| abstract |
PCT No. PCT/JP97/03536 Sec. 371 Date Mar. 26, 1999 Sec. 102(e) Date Mar. 26, 1999 PCT Filed Oct. 3, 1997 PCT Pub. No. WO98/14423 PCT Pub. Date Apr. 6, 1998The present invention provides an aminomethylene derivative represented by general formula (I): wherein A is a cyclic oxo group selected from the group consisting of following general formulae (a), (b), (c), (d) and (e): wherein R1, R2, R3, R4 and R5 each independently represent H, an alkyl group or the like; R6, R7 and R8 each independently represent an alkyl group or the like; R1 and R2 or R7 and R8 may combine with each other to form a tetramethylene group or the like; R represents an alkyl group optionally containing OH or O; and n is an integer of 0 to 4, a process for the same, and the use thereof. The derivatives have an excellent ultraviolet absorption ability and a high optical stability. |