Results 251 to 260 of about 15,069 (303)
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Journal of the Chemical Society, Chemical Communications, 1985
Lithiation of 1-methyl-4-pyridone with n-butyl-lithium at -78 °C proceeds smoothly at the C-2 position and 2-substituted-4-pyridones (1c–j) are obtained by subsequent reaction with electorphiles; lithiation of 1-methyl-2-pyridone takes place predominantly at the N-methyl, the lithio-derivative reacting rapidly, even at -78 °C with starting pyridone to ...
Premji Patel, John A. Joule
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Lithiation of 1-methyl-4-pyridone with n-butyl-lithium at -78 °C proceeds smoothly at the C-2 position and 2-substituted-4-pyridones (1c–j) are obtained by subsequent reaction with electorphiles; lithiation of 1-methyl-2-pyridone takes place predominantly at the N-methyl, the lithio-derivative reacting rapidly, even at -78 °C with starting pyridone to ...
Premji Patel, John A. Joule
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Lithiated benzyllithiums from chlorobenzyl chlorides by a DTBB-catalysed lithiation
Tetrahedron Letters, 1997Abstract The reaction of 2-, 3- or 4-chlorobenzyl chlorides ( 1a-c ) with an excess of lithium and a catalytic amount of DTBB (7 mol%) in the presence of different electrophiles [Pr i CHO, Bu t CHO, Et 2 CO, (CH 2 ) 5 CO, PhCOMe, Me 3 SiCl] in THF at −50°C leads after hydrolysis with water, to the expected dioles or disilylated compounds 2aa-2cf .
Cecilia Gómez +2 more
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Electrochemical lithiation and de-lithiation of MWNT–Sn/SnNi nanocomposites
Carbon, 2005Abstract Nanocrystalline multi-walled carbon nanotube (MWNT)–Sn and MWNT–SnNi composite anode materials were prepared by chemical reduction of SnCl2 and NiCl2 precursors in the presence of MWNTs. SEM and TEM observations showed that the Sn and SnNi particles are homogeneously dispersed on the MWNT surface and in the MWNT matrix.
Dou, S X +3 more
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Reversibility of the lithiation of η6-naphthalenetricarbonylchromium
Journal of Organometallic Chemistry, 1987Abstract The lithiation of naphthalenetricarbonylchromium with n-BuLi or tetramethylpiperidyllithium is under kinetic control, and with the latter reagent is highly regioselective in the 2-position. Addition of isopropylamine renders the process reversible, and an approximately 1 1 equilibrium mixture of 1- and 2-substitution product is formed.
Kundig, Ernst Peter +2 more
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Lithiation of a Pyrrolo-Annulated Tetrathiafulvalene
Synthesis, 2004Mono- and bis-lithiations of N-tosyl monopyrrolotetrathiafulvalene provide novel methods for the introduction of substituents, such as alkyl and halogens, into the 4- and 6-positions of monopyrrolotetrathiafulvalenes.
Petersen, Bo Møller +2 more
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Rearrangement Reactions of Lithiated Oxiranes
The Journal of Organic Chemistry, 2013The first computational study of the rearrangement reactions of oxiranes initiated by lithium dialkylamides is presented. Aside from the well-known carbenoid insertion pathways, both β-elimination and α-lithiation have been suggested as the exclusive mechanism by which oxiranes react in the presence of organolithium bases.
B Ramu, Ramachandran +2 more
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Obviating the need for nanocrystallites in the extended lithiation/de-lithiation of germanium
Journal of Materials Chemistry A, 2015Micrometer-sized germanium sub-telluride (Ge0.85Te0.15) particles show improved stability and capacity retention over similarly sized pure germanium particles when cycled at a rate of 1C over 500 cycles.
Emily J. Powell +4 more
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The Lithiation of 2‐Chloroglucal Derivatives.
ChemInform, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Boyd, Ewan +6 more
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Mechanochemical lithiation of layered polysilane
Chem. Commun., 2014Lithiated polysilane was synthesized by the mechanochemical reaction of layered polysilane with metallic lithium. The resulting dark green powder formed a Si–Li bond on the surface and demonstrated electroconductivity.
Masataka, Ohashi +6 more
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