Heterocycle substituted fulgides photochromic material and its synthesis process

Application Number  00128274 Application Date  2000.12.13
Publication Number  1357594 Publication Date  2002.07.10
Priority Information    
Applicant(s) Name  Inst. of Photochemistry, Chinese Academy of Sciences  
Inventor(s) Name  Fan Meigong;Wang Congmin;Zhao Lihua  
Patent Agency Code  31002 Patent Agent  li bai
AbstractThe present invention belongs to the field of photochromism, light data storing and light signal converting material technology. The heterocycle substituted fulgenic anhydride photochromism material is synthesized through the processes of mixing diacid and dicyclohexyl carbodiimide in the molar ratio of 0.5-1 in anhydrous tetrahydrofuran solvent through lightproof stirring for 5-24 hr; filtering to eliminate white precipitate 1,3-dicyclohexyl urea; decompressing to eliminate solvent; and silica column separation with chloroform and petroleum in the ratio of 1:1 for 4:1 as eluent. The present invention has high yield.