A greener, facile and scalable synthesis of indole derivatives in water: reactions of indole-2,3-diones with 1,2-difunctionalized benzene
作者:Renuka Jain、Kanti Sharma、Deepak Kumar
DOI:10.1016/j.tetlet.2012.09.013
日期:2012.11
An efficient, facile and greener protocol for the synthesis of indole derivatives viz., 3′H-spiro[indole-3,2′-[1,3]benzothiazole]-2(1H)-ones, 6H-indolo[2,3-b]quinoxalines and 3-(2-hydroxy-phenylimino)-1,3-dihydro-indol-2-ones, by the reactions of indole-2,3-diones with 1,2-difunctionalized benzene using tetrabutylammonium bromide (TBAB), as a surfactant under aqueous micellar media is described. This
6H-INDOLO[2,3-b]QUINOXALINE DERIVATIVES AND ORGANIC LIGHT EMITTING DIODE USING THE SAME
申请人:CHENG Chien-Hong
公开号:US20110303901A1
公开(公告)日:2011-12-15
A 6H-indolo[2,3-b]quinoxaline derivative has a structure of formula (I). R
9
is a member selected from the group consisted of an aryl group having one or more substituents and a heteroaryl group having one or more substituents, and R
1
to R
8
are substituents. The 6H-indolo[2,3-b]quinoxaline derivative of the present invention incorporates an indole and a quinoxaline group therefore inherits good energy transfer ability from indole and good electron-injection ability from quinoxaline. The compound of the present invention may function as a host material or a dopant in the light-emitting layer. In addition, the compound of the present invention may function as hole transport material, electron transport material, hole blocking material, electron blocking material, hole injecting material or electron injecting material.
Visible-Light Organophotoredox-Mediated [3 + 2] Cycloaddition of Arylcyclopropylamine with Structurally Diverse Olefins for the Construction of Cyclopentylamines and Spiro[4.<i>n</i>] Skeletons
作者:Zhengshan Luo、Bowen Cao、Tianhang Song、Zequn Xing、Jun Ren、Zhongwen Wang
DOI:10.1021/acs.joc.2c02061
日期:2022.11.18
We developed a visible-light-mediated [3 + 2] cycloaddition of arylcyclopropylamine with structurally diverse olefins using QXPT-NPh as a highly efficient organic photoredox catalyst. We first achieved the use of various alkyl-substituted alkenes in intermolecular [3 + 2] cycloadditions with cyclopropylamine. We also developed a general and efficient strategy for the construction of structurally diverse
Visible-light organophotoredox-mediated intermolecular formal [4 + 2] cycloadditions of arylcyclobutylamines with olefins
作者:Zhengshan Luo、Zequn Xing、Rui Gao、Yufang Han、Jun Ren、Zhongwen Wang
DOI:10.1039/d3ob00527e
日期:——
We have developed a visible-light-mediated formal [4 + 2] cycloaddition of arylcyclobutylamines with olefins, using QXPT-NPhCN as an organic photocatalyst. The corresponding cycloadducts could be obtained from electron-deficient olefins, aryl olefins and exocyclic olefins. We found that the addition of K3PO4 could significantly promote the cycloadditions. Using this method, 2-functionalized cyclohexylamines
我们开发了一种可见光介导的芳基环丁胺与烯烃的正式 [4 + 2] 环加成反应,使用QXPT-NPhCN作为有机光催化剂。相应的环加合物可以从缺电子烯烃、芳基烯烃和环外烯烃获得。我们发现添加K 3 PO 4可以显着促进环加成反应。使用这种方法,可以方便地获得 2-功能化的环己胺,包括具有螺骨架的环己胺。基于“3D-生物电子等排体”原理,我们设计合成了三种环己胺2-磺酰脲类化合物。
PIFA-mediated intramolecular N-arylation of 2-aminoquinoxalines to afford indolo[2,3-b]quinoxaline derivatives
作者:Subhashini V. Subramaniam、Badal Singh、Natarajan Pradeep、Saravanan Peruncheralathan
DOI:10.1039/d4ob00812j
日期:——
We present the PIFA-mediated intramolecular N-arylation of 2-aminoquinoxalines at room temperature for the first time. This method provides a wide range of indolo[2,3-b]quinoxalines in good to excellent yields within a short time. The C–H bond functionalization occurs without the need for an inert atmosphere or additives. Additionally, a double C–H bond functionalization was observed, where the first