Patent number: 6235457
Abstract: An arylidene compound is represented by the formula (I).
Each of L1 and L2 independently is a divalent aliphatic group, a divalent aromatic group or a divalent heterocyclic group. L3 is trimethine, pentamethine or heptamethine. Y is ═O, ═S or ═N—R10. R1 is hydrogen, a halogen atom, cyano, nitro, an aliphatic group, an aromatic group, a heterocyclic group, —O—R11, —S—R12, —CO—O—R13, —O—CO—R14, —NR15R16, —CO—NR17R18, —SO2—R19 or —SO2—NR20R21. Each of R2, R3, R6 and R7 independently is hydrogen, a halogen atom, cyano, an aliphatic group, an aromatic group, —O—R22, —CO—R23, —CO—O—R24, —NR25R26, —NHCO—R27, —NH—CO—O—R28, —SO2—R29 or —NH—SO2—R30.
Type:
Grant
Filed:
February 7, 2000
Date of Patent:
May 22, 2001
Assignee:
Fuji Photo Film Co., Ltd
Inventors:
Keizo Kimura, Masashi Ogiyama, Yoshiharu Yabuki, Toshio Kawagishi, Takeshi Nakamine, Yuki Mizukawa