Novel benzofuranyl benzimidazoles of the formula Image , wherein R1 represents a hydrogen atom, an alkenyloxy or cyclo- alkyloxy radical, an unsubstituted or substituted alkoxy, phenylalkoxy or phenoxy radical, each of R2 and R3 independently represents a hydrogen atom, an alkyl or alkoxy radical, a halogen atom, or, if R1 repre- sents hydrogen, together in the ortho-position to - 1 - each other they represent a radical of the formula -CH=CH-CH=CH-, -O-CH2-O- or O-CH2-CH2-O-, R4 represents a hydrogen atom, an alkyl, alkoxy or phenyl radical, R5 represents a sulpho or carboxyl group or the functional derivatives thereof including the cyano group or the trifluoromethyl group, R6 represents a hydrogen or halogen atom, an alkyl or alkoxy radical, R7 represents a cycloalkyl, alkenyl, or unsubstituted or substituted alkyl, phenyl or phenylalkyl radical, or, if n is 0, also represents a hydrogen atom, R8 represents a hydrogen atom, a cycloalkyl, alkenyl, or unsubstituted or substituted alkyl or phenylalkyl radical, Aw? represents a colourless anion of an inorganic or organic acid and w represents the valency of the anion A, and n is 0 or 1, their preparation as well as their use as optical brighteners are disclosed.
283359
Meyer Hans R.
Weber Kurt
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
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