Results 61 to 70 of about 112,449 (386)

Harnessing Vinylogy with Radicals: Photoinduced γ‐Benzylation Reactions of 2‐Silyloxyfurans

Advanced Synthesis &Catalysis, EarlyView.
Two radical‐mediated benzylations of 2‐silyloxyfurans, promoted by visible light and suitable photoredox catalysts have been disclosed. A broad scope of γ‐benzyl butenolides was obtained in one step, some of which were used as strategic precursors to bio‐valuable chiral butanolides.
Enrico Marcantonio, Debora Guazzetti, Luca Aimi, Kelly Bugatti, Pedro Mena, Marco Giannetto, Simone Fortunati, Andrea Sartori, Lucia Battistini, Leonardo Andreoni, Marco Lombardo, Franca Zanardi, Claudio Curti   +12 more
wiley   +1 more source

Phytochemical profile of stem extract of Carthamus oxycantha and identification of herbicidal and antimicrobial constituents

Plant Protection Science
The present study was carried out to enlist herbicidal and antimicrobial compounds in the methanolic stem extract of Carthamus oxycantha, a problematic weed of Asteraceae. Methanolic stem extract was subjected to GC-MS analysis that revealed the presence
Muhammad Rafiq, Amna Shoaib, Arshad Javaid, Shagufta Perveen, Hafiz Umair Asdullah, Chunsong Cheng   +5 more
doaj   +1 more source

Synthesis and NMR-Study of 1-Trimethylsilyl Substituted Silole Anion [Ph4C4Si(SiMe3)]−•[Li]+ and 3-Silolenide 2,5-carbodianions {[Ph4C4Si(n-Bu)2]−2•2[Li]+, [Ph4C4Si(t-Bu)2]−2•2[Li]+} via Silole Dianion [Ph4C4Si]−2•2[Li]+

Molecules, 2013
1-Trimethylsilyl, 1-R (R = Me, Et, i-Bu)-2,3,4,5-tetraphenyl-1-silacyclopentadiene [Ph4C4Si(SiMe3)R] are synthesized from the reaction of 1-trimethylsilyl,1-lithio-2,3,4,5-tetraphenyl-1-silacyclopentadienide anion [Ph4C4SiMe3]−•[Li]+ (3) with methyl ...
Jang-Hwan Hong
doaj   +1 more source

Reverse-selective diffusion in nanocomposite membranes

, 2005
The permeability of certain polymer membranes with impenetrable nanoinclusions increases with the particle volume fraction (Merkel et al., Science, 296, 2002).
D. J. Jeffrey, P. G. de Gennes, Reghan J. Hill, S. Asakura, W. B. Russel   +4 more
core   +1 more source

Highly efficient synthesis of the tricyclic core of Taxol by cascade metathesis [PDF]

, 2014
An efficient enantioselective synthesis of the ABC tricyclic core of the anticancer drug Taxol is reported. The key step of this synthesis is a cascade metathesis reaction, which leads in one operation to the required tricycle if appropriate fine-tuning ...
Aldegunde M. J., Aldegunde M. J., Aldegunde M. J., Aurélien Letort, Bourgeois D., Bourgeois D., Bourgeois D., Bourgeois D., Bourgeois D., Chatterjee A. K., Cong Ma, De-Liang Long, Doi T., Garber S. B., Goldring P. D., Grieco P. A., Holton R. A., Holton R. A., Joëlle Prunet, Kim S.-H., Ma C., Masters J. J., Mendoza A., Morihara K., Mukaiyama T., Muller B., Muller B., Nicolaou K. C., Rémi Aouzal, Schiltz S., Scholl M., Schwab P., Swindell C. S., Wender P. A., Wender P. A., Wilde N. C., Winkler J. D., Yamazaki Y., Yared J. A., Yvon D.   +39 more
core   +3 more sources

Asymmetric Strategies for the Synthesis of Enantiopure α‐/β‐/γ‐Thio‐Carboxylic Acids Bearing a Stereocentre at CS Bond

Advanced Synthesis &Catalysis, EarlyView.
Enantioenriched α‐/β‐/γ‐thiocarboxylic acids featuring C–S chirality are valuable targets in organic synthesis. This review outlines recent progress in their asymmetric synthesis, including chiral pool approaches, metal‐ /organo‐catalysis, and emerging biocatalytic strategies. Enantiomerically pure α‐/β‐/γ‐thiocarboxylic acids bearing a stereocentre at
Jingyue Wu, Daniele Castagnolo
wiley   +1 more source

Synthesis and crystal structures of boryl ortho-silylaryl trifluoromethanesulfonates

Acta Crystallographica Section E: Crystallographic Communications
We report the synthesis and structural characterization of three crystalline borylated ortho-silylaryl trifluoromethanesulfonates: 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2-(trimethylsilyl)phenyl trifluoromethanesulfonate, C16H24BF3O5SSi (1a), 4-(
Fredrik Barnå, Matic Hribersek, Andreas Orthaber, Lukasz T. Pilarski   +3 more
doaj   +1 more source

Crystal structure of nitridobis(trimethylsilanolato)[1,1,1-trimethyl-N-(trimethylsilyl)silanaminato]molybdenum(VI)

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, [Mo(C6H18NSi2)(C3H9OSi)2N], the MoVI cation is located on a mirror plane and is coordinated by a nitride anion, a 1,1,1-trimethyl-N-(trimethylsilyl)silanaminate anion and two trimethylsilanolate anions in a distorted tetrahedral ...
Caiwei Geng, Xiang Hao, Peng Jiao
doaj   +1 more source

Polyphenylquinoxalines containing pendant phenylethynyl and ethynyl groups [PDF]

, 1983
Poly(phenylquinoxaline) prepolymers containing pendant phenylethynyl and ethynyl groups are disclosed along with the process for forming these polymers.
Hergenrother, P. M.
core   +1 more source

Cyclodienyl 1,3 - Dianionic Synthons: A Novel Synthesis of 5,5 - Dimethyl - 1,3 - Bis - (trimethylsilyl) Cyclohexa - 1,3 - Diene and its Diels - Alder [π4s+π2s] Cycloadditions with Six Dienophiles [PDF]

, 2012
The synthesis of 5,5-dimethyl-1,3-bis(trimethylsilyl)cyclohexa-1,3-diene: a novel cyclic 1,3-dianionic synthon is reported by the Wurtz-Fittig coupling reaction of 1,3-dichloro-5,5-dimethylcyclohexa-1,3-diene with metallic sodium and ...
Hariprasad Suresh, ., Venkatesh, G. Bhoothappa.   +1 more
core   +1 more source