Results 131 to 140 of about 92,883 (234)

Double E─H Bond Activation of Ammonia and Water by Cyclic Gallaphosphene L(OCP)GaPGaL

Angewandte Chemie, EarlyView.
Cyclic gallaphosphene 1 undergoes a twofold E─H bond activation with ammonia and water via a beneficial interplay between the polar “GaPGa” unit and the electrophilic nature of the C center in the bridging PCO unit, yielding six‐membered heterocycles 2 and 3, in which both nucleophilic phosphorus atoms are protonated.
Mahendra K. Sharma, Christoph Wölper, Gebhard Haberhauer, Stephan Schulz   +3 more
wiley   +2 more sources

Predictive, Data‐Driven Design of Red‐Light Photoredox Catalysts for C─Heteroatom Bond Formation

Angewandte Chemie, EarlyView.
From redox numbers to red light: Donor oxidation and core reduction potentials predict E0‐0 in cyanoarene dyes, guiding selection of an efficient red‐light catalyst, 4MeODPATPN (PC13). Under 620 nm light, PC13 facilitates Ni‐catalyzed C─heteroatom cross‐couplings (C─N, C─O, C─S) with high functional‐group tolerance and reduced hydrodehalogenation ...
Amir Gizatullin, Tingting Yuan, Sascha Grotjahn, Luigi Cavallo, Burkhard König, Chen Zhu, Magnus Rueping   +6 more
wiley   +2 more sources

3-(2-Acetamidophenyl)sydnone

Acta Crystallographica Section E, 2009
Sydnones are unusual mesoionic compounds containing a five-membered heterocyclic ring. Generally for stability, substitution at the N-3 position by an aromatic fragment is necessary.
doaj   +1 more source

Vinylogous aldol reaction of heterocyclic silyloxy dienes. Application in synthesis [PDF]

, 2000
A versatile, readily accessible triad of 2-enoxy silane synthons derived from furan, pyrrole, and thiophene is presented. These heterocycles, in reacting with carbonyl and carbonyl- related acceptors, act as vinylogous nucleophile modules, giving rise ...
Casiraghi, Giovanni, Rassu, Gloria Maria Rita, Zanardi, Franca   +2 more
core  

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

Intermolecular Enantioselective Nickel‐Catalyzed Arylation of Un‐Activated C(sp3)─H Bond

Angewandte Chemie International Edition, EarlyView.
Ni: a new solution for asymmetric C(sp3)─H activation. The stereoselective synthesis of all‐carbon quaternary stereogenic centres is achieved via enantioselective C(sp3)─H arylation using a Ni‐BINOL‐derived catalyst. Rational catalytic cycle design uncovers a new reaction pathway that can efficiently induce chiral information during the stereoselective
Erwan Brunard, Fengjie Huang, Àlex Díaz‐Jiménez, Sofiya Kostiukovska, Joanna Wencel‐Delord   +4 more
wiley   +1 more source

Benzimidazole-Quinoline Hybrids: Synthesis and Antimicrobial Properties. [PDF]

Pharmaceuticals (Basel)
Marinescu M.
europepmc   +1 more source

The Impact of Organic Constituents in Coal Chemical Wastewater on Additive Adsorption at the Coal Surface: Experimental Investigation and Molecular Dynamics Simulation

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Direct preparation of coal–water slurry using coal chemical wastewater represents an economical and feasible approach for wastewater resource utilization. Unlike clean water, however, the complex organic components in wastewater may exert adverse effects on slurry properties.
Yi Xiang, Zhen Zhao, Fuyan Gao, Zhenghui Zhao, Hang Li, Eric J. Hu, Ruikun Wang   +6 more
wiley   +1 more source

Design and synthesis of coumarin-based pyrazole-pyrazoline hybrid derivatives and their photophysical, antimicrobial, sensing and computational studies. [PDF]

RSC Adv
Sharma N, Kumar A, Verma VP, Singh MB, Singh P, Shrivastava R.   +5 more
europepmc   +1 more source

Research Status and Development Trend of Macromolecular Structure and Model Construction of Different Coals

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Coal is a natural macromolecular substance composed of complex organic molecules and a small amount of minerals. Its chemical composition and microstructure are highly complex and variable, and no unified definition exists. This inherent structural complexity underscores the theoretical significance of constructing accurate macromolecular ...
Chao Zhou, Jun Chen, Yali Cheng, Huanhuan Shang, Longxiang Bao, Chenliang Peng   +5 more
wiley   +1 more source