H-annellated benzo[f]chromenes

Details H-annellated benzo[f]chromenes H-annellated benzo[f]chromenes

C - Chemistry, Metallurgy

07

D

C07D 311/78 (2006.01) C07D 311/94 (2006.01) C07D 493/04 (2006.01) C07D 493/06 (2006.01) C07D 498/04 (2006.01) C07D 498/06 (2006.01)

Patent

CA 2390770

The present invention relates to specific photochromic h-annellated benzo[f]chromene derivatives and their use in plastics of all types, especially for ophthalmic applications. In. particular, the present invention relates to photochromic compounds derived from benzo[f]chromenes, which in the open form have especially long-wave absorption maxima making it possible to obtain violet to blue tints when used in phototropic glasses.

La présente invention concerne des dérivés de benzo[f]chromène spécifiques, photochromes, h-annelés et leur utilisation dans des matières plastiques de tous types, notamment à des fins ophtalmologiques. Cette invention concerne en particulier des composés photochromes dérivés de benzo[f]chromènes qui présentent dans leur forme ouverte des maxima d'absorption à longueur d'onde particulièrement élevée, ce qui permet d'obtenir des tons de couleur du violet au bleu lors de l'utilisation dans des verres phototropes.

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