Water-soluble fluorescing and lasing dyes

Details Water-soluble fluorescing and lasing dyes Water-soluble fluorescing and lasing dyes

1978-11-17

1980-04-29

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

26034343, 331 945L, C07D49104, C07D31116

Patent

active

042007534

ABSTRACT:
Compounds having the structures: ##STR1## wherein R is CH.sub.3 or CF.sub.3 and wherein R.sup.1 is H or CH.sub.3. compounds are prepared by a four step method involving (1) the formation of a benzylaminophenol or benzylaminohydroxypyridine, (2) the formation of a coumarin or azacoumarin, (3) sulfonation of the coumarin or azacoumarin and (4) neutralization of the sulfonate with sodium bicarbonate. The compounds are useful as water-soluble lasing dyes.

REFERENCES:
patent: Re23703 (1953-09-01), Ackermann
patent: 3927033 (1975-12-01), Hammond
patent: 4103256 (1978-07-01), Hammond et al.

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