Kanto Kagaku Kabushiki Kaisha

Takayoshi Suga

Jiro Abe

Masahiro Yoshida

Hiroyuki Ohno

Hiroaki Tamashita

Hiroto Nagasawa

Tomonobu Mizumo

Kazuhiko Tsutiya

Yuki Inagaki

A problem is presented in that conventional photochromic compounds cannot be considered adequate in terms of the colorizing/decolorizing rate and durability, and the production process therefore has many steps. The present invention provides an industrially applicable photochromic compound that has both a rapid colorizing/decolorizing reaction and high durability and can also be synthesized at a low cost. This compound is characterized in that etheric oxygen atoms are bonded to the carbon atoms at position 1 of a pyranoquinazoline (8H-pyrano[3,2-f]quinazoline) skeleton and position 10 of a naphthopyran (3H-naphtho[2,1-b]pyran) skeleton, said compound having photochromic properties and being a photochromic compound that has both a rapid colorizing/decolorizing reaction and high durability. Also provided is an industrially applicable photochromic compound that can be synthesized at a low cost.

Pyranoquinazoline derivatives and naphthopyran derivatives

In order to address the problems of conventional photochromic compounds, which are the insufficient coloring/discoloring speed and durability exhibited thereby and the large number of production steps, the present invention provides a photochromic compound that exhibits a high speed coloring/discoloring reaction and high durability while it is able to be synthesized in low cost, and that has industrial applicability. The compound of the present invention is characterized by the insertion of a diarylimidazolyl radical into the ortho position of an aryl group. The compound exhibits photochromic properties, and achieves a photochromic compound having both a high speed color switching reaction and high durability. Furthermore low cost synthesis is possible, and the photochromic compound has industrial applicability.

Pentaarylbiimidazole compound and production method for said compound

A novel imidazolium compound represented by the following general formula (I), which has an allyl group incorporated in the 3-position of the imidazolium ring. It needs no complicated operations for dissolution and has excellent handleability and a high ionic conductivity.

Imidazolium compound

Growing community of inventors

Tokyo, Japan

Takayoshi Suga