| 摘要 |
PURPOSE:To obtain a novel compound which has its maximum absorption wavelength at 400-500nm and shows high sensitivity to the light in this wavelength range and reverse photochromism useful for optical materials. CONSTITUTION:This spiropyran compound is expressed by formula I [R<1> is a 1-20C alkyl, an aralkyl, hydroxyethyl, acryloxyethyl; R<2> and R<4> are H, a 1-6C alkyl, an aryl, an aralkyl, a 1-5 C alkoxy, a halogen; R<3> and R<5> are H, a 1-6C alkyl, an aryl, an aralkyl; R<6> and R<7> are H, a 1-6C alkyl, an aryl, an aralkyl, a halogen; R<8> is H, vinyl, group-CH2OR<9> (R<9> is H, a l-4C alkyl); X is O, S] and its salt with an acidic compound, for example, 3,5-dimethyl-6'- nitrospiro[benzoselenazoline-2,2'(2'H)-1'-benzopyran]. The compound of formula I is obtained, for example, by condensation reaction of a benzo-selenazolenium salt derivative of formula II (Y is a halogen) with a 5-nitrosalicylaldehyde derivative of formula III. |
