Photochromic compounds (7)

US5801243A · kind A · utility

Assignee

• Optische Werke G. Rodenstock · DE

Inventors

• Manfred Melzig · Weßling, DE
• Herbert Zinner · Pentling, DE

Key dates

• Filing date: Feb 27, 1995
• Grant date: Sep 1, 1998
• Expiry date: Feb 27, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C1/685
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Disclosed are photochromic oxazine compounds, yielded by means of condensation of an aldehyde bearing in the .alpha.-position to the aldehyde group a halogen or hydroxy group (reacting agent 1), with (substituted) ortho-aminohydroxy aromatic compounds (reacting agent 2).