نتایج جستجو برای: phosphine

تعداد نتایج: 3411  

Journal: :Organic & biomolecular chemistry 2009
Celia Clarke Stéphanie Foussat David J Fox Daniel Sejer Pedersen Stuart Warren

The stereocontrolled synthesis of trans-disubstituted cyclopropylketones has been achieved from beta-alkyl, gamma-benzoyl phosphine oxides via a three-step cascade reaction incorporating an acyl transfer, phosphinoyl transfer and cyclisation to form the cyclopropane. Using Evans' chiral oxazolidinone auxiliary and by masking the phosphine oxide moiety as a phosphine borane we have extended the ...

Journal: :Applied and environmental microbiology 1987
J Leitao G de Saint-Blanquat J R Bailly

Phosphine is a food fumigant, used until now as an insecticide and rodenticide. The present work researches the action of phosphine treatment on growth and aflatoxin production of 23 Aspergillus strains. Production of aflatoxins B1, B2, G1, and G2 decreased in almost all cases by a ratio of 10 to 100. Phosphine treatment therefore seems favorable to prevent growth of various Aspergillus strains...

Mehdi Torabi,

Aluminium phosphide (AlP) is used to kill rodents in grain storage. It produces phosphine gas which is toxic for mitochondria. The exact mechanism of action is unclear, but phosphine is thought to produce toxicity by blocking cytochrome-c oxidase, which inhibits oxidative phosphorylation and result in cell death. This poisoning has a high mortality, and survival is unlikely if more than 1.5 g i...

Journal: :Chemical communications 2012
Miao Huang Chun Li Jian Huang Wei-Liang Duan Sheng Xu

Bis(phosphine) pincer-Pd complex-catalyzed asymmetric addition of diarylphosphines to N-tosylimines was developed for the synthesis of chiral phosphine sulfides with high stereoselectivities (up to 96% ee) under mild conditions.

Journal: :Frontiers in bioscience 2012
Tao Liu Li Li Baishu Li Fanhua Zhang Yuejin Wang

Phosphine has been used worldwide for the control of stored-product insects for many years. However, the molecular mechanism of its toxicity is not clearly understood. In the current study, larvae of the peach fruit moth were fumigated with phosphine. Proteomic analysis was then performed to identify the regulated proteins. Our results confirmed the phosphine toxicity on the peach fruit moth. T...

2013
Alexander Sladek Hubert Schmidbaur

Bis(tri-'butyI-phosphine)gold(I) Tetrafluoroborate Alexander Sladek, Hubert Schmidbaur* Anorganisch-Chemisches Institut der Technischen Universität München, Lichtenbergstraße 4, D-85747 Garching Z. Naturforsch. 50b, 859-863 (1995); received November 11, 1994 (Phosphine)gold(I) Complexes, [(Phosphine)gold(I)]ammonium Cations, Auriophilicity, G old-G old Contacts The reaction of tris[(tri-'butyl-...

2002
Elias Daura-Oller Josep M. Poblet Carles Bo

To provide further insight into electronic and steric factors and to quantify their relative importance, we studied in detail the migratory CO insertion step for RhMe(CO)I2(L–L) systems (L–L = dppms (PPh2CH2P(S)Ph2) or dppe (PPh2CH2CH2PPh2)), Monsanto catalysts and some electronically unsymmetrical diphosphine model systems. The difference in the reaction rates of dppms and dppe has a clear ele...

Journal: :Chemical Reviews 2018

Journal: :Chemical communications 2008
Jonathan J Gammon Steven J Canipa Peter O'Brien Brian Kelly Sven Taylor

A comparison between phosphine boranes and sulfides in their catalytic asymmetric deprotonation using organolithiums and sub-stoichiometric amounts of (-)-sparteine has revealed superior catalytic efficiency in the phosphine sulfide deprotonation.

2015
Svetlana F Malysheva Alexander V Artem’ev Nina K Gusarova Nataliya A Belogorlova Alexander I Albanov C W Liu Boris A Trofimov

Secondary phosphine oxides react with vinyl sulfides (both alkyl- and aryl-substituted sulfides) under aerobic and solvent-free conditions (80 °C, air, 7-30 h) to afford 1-hydroxy-2-(organosulfanyl)ethyl(diorganyl)phosphine oxides in 70-93% yields.

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