设计了一系列基于[1,2,5]恶二唑并[3,4- b ]吡嗪吸电子基团的D-π-A发色团。通过循环伏安法,紫外-可见光谱和发射光谱研究了π共轭连接基(1,4-亚苯基和2,5-亚噻吩基)和氨基给电子基团(二苯基氨基和咔唑-9-基)的影响。 。还使用电场感应二次谐波产生(EFISH)方法研究了二阶非线性光学性质。实验结果已经通过理论DFT计算得到了合理化。
Direct arylalkenylation of furazano[3,4-b]pyrazines via a new C–H functionalization protocol
作者:Nikita A. Kazin、Yuriy A. Kvashnin、Roman A. Irgashev、Wim Dehaen、Gennady L. Rusinov、Valery N. Charushin
DOI:10.1016/j.tetlet.2015.02.091
日期:2015.4
6-Styryl-5-(het)arylfurazano[3,4-b]pyrazines have been obtained by novel C-H functionalization, which is a particular case of the nucleophilic substitution of hydrogen (S-N(H)). The process is initiated by the Michael addition of morpholine at the C=C double bond of beta-nitrostyrenes, and the subsequent addition of the generated carbanion to C-6 of 5-(het)arylfurazano[3,4-b]pyrazines, followed by elimination of nitrous acid and morpholine. It has been shown that in this case, only beta-nitrostyrenes bearing electron-rich substituents on the aromatic ring are involved in arylalkenylation of furazano[3,4-b]pyrazines. (C) 2015 Elsevier Ltd. All rights reserved.
EREMEEV A. V.; ANDRIANOV V. G.; PISKUNOVA I. P., XIMIYA GETEROTSIKL. SOEDIN., 1978, HO 5, 613-615
作者:EREMEEV A. V.、 ANDRIANOV V. G.、 PISKUNOVA I. P.