62448-61-7Relevant academic research and scientific papers
Approach to the Synthesis of Unsymmetrical/Symmetrical Maleimides via Desulfitative Arylation at Different Temperatures
Abbasnia, Masoumeh,Sheykhan, Mehdi,Ghaffari, Tahereh,Safari, Elham
, p. 11688 - 11698 (2020/10/23)
New routes toward selective synthesis of both mono-and diaryl maleimides have been innovated. The mere requirement to this end is through the increase of temperature. The method works effectively for maleic anhydride and maleic acid as well. Also, the fir
Synthesis and fluorescent properties of model compounds for conjugated polymer containing maleimide units at the main chain
Onimura, Kenjiro,Matsushima, Mieko,Nakamura, Munetoshi,Tominaga, Tatsuya,Yamabuki, Kazuhiro,Oishi, Tsutomu
, p. 3550 - 3558 (2012/05/19)
2,3-Diaryl substituted maleimides as model compounds of conjugated maleimide polymers [poly(RMI-alt-Ar) and poly(RMI-co-Ar)] were synthesized from 2,3-dibromo-N-substituted maleimide (DBrRMI) [R= cyclohexyl (DBrCHMI) and n-hexyl (DBrHMI)] and aryl boronic acid using palladium catalysts. To clarify structures of conjugated polymer containing maleimide units at the main chain, 13C NMR spectra of 2-aryl or 2,3-diaryl substituted maleimides were compared with those of N-substituted maleimide polymers. Copolymers obtained with DBrRMI via Suzuki-Miyaura cross-coupling polymerizations or Yamamoto coupling polymerizations were dehalogenated structures at the terminal end. This dehalogenation may contribute to the low polymerizability of DBrRMIs. On the other hand, the π-conjugated compounds showed high solubility in common organic solvents. The N-substituents of maleimide cannot significantly affect the photoluminescence spectra of 2,3-diaryl substituted maleimides derivatives. The fluorescence spectra of poly(RMI-alt-Ar) and poly(RMI-co-Ar) varied with N-substituents of the maleimide ring. When exposed to ultraviolet light of wavelength 352 nm, a series of 1,4-phenylene- and/or 2,5-thienylene-based copolymers containing N-substituted maleimide derivatives fluoresced in a yellow to blue color. It was found that photoluminescence emissions and electronic state of π-conjugated maleimide derivatives were controlled by aryl- and N-substituents, and maleimide sequences of copolymers.
