Results 111 to 120 of about 19,048 (288)

Bifunctionalized Allenes. Part XV. Synthesis of 2,5-dihydro-1,2-oxaphospholes by Electrophilic Cyclization Reaction of Phosphorylated α-Hydroxyallenes

Molecules, 2014
This paper discusses a reaction of phosphorylated α-hydroxyallenes with protected or unprotected hydroxy groups involving 5-endo-trig cyclizations. Various electrophilic reagents such as sulfuryl chloride, bromine, benzenesulfenyl and benzeneselenenyl ...
Ismail E. Ismailov, Ivaylo K. Ivanov, Valerij Ch. Christov   +2 more
doaj   +1 more source

Multimetallic complexes based on phosphine- and phosphine oxide- appended \u3ci\u3ep\u3c/i\u3e-hydroquinones

, 2011
Presented here, is the work done with a series of binucleating ligands based on phosphine and phosphine oxide appended p-hydroquinones and their reactions towards various metals sources.
Pignotti, Louis R.
core   +1 more source

Concentric Rheostat Decoupled 3D Force‐Sensing Module for Smart Table Tennis Training

Advanced Intelligent Systems, EarlyView.
A 3D‐printed sensor array intrinsically decouples normal and shear forces through a unique concentric structural design. By integrating piezoresistive, sliding area‐varying capacitive, and concentric rheostat mechanisms, the 12‐sensor module achieves high‐resolution 3D force mapping without complex algorithms.
Zhe Liu, Kunlin Wu, Bingrui Sim, Wenjie Lai, Xingyu Chen, Jiajun Liu, Yifan Wang, Soo Jay Phee   +7 more
wiley   +1 more source

Catalytic Enantioselective Intramolecular Aza‐Michael Addition to α,β‐Unsaturated Esters

Angewandte Chemie, EarlyView.
A general method for accessing enantioenriched saturated N‐heterocycles via a catalytic enantioselective intramolecular aza‐Michael reaction to α,β‐unsaturated esters is described. A superbasic bifunctional iminophosphorane (BIMP) catalyst was key to enabling reactivity of the high pKa sulfonamide pronucleophile, whilst delivering good to excellent ...
Evan G. W. Rutter, Cameron J. MacRae, Haoran Xiong, Daniel Rozsar, Katherine F. P. Clarke, Darren J. Dixon   +5 more
wiley   +2 more sources

Palladium-Catalyzed C-H Functionalization and Flame-Retardant Properties of Isophosphinolines

Molecules
C-H activation is a powerful strategy for forming C-C bonds without the need for prefunctionalization. In this paper, we present a general, direct, and regioselective palladium-catalyzed functionalization of a phosphorus heterocycle, 2-phenyl-1H ...
Karen-Pacelye Mengue Me Ndong, Mina Hariri, Gabin Mwande-Maguene, Jacques Lebibi, Fatemeh Darvish, Christine Safi, Kouceila Abdelli, Adam Daïch, Claire Negrell, Rodolphe Sonnier, Loic Dumazert, Abdou Rachid Issaka Ibrahim, Ilagouma Amadou Tidjani, David Virieux, Tahar Ayad, Jean-Luc Pirat   +15 more
doaj   +1 more source

Tri-methyl-phosphine oxide dihydrate. [PDF]

IUCrdata, 2023
Urlep M, Cerkovnik J, Lozinšek M.
europepmc   +1 more source

Enantioselective Synthesis of a New Class of Stable and Functionalized Cyclopentadienes via CuH‐Catalysis

Angewandte Chemie, EarlyView.
Cyclopentadienes (CpHs) are fundamental building blocks with widespread applications in chemistry. However, their inherent acidity and isomeric instability have long limited access to chiral variants in an asymmetric fashion. Here, we introduce a CuH‐catalyzed asymmetric transformation that provides an unprecedented entry into a new class of ...
Piero Soppelsa, Riccardo Bellin, Besma Boulila, Francesco Vaghi, Manuel Orlandi   +4 more
wiley   +2 more sources

Cytotoxic Activity of Bisphosphonic Derivatives Obtained by the Michaelis–Arbuzov or the Pudovik Reaction

Pharmaceuticals
Background: Methylenebisphosphonic derivatives including hydroxy-methylenebisphosphonic species may be of potential biological activity, and a part of them is used in the treatment of bone diseases.
Zsuzsanna Szalai, Janka Bednárik, Boldizsár Szigfrid Tóth, Angéla Takács, Szilárd Tekula, László Kőhidai, Konstantin Karaghiosoff, László Drahos, György Keglevich   +8 more
doaj   +1 more source

Phosphine Oxide-Promoted Rh(I)-Catalyzed C-H Cyclization of Benzimidazoles with Alkenes. [PDF]

Molecules, 2023
Lu M, Xu W, Ye M.
europepmc   +1 more source

Synthesis of Mixed Phosphine–Phosphine Oxide Ligands by Rh(I)‐Catalyzed C─H Bond Alkylation

International audienceAbstractThe design of phosphine ligands is pivotal in transition metal catalysis, enabling fine‐tuning of catalytic activity, selectivity, and stability.
Beller, Matthias, Jackstell, Ralf, Geminiani, Loris, Soulé, Jean-François, Junge, Kathrin   +4 more
core   +1 more source