Divinyl compounds represented by the formula (I):
wherein A represents
X¹ represents an alkyl group, an alkoxy group, an alkoxy-alkoxy group, an aryloxy group, a cycloalkoxy group, a haloalkoxy group, an alkenyloxy group, an aralkyloxy group or a halogen atom; X² represents a halogen atom; X³ represents an alkyl group of not more than 8 carbon atoms, an alkoxy group of not more than 8 carbon atoms or a halogen atom; R¹ represents a heterocyclic ring having a nitrogen atom; R² and R³ each represents an alkyl group, an alkoxyalkyl group or a haloalkyl group; and m and n each represents 0, l, 2 or 3; wherein each X¹ or each X³ is the same or different when n or m respectively is 2 or 3 and each X² is the same or different; are chromogenic agents useful for recording materials such as pressure- and heat-sensitive papers.
由式(I)代表的二
乙烯基化合物:
其中 A 代表
X¹ 代表烷基、烷氧基、烷氧基烷基、芳氧基、环烷氧基、卤代烷氧基、烯氧基、芳氧基或卤素原子; X² 代表卤素原子; X³ 代表不超过 8 个碳原子的烷基、不超过 8 个碳原子的烷氧基或卤素原子; R¹ 代表具有氮原子的杂环;其中,当 n 或 m 分别为 2 或 3 时,每个 X¹ 或每个 X³ 相同或不同;当 n 或 m 分别为 2 或 3 时,每个 X² 相同或不同。