Results 131 to 140 of about 195,223 (291)

Synthesis of Novel Trisubstituted Olefin-Type Probe Molecules Containing N-Heterocycles and Their Application in Detection of Malononitrile

Organics
Recently, the construction of the trisubstituted olefin-type probe molecules has elicited the attention of many researchers. However, the synthesis of the trisubstituted olefin-type probes containing two N-heterocycles simultaneously has been rarely ...
Zhao-Hua Chen, Shi-Wei Yu, Wen-Jin Xu, Miao-Xin Li, Yong Zeng, Si-Wei Deng, Jian-Yun Lin, Zhao-Yang Wang   +7 more
doaj   +1 more source

Characterization of aromaticity in analogues of titan's atmospheric aerosols with two-step laser desorption ionization mass spectrometry

, 2016
The role of polycyclic aromatic hydrocarbons (PAH) and Nitrogen containing PAH (PANH) as intermediates of aerosol production in the atmosphere of Titan has been a subject of controversy for a long time.
Benilan, Yves, Carrasco, Nathalie, Cernogora, Guy, Gazeau, Marie-Claire, Mahjoub, Ahmed, Schwell, Martin, Szopa, Cyril   +6 more
core   +3 more sources

Bent N‐Heterocyclic Allenes From a Well‐Defined Titanium Vinylidene Complex

Angewandte Chemie, EarlyView.
The syntheses and the structures of N‐heterocyclic allenes are reported. Allenes bearing fluorenylidene capping groups show markedly bent C═C═C units, a carbene‐like reactivity, and they can act as potent C‐donor ligands for metal complexes. ABSTRACT Allenes typically display a linear geometry. A notable exception occurs in allenes bearing two electron‐
Bastiaan Kooij, Damien W. Chen, Rosario Scopelliti, Farzaneh Fadaei‐Tirani, Kay Severin   +4 more
wiley   +2 more sources

Elucidating the Fe(III) Directed 15‐Step Domino Inter‐ and Intramolecular Progressive Coordinative Oligomerization of a Heterocycle Aggregate

Aggregate
Benzo[d]thiazol‐2‐ylmethanol undergoes progressive oligomerization under solvothermal conditions in the presence of FeCl₃·6H₂O, yielding a heterocyclic aggregate, namely 1,2,3‐tris(benzo[d]thiazol‐2‐yl)‐2,9‐dihydrobenzo[b]cyclopenta[e][1,4]thiazine ...
Kai‐Bin Chen, Ting‐Ting Wang, Zhi‐Wei Xu, Ning Tian, Jin Cai, Wen‐Yu Qiu, Bin Zhang, Zheng Yin, Bin Liu, Ming‐Hua Zeng   +9 more
doaj   +1 more source

Iterative Synthesis of Pentacene Derivatives with Continuous Boron–Oxygen Bonds

Angewandte Chemie, EarlyView.
An iterative synthetic strategy enables the controlled introduction of continuous multiple B–O bonds at the zigzag edge of acenes. A simple two‐step cycle—ipso iodination and Suzuki cross‐coupling/condensation—efficiently constructs BO‐acenes ranging from naphthalene to pentacene.
Seonghwa Jeong, Si‐In Kim, Jonghwan Lee, Hwon Kim, Jinuk Jang, Jiyeon Kim, Wonyoung Choe, Seung Kyu Min, Young S. Park   +8 more
wiley   +2 more sources

Strategies Toward Accessing Enantioenriched (Hetero)Benzo‐Fused 5‐ and 6‐ Membered Rings via Intermolecular Carbometalation

Angewandte Chemie, EarlyView.
The use of transition‐metal catalysts and design of chiral ligands have allowed chemists to access highly functionalized benzofused 5‐ and 6‐ membered rings in high yield and enantioselectivity. A common strategy used relies on an intermolecular carbometalation across alkynes and olefins, usually followed by a subsequent intramolecular carbometalation.
Clara Jans, Armaan Grewal, Xavier Abel‐Snape, Mark Lautens   +3 more
wiley   +2 more sources

Intermolecular Electrophilic Germylation Using GeCl4 and Al2Cl6

Angewandte Chemie, EarlyView.
While electrophilic aromatic substitution is well‐established for carbon and silicon‐based electrophiles, it is extremely underdeveloped for germanium. Herein we report the first effective intermolecular Germa–Friedel–Crafts reaction. The process can be modified to enable selective synthesis of the mono‐ or the di‐aryl germane derivatives, ArGeCl3 and ...
Justyna Łosiewicz, Milan Kumar Bisai, Zachary A. Bub, Stuart A. Macgregor, Michael J. Ingleson   +4 more
wiley   +2 more sources

Electron Transfer-oxy Radical Mechanism for Anti-cancer Agents: 9-anilinoacridines [PDF]

, 1987
A possible mode of action involving electron transfer is advanced for the 9- anilinoacridines. The mechanism entails formation of toxic oxy radicals which destroy the neoplasm.
Ames, James R., Kovacic, Peter, Ryan, Michael D.   +2 more
core   +1 more source

Homoleptic and Heteroleptic Borylones L1‐B(Ph)‐L2

Angewandte Chemie, EarlyView.
Density functional theory and CCSD(T) calculations reveal that homoleptic and heteroleptic borylones L1–B(Ph)–L2 are thermodynamically accessible. Remarkably, the homoleptic borylones B(Ph)(N2)2 and B(Ph)(SPh2)2 exhibit higher bond dissociation energies than the related carbones.
Qin Ma, Wei Li, Ya Hu, Lili Zhao, Gernot Frenking   +4 more
wiley   +2 more sources