93296-62-9Relevant academic research and scientific papers
An efficient synthesis of N-substituted phthalimides using SiO2-tpy-Nb as heterogeneous and reusable catalyst
Wan, Li,Sun, Xiaoning,Shi, Songjie,Zhang, Jiawei,Li, Xin,Li, Zhenjiang,Guo, Kai
, p. 30 - 34 (2016/09/28)
A novel and efficient heterogeneous catalyst SiO2-tpy-Nb was developed, and its application in the preparation of N-substituted phthalimides from o-phthalic acids or anhydrides with amines provides the desired products in good to excellent yields. The catalyst was stable and recoverable for eight consecutive cycles without a significant loss in its activity. Furthermore, the catalyst is applicable in continuous flow which indicates its potential utilization in industrialization.
Process for the preparation of eight fluorine substituted phthalocyanine
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, (2017/04/07)
The invention relates to a method for preparing octafluoro-substituted phthalocyanine. According to the method, easily available 4,5-dichlorophthalic acid serving as a raw material is subjected to five-step reactions, namely acetic anhydride dehydration, aniline imidization, potassium fluoride fluorination, hydrolysis and one-step condensation to obtain a target product, namely an octafluoro-substituted phthalocyanine compound. The method has the advantages of low raw material cost, mild reaction condition, safe experiment operation, simple post-treatment, relatively high target product yield, high purity and the like. A novel method is provided to preparation for synthesizing octafluoro-substituted phthalocyanine compounds, synthesis researches of octafluoro-substituted phthalocyanine compounds are promoted, and more possibility is provided to application of the octafluoro-substituted phthalocyanine compounds serving as semiconductor materials in researches of dye-sensitized solar cells, organic thin-film transistors and other aspects. The method can be easily industrialized, and the obtained product has high purity and stable quality.
Cyclic imides; 15. Reaction of 4,5-dichlorophthalimides with potassium nitrite: Synthesis of 4-hydroxy-nitrophthalimides
Caswell,Guevara,Corley,Martinez,Hollis,Largess,Thornley
, p. 823 - 825 (2007/10/02)
N-Substituted 4,5-dichlorophthalimides react with potassium nitrite in refluxing dimethylformamide to form N-substituted 4-hydroxy-5-nitrophthalimides.
