Zincperchloratehexahydrate, Zn(ClO4)2⋅6H2O, efficientlycatalyses the esterification between nearly equimolar amounts of carboxylicacids and alcohols. The reaction works under solvent-free conditions at relatively low temperatures. Excellent results were obtained with a wide range of substrates.
Azomethine dye precursor, image-forming material, and image-forming method
申请人:——
公开号:US20010019806A1
公开(公告)日:2001-09-06
The present invention related to an azomethine dye precursor represented by the following general formula (1) and the image-forming material and image-forming method using the azomethine dye precursor: wherein Ar represents an aryl group or a heterocyclic group which may each have a substituent; X represents a bivalent group linking a carbon atom and a nitrogen atom; and Cp represent a coupler residue which may or may not form a ring.
General formula
1
本发明涉及由以下通式(1)表示的偶氮亚甲基染料前体以及使用该偶氮亚甲基染料前体的成象材料和成象方法: 其中 Ar 代表芳基或杂环基,它们可以各自具有一个取代基;X 代表连接碳原子和氮原子的二价基团;Cp 代表耦合剂残基,它可以形成环,也可以不形成环。
通式
1