- A quinolinium-derived turn-off fluorescent anion sensor
-
A quinolinium-derived anion sensor has been synthesised which shows a turn-off fluorescence response in the presence of anions, with selectivity for acetate. The compound exhibits complex anion binding comprising of a host dimer, 2:1 and 1:1 host:guest sp
- Swinburne, Adam N.,Paterson, Martin J.,Beeby, Andrew,Steed, Jonathan W.
-
-
Read Online
- Catalytic Conversion of N-Heteroaromatics to Functionalized Arylamines by Merging Hydrogen Transfer and Selective Coupling
-
To date, although tremendous advances have been made in N-heteroaryl C-H functionalization, there remain significant unmet challenges in the deconstruction of extensively applied but poorly reactive N-heteroaromatics to useful frameworks. Here, by a strat
- Cao, Liang,Ci, Chenggang,Jiang, Huanfeng,Tan, Zhenda,Wu, Yang,Yang, Jian,Zhang, Min
-
-
Read Online
- Selective construction of fused heterocycles by an iridium-catalyzed reductive three-component annulation reaction
-
Catalytic conversion of ubiquitously distributed but less reactive N-heteroarenes into functional products remains to date a challenge. Here, through an initial pretreatment of N-heteroarenes with alkyl bromide, we describe a syn-selective construction of functional fused heterocycles via iridium catalyzed reductive annulation of N-heteroarenium salts with formaldehyde and cyclic 1,3-diketones or 4-hydroxycoumarins, proceeding with broad substrate scope, good functional group compatibility, readily available feedstocks, and high step and atom efficiency.
- Gong, Lingzhen,Jiang, Huanfeng,Yang, Jian,Zhang, Min,Zhao, He
-
supporting information
p. 8292 - 8295
(2021/08/25)
-
- Copper-Catalyzed Selective 1,2-Difunctionalization of N-Heteroaromatics through Cascade C-N/CC/CO Bond Formation
-
This study presents an efficient strategy for constructing 1,2-difunctionalized quinoline derivatives via the multicomponent cascade coupling of N-heteroaromatics with alkyl halides and different terminal alkynes. This reaction was achieved through sequential functionalization at the one- and two-positions of quinolines, which displayed a broad substrate scope, environmental friendliness, excellent functional group tolerance, high atom efficiency, and chemoselectivity. The multicomponent coupling involved the abnormal construction of new C-N, CC, and CO bonds in one pot. The applicability of this method was further demonstrated by the late-stage functionalization of complex drug molecules under the established conditions.
- He, Qianlin,Xie, Feng,Xia, Chuanjiang,Liang, Wanyi,Guo, Ziyin,Zhu, Zhongzhi,Li, Yibiao,Chen, Xiuwen
-
supporting information
p. 7976 - 7980
(2020/11/02)
-
- Are pyridinium ylides radicals?
-
Pyridinium ylides are usually considered nucleophiles that can undergo various reactions involving electron pairs. However, it was found that ylides resulting from deprotonation ofN-alkyl-substituted pyridinium salts exhibit radical characters, with no di
- Liao, Fan,Huang, Wenhuan,Chen, Biao,Ding, Zijing,Li, Xingxing,Su, Hao,Wang, Tao,Wang, Yucai,Miao, Hui,Zhang, Xiaolong,Luo, Yi,Yang, Jinlong,Zhang, Guoqing
-
supporting information
p. 11287 - 11290
(2020/10/06)
-
- Arylamine derivative synthesized by deconstructing aza-aromatic hydrocarbon as well as method and application thereof
-
The invention belongs to the technical field of pharmaceutical chemicals, and discloses an arylamine derivative synthesized by deconstructing an aza-aromatic hydrocarbon as well as a method and application thereof. The method comprises the following steps
- -
-
Paragraph 0074-0075; 0092-0093; 0161-0162
(2020/07/15)
-
- Acidification corrosion inhibitor based on interpolymer indolizine derivative as well as preparation method and application thereof
-
The invention discloses an acidification corrosion inhibitor based on an interpolymer indolizine derivative as well as a preparation method and application thereof. The acidification corrosion inhibitor contains the interpolymer indolizine derivative; the interpolymer indolizine derivative is prepared by carrying out decarboxylation on heterocyclic alkali including (substituted) quinoline, (substituted) pyridine and the like, and carboxymethyl heterocyclic alkali quaternary ammonium salt obtained by alpha-haloacetic acid, and then carrying out intermolecular addition polymerization reaction onquaternary ammonium salt of the heterocyclic alkali including the (substituted) quinoline, the (substituted) pyridine and the like. The acidification corrosion inhibitor disclosed by the invention has relatively good corrosion inhibition performance under the condition that common corrosion inhibition synergists including alkynol and the like do not need to be compounded; the use amount of the acidification corrosion inhibitor is less and the acidification corrosion inhibitor can reach, even be better than the requirements of an acidification corrosion inhibitor performance testing method andfirst-grade to third-grade standards in evaluation indexes SY/T 5405-1996 when being independently used.
- -
-
Paragraph 0028
(2018/09/12)
-
- Comparison of the synergistic effect of counterions on the inhibition of mild steel corrosion in acid solution: Electrochemical, gravimetric and thermodynamic studies
-
Quinoline quaternary ammonium salts 1-benzylquinoline bromide (1) and 1-benzylquinoline chloride (2) have been synthesized and then developed as corrosion inhibitors in acidic HCl solution. Electrochemical impedance, potentiodynamic polarization and gravimetric measurements, as well as SEM, indicate that both can efficiently protect the mild steel from corrosion. The fact that 1 shows better performance than 2 under the same conditions could be attributed to the cooperative effect of counterions on the corrosion process. The results of thermodynamic and electrochemical studies were in agreement with the observed inhibition efficiency, indicating that counterions can affect the interactions between organic cations and the metal surface, and influence the stability of the protective film, which leads to the detected differences in their inhibition behavior.
- Bai, Li,Feng, La-Jun,Wang, Hong-Yan,Lu, Yong-Bin,Lei, Xiao-Wei,Bai, Fang-Lin
-
p. 4716 - 4726
(2015/02/19)
-
- A new enlargement methodology for the preparation of 2H-1- and 2H-3-benzazepin-2-one derivatives
-
An investigation of the one-carbon homologation of some 1-tribromomethyl-isoquinoline and 2-tribromomethyl-quinoline derivatives was conducted. Under the influence of an aqueous solution of silver nitrate in the presence of a nucleophilic species (MeOH, H
- Jean-Gérard, Ludivine,Pauvert, Micka?l,Collet, Sylvain,Guingant, André,Evain, Michel
-
p. 11250 - 11259
(2008/03/12)
-