Results 121 to 130 of about 105,049 (336)

Efficient Green Light‐Induced Photoclick Reactions Enabled by Triplet–Triplet Annihilation Photon Upconversion

Angewandte Chemie, EarlyView.
A general strategy for 9,10‐phenanthrenequinone‐electron‐rich alkene (PQ‐ERA) photoclick reactions via triplet–triplet annihilation upconversion (TTA‐UC) under low‐intensity green light is reported. A TTA‐UC system of PdOEP (sensitizer) and DPA (annihilator) mixed with reactants generates UV/blue photons overlapping the absorption of PQ derivatives ...
Qingxin Luan, Mei Sang, Yuxin He, Hao Yang, Anna M. Doze, Lili Hou, Youxin Fu, Ben L. Feringa   +7 more
wiley   +2 more sources

2,5-Bis[(dimethylamino)methyl]-1H-pyrrole

IUCrData, 2016
The asymmetric unit contains two independent molecules, C10H19N3, which are linked into dimers by two Npyrrole—H...Namine hydrogen bonds.
Zhiqiang Guo, Pengxiang Li, Pengcheng Feng, Kai Liu, Xuehong Wei   +4 more
doaj   +1 more source

Axial Boron Coordination Reconstructs Stereostructure of Cu Single‐Atom Nanozymes for Efficient Water‐Phase Chemical Sensing

Angewandte Chemie, EarlyView.
Sun et al. proposed an axial boron coordination strategy to reconstruct the stereostructure of Cu SAzymes and enable them to serve as efficient laccase mimics for high‐throughput smart sensor array detection of phenolic pollutants in water phases. ABSTRACT Developing single‐atom nanozymes with stereoconfigurations is a new paradigm for biomimetic ...
Qijun Sun, Hongyu Shi, Si Liu, Ziping Li, Yu Yang, Fengwang Li, Wenli Wu, Qiongzheng Hu, Kang Liang   +8 more
wiley   +2 more sources

AgNTf2-catalyzed formal [3 + 2] cycloaddition of ynamides with unprotected isoxazol-5-amines: efficient access to functionalized 5-amino-1H-pyrrole-3-carboxamide derivatives

Beilstein Journal of Organic Chemistry, 2019
A formal [3 + 2] cycloaddition between ynamides and unprotected isoxazol-5-amines has been developed in the presence of catalytic AgNTf2 in an open flask.
Ziping Cao, Jiekun Zhu, Li Liu, Yuanling Pang, Laijin Tian, Xuejun Sun, Xin Meng   +6 more
doaj   +1 more source

Multiphoton ionization of pyrrole-water mixed clusters

, 2001
Multiphoton ionization of the hydrogen,bonded pyrrole-water clusters (C4H5N)(n)(H2O)(m) is studied with a reflectron-time of flight mass spectrometer at 355 mn.
Hu, YJ, Cai, Y, Lu, RC, Wang, XY
core  

Synthesis, In Vitro Biological Evaluation and Molecular Modeling of Benzimidazole-Based Pyrrole/Piperidine Hybrids Derivatives as Potential Anti-Alzheimer Agents

Pharmaceuticals
Benzimidazole-based pyrrole/piperidine analogs (1–26) were synthesized and then screened for their acetylcholinesterase and butyrylcholinesterase activities. All the analogs showed good to moderate cholinesterase activities.
Sundas Tariq, Fazal Rahim, Hayat Ullah, Maliha Sarfraz, Rafaqat Hussain, Shoaib Khan, Misbah Ullah Khan, Wajid Rehman, Amjad Hussain, Mashooq Ahmad Bhat, Muhammad Kamran Farooqi, Syed Adnan Ali Shah, Naveed Iqbal   +12 more
doaj   +1 more source

Poly(N-methyl pyrrole) and its copolymer with pyrrole for mild steel protection

, 2007
In this study, it was aimed to overcome disadvantages of polypyrrole films like water up taking and resulting low stability, via copolymerization of pyrrole and N-methyl pyrrole and preparing their bilayer films.
Tansug G., Erbil M., Tüken T., Yazici B.   +3 more
core   +1 more source

Practical Synthesis of Ethyl 3‑Fluoro-1-pyrrole-2-carboxylate: A Key Fragment of a Potent Drug Candidate against Hepatitis B Virus

, 2019
We report herein the development of two efficient synthetic routes for the preparation of a key fragment required for the synthesis of potent drug candidates of Hepatitis B virus. The ethyl 3-fluoro-1-H-pyrrole-2-carboxylate scaffold was synthesized from
Yang Cheng (125394), Thomas Poisson (1627144), Jérôme Fortin (7475057), Philippe Jubault, Xavier Pannecoucke, Yicheng Deng (7475054), Philippe Jubault (1627159), Adeline René, Yang Cheng, Jean-François Bonfanti (1670353), Maxime Quilan, Christopher A. Teleha, Pierre Raboisson (1833790), Thomas Poisson, Maxime Quilan (7475051), Jean-François Bonfanti, André. B. Charette, Jérôme Fortin, Pierre Raboisson, Adeline René (1514590), Christopher A. Teleha (1479703), Xavier Pannecoucke (1393786), André. B. Charette (7475060), Yicheng Deng   +23 more
core   +1 more source

Bifunktionale Cosubstrate ermöglichen Threonin‐Dehydrogenase katalysierte chemoenzymatische Pyrrolsynthese

Angewandte Chemie, EarlyView.
Klassische Knorr‐Chemie trifft auf moderne Biokatalyse. Die Threonindehydrogenase erzeugt aus l‐Threonin Aminoaceton, welches direkt in einer chemoenzymatischen Knorr‐Pyrrolsynthese abgefangen wird. Ein bifunktionales β‐Dicarbonylsubstrat dient sowohl als Pyrrolbaustein als auch als Hydridakzeptor für integrierte NAD+‐Recyclierung und ermöglicht die ...
Valentina Jurkaš, Fabian M. Kulier, Jorge González‐Rodríguez, Carlotta Chiesa, Peter Both, Peter Šiška, Fabio Parmeggiani, Florian Rudroff, Margit Winkler   +8 more
wiley   +1 more source

Crystal structures of methyl 3-(4-isopropylphenyl)-1-methyl-1,2,3,3a,4,9b-hexahydrothiochromeno[4,3-b]pyrrole-3a-carboxylate, methyl 1-methyl-3-(o-tolyl)-1,2,3,3a,4,9b-hexahydrothiochromeno[4,3-b]pyrrole-3a-carboxylate and methyl 1-methyl-3-(o-tolyl)-3,3a,4,9b-tetrahydro-1H-thiochromeno[4,3-c]isoxazole-3a-carboxylate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compounds, C23H27NO2S, (I), and C21H23NO2S, (II), the pyrrole rings have envelope conformations with the C atom substituted by the benzene ring as the flap.
R. Raja, M. Suresh, R. Raghunathan, A. SubbiahPandi   +3 more
doaj   +1 more source