Photochromatic and thermochromatic spiro-oxazepin-oxazine compou

Details Photochromatic and thermochromatic spiro-oxazepin-oxazine compou Photochromatic and thermochromatic spiro-oxazepin-oxazine compou

1990-12-06

1991-10-08

Maples, John S.

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

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

252583, 252586, 252589, G02F 100, G02B 523, F21V 904, C07D22314

Patent

active

050555766

ABSTRACT:
New photochromatic and thermochromatic compounds of the spiro-oxazepin-oxazine class are definable by the general formula (I): ##STR1## where the substituents R and R.sub.1 -R.sub.12 are as defined in the description.
The process for the preparation of the compounds (I) is described, as is their use as photochromatic and thermochromatic agents.

REFERENCES:
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patent: 3562172 (1971-02-01), Hisatake Ono et al.
patent: 3578602 (1971-05-01), Hisatake Ono et al.
patent: 3876659 (1975-04-01), Houlihan et al.
patent: 4215010 (1980-07-01), Hovey et al.
patent: 4342668 (1982-08-01), Hovey et al.

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