Photochromic spiropyran compounds

Details Photochromic spiropyran compounds Photochromic spiropyran compounds

1992-04-14

1993-08-31

Shah, Mukund J.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D491107

Patent

active

052410757

ABSTRACT:
Novel photochromic spiropyran compounds having an absorption sensitivity in a longer wavelength region than known photochromic compounds are provided. The novel spiropyran compounds have a spiropyran skeleton having a methoxy group at the 6 position, a nitro group at the 8 position, a bromine atom at the 5' and 7' positions, and an alkyl group at the 1' position.

REFERENCES:
patent: 3933509 (1976-01-01), Noguchi et al.
Patent Abstracts of Japan vol. 13, No. 15 (C-559)(3363) Jan. 13, 1989, & JP-A-63 221192 (Sony Corp.) Sep. 14, 1988.

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