Ultraviolet ray absorbing agent

Details Ultraviolet ray absorbing agent Ultraviolet ray absorbing agent

1988-02-16

1989-07-25

Chan, Nicky

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31900

Patent

active

048515515

ABSTRACT:
An ultraviolet ray absorbing agent comprising as an active ingredient a spiro compound having a spiro ring structure in the molecule, said spiro compound being represented by the general formula ##STR1## wherein, Y is ##STR2## A is ##STR3## R.sub.1 is hydrogen, halogen, lower alkyl of 1 to 4 carbon atoms, lower alkoxyl of 1 to 4 carbon atoms, carboxyl, or sulfo, R.sub.2 is hydrogen or alkyl of 1 to 12 carbon atoms, R.sub.3 and R.sub.4 are alkyls of 1 to 12 carbon atoms, X is methylene, oxygen, imino, sulfur, sulfinyl, or sulfonyl, and n is an integer of 1 to 12.

REFERENCES:
patent: 3766205 (1973-10-01), Heller et al.
patent: 3948946 (1976-04-01), Hofer et al.
patent: 4013619 (1977-03-01), Schmidt
patent: 4414393 (1983-11-01), Dexter et al.
patent: 4511491 (1985-04-01), Ishii et al.
patent: 4530844 (1985-07-01), Smerbeck et al.
patent: 4769479 (1988-09-01), Sasaki et al.

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