| 摘要 |
NEW MATERIAL:A compound shown by formula I (n is 2-5; A is group shown by formula III; B is group shown by formula III; R<1> is alkyl; R<2> to R<5> are H, alkyl or alkoxy; R<6> is alkyl or alkoxy and at least one of R<2> to R<6> is alkoxy). EXAMPLE:1-(1,2-Dimethyl-3-indolyl))-2-(2-cyano-3-methoxy-5- methylthienyl)-3,3,4,4,5,5-hexafluorocyclopentene. USE:Having photochromic properties, suitable for light recording material, etc. PREPARATION:An indole derivative shown by the formula IV (X<1> is Br or I) is reacted with a thiophene derivative shown by formula V (X<2> is Br or I) and a lithio forming agent such as butyllithium to give an aryllithio substance. This substance is reacted with a perfluoroalkene compound shown by formula VI. |
