2H-CHROMENES ANNELATED AT C5-C6 AND METHODS OF MAKING AND USING THEREOF
申请人:Das Suresh
公开号:US20100056810A1
公开(公告)日:2010-03-04
Described herein are C
5
-C
6
annelated naphthopyrans that possess at least one electron-withdrawing group. The compounds possess desirable properties such as increased fading kinetics. Also described herein are new methods for synthesizing 2H-chromenes annelated at C
5
-C
6
. The methods involve less stringent reaction conditions as well as provide increased reaction yields. The methods permit the synthesis of a wide variety of substituted naphthopyrans that can be temperature sensitive, which was not possible with previous synthetic routes.
Photochromic 2h-chromenes annelated at c5-c6 and their methods of preparation
申请人:Corning Incorporated
公开号:EP2786991A3
公开(公告)日:2014-11-12
Described herein are C5-C6 annelated naphthopyrans that possess at least one electron-withdrawing group. The compounds possess desirable properties such as increased fading kinetics. Also described herein are new methods for synthesizing 2H-chromenes annelated at C5-C6. The methods involve less stringent reaction conditions as well as provide increased reaction yields. The methods permit the synthesis of a wide variety of substituted naphthopyrans that can be temperature sensitive, which was not possible with previous synthetic routes.