Spiro-oxazine compounds and preparation thereof and...

Details Spiro-oxazine compounds and preparation thereof and... Spiro-oxazine compounds and preparation thereof and...

C - Chemistry, Metallurgy

07

D

96/174, 260/246.

C07D 498/10 (2006.01) G02C 7/04 (2006.01) G03C 1/685 (2006.01)

Patent

CA 1246565

SPIRO-OXAZINE COMPOUNDS AND PREPARATION THEREOF AND PHOTOCHROMIC SHAPED ARTICLE ABSTRACT OF THE DISCLOSURE A novel spiro-oxazine compound of the formula (A): Image (A) wherein R1, R2, R3, R4, R5, R6 and R7 independ- ently represent hydrogen, (C1 or 2) alkyl, halogenated (C1 or 21 alkyl, (C1 or 2) alkoxy, halogen or nitro, R is unsubstituted or sub- stituted 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: Image in the nitrogen atom of the indoline nucleus, with an a-nitroso-.beta.-naphthol. The spiro-oxazine compound is valuable as a photochromic material and exhibits enhanced fatigue resistance in photocolorability.

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