To provide a new diarylethene compound having excellent fading property in addition to durability to repeated use and useful for an organic photochromic film, etc.
The objective diarylethene compound is expressed by formula I [(n) is 2-5; A is group of formula II (R1 is an alkyl; R2 is an alkyl or cyano)], e.g. 1,2-bis(1,3,5-trimethyl-2-phenyl)hexafluorocyclopentene. The compound can be produced by reacting a perfluorocyclopentene of formula III with a lithiated phenyl derivative of formula IV for about 10-40 min in a reaction solvent consisting of an other solvent such as tetrahydrofuran dehydrated with metallic sodium, etc., while keeping the temperature of the system to -100 to -60°C and terminating the reaction by adding methanol after the complete consumption of the compound of formula IV.
IZUMOTO MASAHIRO
HAYASHI SHIGEHIKO
KURODA KOTARO
UCHIDA KINGO
IRIE MASAHIRO
UCHIDA KINGO
IRIE MASAHIRO
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