| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a photochromic compound which forms a coloring body structure by ultraviolet irradiation and a decoloring body by visible-light irradiation. <P>SOLUTION: The photochromic compound is represented by general formula (I) [R<SB>1</SB>, R<SB>2</SB>, R<SB>3</SB>and R<SB>4</SB>are each a halogen, an alkyl group, an alkoxy group, an aryloxy group, an allyl group, an aralkyl group, a pyrryl group, an amino group, a furyl group, a thienyl group, a thiazolyl group, an oxazolyl group, a cyano group, a nitro group, an ester group or a trifluoromethyl group; X is oxygen or an N-R<SB>5</SB>group (R<SB>5</SB>is hydrogen, an alkyl group, an allyl group, an aryl group or an aralkyl group)]. <P>COPYRIGHT: (C)2004,JPO |
