Results 131 to 140 of about 101,033 (289)

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

Recent Advances in Indazole-Derived Heterocycles: Synthetic Strategies, Functionalization, and Therapeutic Potential

Journal of Chemistry
Indazole-derived heterocycles have garnered significant attention in recent years due to their versatile chemical structures and wide-ranging biological activities. This review explores the recent progress in the synthesis of indazole-based heterocycles,
Uday V. Bhat, Glanish Jude Martis, Dinesh Chikkanna, Santosh L. Gaonkar   +3 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

Efficient Synthesis of Cyclopropane-Fused Heterocycles with Bromoethylsulfonium Salt [PDF]

, 2013
Aggarwal, Artamonov, Basavaiah, Boger, Bornholdt, Catalan-Munoz, Chaplinski, de Carne-Carnavalet, Donohoe, Eckert, Feng, Fritz, Fritz, Fritz, Galeazzi, Gensini, Gomi, Gosselck, Gosselck, Greene, Hanessian, Hansch, Huang, Iwabuchi, Jeffery, Kamimura, Kasai, Kim, Kim, Kokotos, Krieter, Krow, Kulinkovich, Lin, Maeda, Mao, McGarrigle, McGarrigle, Meldrum, Miller, Namba, Nelson, Njoroge, Norris, Nunez, Ohno, Renslo, Sabbatini, Sasaki, Sattigeri, Schoepp, Shi, Takahashi, Tverezovsky, Unthank, Unthank, Van Zijl, Wiberg, Wirth, Xie, Xie, Xu, Yamanaka, Yar, Yar, Yar, Zhang   +66 more
core   +3 more sources

A Second-Generation Janus Scorpionate Ligand: Controlling Coordination Modes in Iron(II) Complexes by Steric Modulation [PDF]

, 2008
The second-generation Janus scorpionate ligand [HB(mtdaMe)3−] containing methyl-mercaptothiadiazolyl (mtdaMe) heterocyclic rings and (N,N,N-) and (S,S,S-) binding pockets has been prepared. The effect of methyl substitution versus the unsubstituted first-
Gardinier, James R., Grandjean, Fernande, Gwengo, Chengeto, Lindeman, Sergey V., Long, Gary J., Silva, Rosalice M., Smith, Mark D.   +6 more
core   +1 more source

Porous Phenazine‐bridged Tetraoxa[8]Circulenes for Selective Gold Recovery and Heterogeneous Catalysis

Angewandte Chemie, EarlyView.
Gold recycling from electronic waste using porous materials is an emerging concept to reduce the environmental impact of gold mining. In this work, we report the synthesis of a highly porous phenazine‐derived tetraoxa[8]circulene polymer and its utilization in gold capture and heterogeneous catalysis.
Patrick W. Fritz, Eylül Attar, Timur Ashirov, Krzysztof Piech, Ali Coskun   +4 more
wiley   +2 more sources

An Unusual Hydrogen Migration/C−H Activation Reaction with Group 3 Metals [PDF]

, 2011
A novel hydrogen migration from the phenyl ring to the pyridine ring of an yttrium pyridyl complex supported by a 1,1′-ferrocene diamide ligand is reported.
Benitez, Diego, Diaconescu, Paula L., Goddard, William A., III, Miller, Kevin L., Tkatchouk, Ekaterina, Williams, Bryan N.   +5 more
core   +1 more source

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

Alkoxy- and hydroxycyclization of enynes catalyzed by Pd(II) and Pt(II) catalysts [PDF]

, 2006
The development of a novel reaction ideal in terms of atom economy was achieved. The scope of the reaction was evaluated in the presence of Pd and Pt catalysts.
Charruault, Lise, Genêt, Jean-Pierre, Gladiali, Serafino Gabriele, Michelet, Véronique   +3 more
core  

Alcohol‐Directed Carboamination of Conjugated Enynes

Angewandte Chemie, EarlyView.
The first general three‐component intermolecular Pd‐catalyzed carboamination of conjugated enynes enables the coupling of anilines and aryl triflates to produce functionalized allenic amines, utilizing a native alcohol directing group to control regioselectivity.
Helena Solé‐Àvila, Duncan K. Brownsey, Hugo Senelle, Jerome Waser   +3 more
wiley   +2 more sources