| abstract |
A thiophene compound having a phosphate group, for example, one represented by the formula [1]. The compound has high resistance to heat and oxidation and can be improved in solubility or dispersibility in various solvents.n n(In the formula, R 1 and R 2 each independently represents, e.g., hydrogen, halogeno, cyano, or phenyl optionally substituted by W; and R 3 to R 6 each independently represents -OR 7 , SR 8 , or -NR 9 2 , provided that R 7 to R 9 each independently represents hydrogen, C 1-10 alkyl, or phenyl optionally substituted by W and W represents halogeno, cyano, nitro, hydroxyl, mercapto, amino, formyl, carboxy, C 1-10 alkyl, etc.) |