| abstract |
PROBLEM TO BE SOLVED: There is a problem that conventional photochromic compounds are not sufficient from the viewpoint of color development/erasing speed and durability, and have a large number of manufacturing steps. The present invention provides a photochromic compound that has both a high-speed color development reaction and a high durability and can be synthesized at low cost, and is industrially applicable. The compound of the present invention has a 1-position of a pyranoquinazoline (8H-pyrano[3,2-f]quinazoline) skeleton and a 10-position of a naphthopyran (3H-naphtho[2,1-b]pyran) skeleton. The present invention is characterized in that an etheric oxygen atom is bonded to a carbon atom, and that the compound has a photochromic property, and that a photochromic compound having both a high-speed color development reaction and high durability is realized. Furthermore, it provides a photochromic compound that can be synthesized at low cost and is more industrially applicable. [Selection diagram] None |