Imidoyl radicals 4a-d, obtained by hydrogen abstraction from imines 1a-d, give 7-membered cyclisation leading to oxazapines 2a-d. The intermediate spirocyclohexadienyl radicals of the competitive 6-membered ring closure (6a-d) rearrange to aryloxy radicals, giving benzophenones 3a-d: the whole process entails a novel 1,5-aryl radical translocation from an oxygen to a carbon atom.
Monomer containing electron-withdrawing group and electron-donative group, and copolymer and proton-conductive membrane comprising same
申请人:JSR Corporation
公开号:EP1245554A1
公开(公告)日:2002-10-02
A monomer containing an electron-withdrawing group and an electron-donative group which can be easily controlled in the upper limit of the amount of a sulfonic acid , which impairs the mechanical properties of a copolymer, and can provide a sulfonated polymer that forms a proton-conductive membrane having a high proton conductivity over a wide temperature range, an excellent mechanical strength and an excellent proton conductivity and showing inhibited swelling in hot water and an aqueous solution of methanol, and a copolymer obtained from the monomer. A monomer containing an electron-withdrawing group and an electron-donative group represented by the following general formula (1) :
wherein Y represents a iodine atom, chlorine atom or bromine atom; X represents an electron-withdrawing group; B represents an electron-donative group; and Z represents an aryl group having a specific structure or a monovalent condensed ring hydrocarbon group such as naphthyl group.
一种含有一个抽电子基团和一个负电子基团的单体,该单体可以很容易地控制磺酸的用量上限,而磺酸会损害共聚物的机械性能,并可以提供一种磺化聚合物,该聚合物可以在很宽的温度范围内形成具有高质子传导性、优异的机械强度和优异的质子传导性的质子传导膜,并在热水和甲醇水溶液中表现出抑制溶胀的特性,以及由该单体得到的共聚物。一种单体,含有由下式通式(1)代表的一个电子吸收基团和一个电子疏导基团:
其中 Y 代表碘原子、氯原子或溴原子;X 代表抽电子基团;B 代表弃电子基团;Z 代表具有特定结构的芳基或一价缩合环烃基团,如萘基。
Polyarylene copolymers and proton-conductive membrane
申请人:JSR Corporation
公开号:EP1138712B1
公开(公告)日:2006-01-18
US6555626B2
申请人:——
公开号:US6555626B2
公开(公告)日:2003-04-29
Peroxydicarbonate-mediated oxidation of N-(ortho-aryloxyphenyl) and N-(ortho-arylaminophenyl)aldimines
作者:Rino Leardini、Hamish McNab、Daniele Nanni
DOI:10.1016/0040-4020(95)00769-5
日期:1995.10
the methyl group: this process entails the formation of carbamoyl radicals, which cyclise onto the carbon-nitrogen double bond, furnishing quinoxalinone derivatives, or loose carbonmonoxide to yield benzimidazoles through ring closure of aminyl radicals. A novel cyclisation of a nitrogen-centred radical onto a formamido group could account for the formation of a benzimidazolinone derivative.