Ring transformations of heterocyclic compounds.<b>XXII</b>. Pyrido[1,2-<i>a</i>]indolium salts from 2-methyl-3<i>H</i>-indoles by pyrylium mediated three carbon annelation
作者:Thomas Zimmermann、Lothar Hennig
DOI:10.1002/jhet.5570390203
日期:2002.3
The synthesis of pyrido[1,2-a]indolium perchlorates 8,11 from 2,4,6-triarylpyrylium perchlorates 1 and 2-methyl-3H-indoles 6,9 in the presence of a basic condensing agent (anhydrous sodium acetate, piperidine acetate, triethylamine/acetic acid, triethylamine) in ethanol by a 2,4-[C3+C2N] pyryliumringtransformation is reported. Spectroscopic data of the transformation products and their mode of formation
吡啶并合成[1,2一]吲哚鎓高氯酸盐-8,11-从2,4,6-三芳基高氯酸盐1和2-甲基-3- ħ -indoles 6,9在碱性缩合剂的存在下(无水醋酸钠报道了乙醇中乙酸哌啶,三乙胺/乙酸,三乙胺通过2,4- [C 3 + C 2 N]吡啶鎓环的转化。讨论了转化产物的光谱数据及其形成方式。
Quaternization of N‐Heterocycles with Propylene Oxide and Epichlorohydrin
Abstract Several novel important heterocyclic N‐2‐hydroxypropyl and N‐2‐hydroxy‐3‐chloropropyl quaternary salts were prepared by reaction of propylene oxide and epichlorohydrin with the appropriate heterocyclic bases in the presence of perchloric or hydrobromic acid, giving pure compounds without colored by‐products. The reaction products have an activated methyl group in 2‐ or 4‐position and are typical
Structure and spectral property of 8-(2-(5-(4-methylphenyl)-2-thienyl)vinyl)-10,10-dimethyl-10H-pyrido[1,2-a]indolium perchlorate
作者:Lin Jiang、Peng Cao、Yulei Zhang、Xiezhong Xie
DOI:10.1007/s11164-012-0539-4
日期:2012.11
10-dimethyl-10H-pyrido[1,2-a]indolium perchlorate (3) has been synthesized by cycloaddition and condensation reactions, and characterized by elemental analysis, IR, 1H NMR, and single-crystal X-ray diffraction. The crystalstructure analysis exhibits that the molecule of 3 possesses good coplanarity, and the three rings (10H-pyrido[1,2-a]indolium, thienyl and phenyl) and vinyl moiety can make up a large
合成了标题化合物8-(2-(5-(4-(甲基苯基)-2-噻吩基)乙烯基)l,10,10-二甲基-10 H-吡啶基[1,2- a ]高氯酸吲哚鎓(3)通过环加成和缩合反应,并通过元素分析,IR,1 H NMR和单晶X射线衍射进行表征。晶体结构分析表明3的分子具有良好的共面性,并且具有三个环(10 H -pyrido [1,2- a吲哚,噻吩基和苯基)和乙烯基部分可组成一个大的共轭体系。测量了其UV-Vis和荧光光谱,发现与8-(4-甲基苯基)乙烯基类似物相比,其显示出更大的最大吸收和发射波长。
Fibers and fabrics containing optical brightening agents
申请人:Eastman Kodak Company
公开号:US03983288A1
公开(公告)日:1976-09-28
Quaternary salts having a pyrido-[1,2-a]-indole nucleus are useful optical brightening agents for synthetic and natural fibers and fabrics. The quaternary salts are especially useful optical brighteners for paper and acrylic fibers.