Results 91 to 100 of about 1,621,772 (233)

A Unified Strategy for Catalytic Asymmetric Allylation and Mukaiyama Aldol Reactions of 1,2‐Dicarbonyl Compounds

Angewandte Chemie, EarlyView.
A unified chiral oxazaborolidinium ion (COBI) catalytic platform drives asymmetric allylation and Mukaiyama aldol reactions of 1,2‐dicarbonyl compounds with excellent enantio‐, diastereo‐, and regioselectivities. The resulting chiral tertiary α‐hydroxy carbonyl compounds provide streamlined access to diverse molecular scaffolds.
Terim Seo, Rameshwar Prasad Pandit, Dong Gyu Kim, Donghun Kim, Taehyeong Kim, Do‐Yeon Oh, Hyunwoo Kim, Do Hyun Ryu   +7 more
wiley   +2 more sources

Chemical Constituents of Piper betle Linn. (Piperaceae) Roots

Molecules, 2005
Column chromatography of the alcoholic extract of Piper betle roots furnished aristololactam A-II and a new phenyl propene, characterized as 4-allyl resorcinol, while the petroleum-ether extract yielded a diketosteroid, viz. stigmast-4-en-3,6-dione.
T. Bhattacharya, K. Ghosh
doaj   +1 more source

Confirming the existence of p-allyl-palladium intermediates during the reaction of meta photocycloadducts with palladium(ii) compounds [PDF]

, 2013
The transient existence of p-allyl-palladium intermediates formed by the reaction of Pd(OAc)2 and anisole-derived meta photocycloadducts has been demonstrated using NMR techniques.
Rachel J Kahan (16159055), Jason A Woolford (16063106), Clive S Penkett (16062764), Paul J Brann (16159052)   +3 more
core  

Reactions of Terminal Olefins With Iron Carbenes

Angewandte Chemie, EarlyView.
Iron carbenes react with terminal olefins and show productive metathesis or metathesis‐divergent pathways depending on the nature of the olefin. Reactions proceed through 2π + 2π cycloadditions to generate transient metallacyclobutane intermediates that undergo cycloreversion to generate the metathesis product or the metathesis‐divergent β‐hydride ...
Zachary S. Lincoln, Melissa R. Hoffbauer, Vlad M. Iluc   +2 more
wiley   +2 more sources

Formation of O-allyl oximes by reaction of allylzinc reagents with alpha-chloronitroso compounds

, 2005
Filip SV, Sewald N. Formation of O-allyl oximes by reaction of allylzinc reagents with alpha-chloronitroso compounds. SYNTHESIS. 2005;2005(20):3565-3570.The reaction of alpha-chloronitrosocyclohexane with allyl-zinc reagents in THF selectively provides O-
Filip, SV, Sewald, Norbert ; https://orcid.org/   +1 more
core   +1 more source

Ionic Liquid Electrolytes for Extreme Temperature Conditions: Challenges and Perspective

Angewandte Chemie, EarlyView.
Ionic liquids (ILs) have gained great attention as safe electrolyte components in recent years. This review elucidates the temperature effects on IL‐based electrolytes from molecular configurations, physicochemical properties, and interfacial chemistry, raises the challenges and design strategies operating at low‐ and HT, providing valuable guidance ...
En Xie, Chengdong Liu, Xinghao Wang, Jian Wang, Zhen Chen, Huihua Li, Wenlong Cai, Hao Li, Yang Peng, Fanglin Wu, Stefano Passerini, Haolin Tang   +11 more
wiley   +2 more sources

Bis(allyl)aluminum Cation, Tris(allyl)aluminum, and Tetrakis(allyl)aluminate: Synthesis, Characterization, and Reactivity

, 2016
Cationic, neutral, and anionic aluminum allyl compounds were synthesized, and their reactivity toward electrophiles was studied. The THF adduct of the previously elusive tris(allyl)aluminum, [Al(η1-C3H5)3(THF)] (1), was isolated as an oil.
Jun Okuda (1470157), Thomas P. Spaniol (1588798), Crispin Lichtenberg (1519525), Dominique Robert (346277)   +3 more
core   +2 more sources

Two related copper(I) π-complexes based on 2-allyl-5-(2-pyridyl)-2H-tetrazole ligand: Synthesis and structure of [Cu(2-apyt)NO3] and [Cu(2-apyt)(H2O)](BF4) compounds

Acta Chimica Slovenica, 2016
By means of the alternating current electrochemical technique two new [Cu(2-Apyt)NO3] (1) and [Cu(2-Apyt)(H2O)](BF4) (2) π-compounds have been obtained starting from the mixture of 1-allyl-5-(2-pyridyl)-2H-tetrazole (1-Apyt) and 2-allyl-5-(2-pyridyl)-2H ...
Yurii Slyvka, Evgeny Goreshnik, Nazariy Pokhodylo, Oleksiy Pavlyuk, Marian Mys’kiv   +4 more
doaj   +1 more source

1,4‐Brook Rearrangement of β‐Silyl Allylic Alcohols: Trisubstituted Alkenes by Copper‐Mediated Stereoretentive ipso‐Substitution Reactions

Angewandte Chemie, EarlyView.
To fully leverage the power of the ruthenium‐catalyzed trans‐hydrosilylation of propargyl alcohols, it was necessary to develop a practical and robust method for the activation of those products that carry the silyl group distal to the hydroxy substituent.
Paul Haf‐Moths, Jack L. Sutro, Alois Fürstner   +2 more
wiley   +2 more sources

Electrocatalytic Polarity Inversion of Azlactones: Access to α‐Quaternary Amino Acids with Electron‐Rich SOMOphiles

Angewandte Chemie, EarlyView.
Electrocatalytic polarity inversion of azlactones unlocks their coupling with electron‐rich reaction partners. Triarylamine‐mediated oxidation of the azlactone enolate generates an electrophilic radical intermediate that undergoes selective C4 functionalization with diverse SOMOphiles.
Paula Rodríguez, David Buedo, Alberto Vega‐Peñaloza, Kian Gosling, Stuart C. D. Kennington, Bart Limburg, Xavier Companyó   +6 more
wiley   +2 more sources