Photochromic compound, photochromic composition, photochromic article and spectacles
AssigneeHoya Lens Thailand Ltd.
InventorsHironori KAWAKAMI, Kei KOBAYASHI
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Abstract
A photochromic compound represented by General Formula 1 is provided. In General Formula 1, A represents a ring structure having 3 or more carbon atoms constituting a ring including the carbon atom at position 13 of indeno-fused naphthopyran, R1 to R8 each independently represent a hydrogen atom or a substituent, provided that at least one of R2 and R3 represents an electron-donating group, and B and B′ each independently represent a substituent.
Claims24
A photochromic compound represented by the following General Formula 1:
- (in General Formula 1,
- A represents a ring structure having 3 or more carbon atoms constituting a ring including the carbon atom at position 13 of indeno-fused naphthopyran,
- R1 to R8 each independently represent a hydrogen atom or a substituent, provided that at least one of R2 and R3 represents an electron-donating group, and
- B and B′ each independently represent a substituent).
3-6. (canceled)
(canceled)
10-11. (canceled)
13-14. (canceled)
16-17. (canceled)
19-20. (canceled)
(canceled)
(canceled)
(canceled)
Dependencies are inferred from the claim text.