NAPHTHOLACTAMFARBSTOFFE UND DIESE ETHALTENDES OPTISCHES AUFZEICHNUNGSMEDIUM.

摘要

Naphtholactam dyestuffs are (a) symmetrical bis-benz(cd)indole-2 tri- to nona-methin cyanine salts of formula (Ia) (where R1 and R3 = (substd.) 1-20C alkyl, opt. with 0 atoms in the chain, (substd.) 5-7C cycloalkyl or (substd.) phenyl; R2, R4 and R5 = H, (substd.) 1-6C alkyl, (substd.) 5-6C cycloalkyl, (substd.) phenyl, 1-6C alkoxycarbonyl, 1-6C carboxyalkyl, OH, 1-4C alkoxy or halogen; n = 0 or 1; p = 0, 1 or 2; Z1 and Z2 = H or, if n = 1, together may = a 2-3C alkylene chain, opt. substd. by 1-4C alkyl, or one or 2 carbonyl gps.; (-) = an anion; rings A, B, C and D may be substd. or benzo-anellated; excepted cpds. are such that: n and p not both = 0 if rings A, B, C and/or D are unsubstd. or substd. by halogen, 1-4C alkoxy, 1-4C mono- or dialkylamino or NO2, R2 not = H if n = 1, p = 0 and Z1 and Z2 both = H; at least one of R2, R4 and R5 not = H if n = 1, p = 1 and Z1 and Z2 both = H.)