Spiro-oxazine compounds and preparation thereof and photochromic shaped article
AssigneeToray Industries, Inc.
InventorsShinichi Yamamoto, Takashi Taniguchi
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Abstract
A novel spiro-oxazine compound of the formula (A): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent hydrogen, (C1 or 2) alkyl, halogenated (C1 or 2) alkyl, (C1 or 2) alkoxy, halogen or nitro, R is unsubstituted or substituted phenyl or naphthyl, and n is 1 to 5. The spiro-oxazine compound is prepared by reacting a precursor of the spiro-oxazine compound of the formula (A), which has a substituent of the formula: --(CH.sub.2).sub.n R in the nitrogen atom of the indoline nucleus, with an .alpha.-nitroso-.beta.-naphthol. The spiro-oxazine compound is valuable as a photochromic material and exhibits enhanced fatigue resistance in photocolorability.
Claims13
A spiro-oxazine compound represented by the following general formula (A):
- ##STR9## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent a hydrogen atom or a substituent selected from the group consisting of an alkyl group having 1 or 2 carbon atoms, a halogenated alkyl group having 1 or 2 carbon atoms, an alkoxy group having 1 or 2 carbon atoms, a halogen atom and a nitro group, R represents an unsubstituted or substituted phenyl or naphthyl group, and n is an integer of from 1 to 5.
A shaped article comprising an optically transparent material and a spiro-oxazine compound represented by the following general formula (A):
- ##STR10## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 independently represent a hydrogen atom or a substituent selected from the group consisting of an alkyl group having 1 or 2 carbon atoms, a halogenated alkyl group having 1 or 2 carbon atoms, an alkoxy group having 1 or 2 carbon atoms, a halogen atom and a nitro group, R represents an unsubstituted or substituted phenyl or naphthyl group, and n is an integer of from 1 to 5.
Dependencies are inferred from the claim text.