scholarly journals Iron Catalyzed β-C(sp2)‒H Alkylation of Enamides

2021 ◽  
Author(s):  
Isabelle Gillaizeau ◽  
Cyril NICOLAS ◽  
Sylvain Bertho ◽  
Radhouan Maazaoui ◽  
Damla Torun ◽  
...  
Keyword(s):  
Stoichiometric Amount

An attractive atom-economic way was developed for the β-C(sp2)‒H (fluoro)alkylation of a range of acyclic and cyclic non-aromatic enamides using either FeCl2 as a catalyst or a stoichiometric amount of...

scholarly journals Recovery of Hg(0) from the Aqueous Hg(I/II) Present in Analyte Solution after Quantitative Determination of Iron

2013 ◽  
Vol 2013 ◽  
pp. 1-3
Author(s):  
Suman K. Giri ◽  
Nigamananda Das
Keyword(s):  
Aqueous Solutions ◽  
Quantitative Determination ◽  
Simple Method ◽  
Stoichiometric Amount ◽  
Analyte Solution

An easy and feasible approach to recover HgCl2, used in quantitative determination of iron values, as Hg(0) was described. Both Hg(I) and Hg(II), present in the solution after quantitative determination of iron, was completely reduced to Hg(0) by the addition of aluminium chips in more slightly excess than the stoichiometric amount. The purity of recovered Hg(0) was verified by comparing the value of density with pure mercury. This simple method may be useful to remove the mercury from other waste aqueous solutions before their discharge into the environment.

The Adsorption and Chemistry of Tripropyl phosphate (TPP) into Microporous and Mesoporous NaX Zeolites

2011 ◽  
Vol 1304 ◽  
Author(s):  
Qingguo Meng ◽  
David C. Doetschman ◽  
Apostolos K. Rizos ◽  
Min-Hong Lee ◽  
Jürgen T. Schulte ◽  
...  
Keyword(s):  
Solid State ◽  
Structural Properties ◽  
Nmr Spectra ◽  
Nitrogen Adsorption ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nax Zeolite ◽  
Stoichiometric Amount ◽  
Polydiallyldimethylammonium Chloride ◽  
Adsorption Analysis

ABSTRACTAdsorption and chemistry of tripropylphosphate (TPP) in mesoporous NaX zeolite, which was templated by cationic templated polymer (polydiallyldimethylammonium chloride, PDADMAC) with two different length chains, was investigated. The structural properties of the zeolites were characterized by X-ray diffraction (XRD) and nitrogen adsorption analysis. The chemical activities of different zeolites toward the decomposition of TPP were determined with solid state 31P NMR spectra. After exposure of zeolites to TPP was sufficient and equilibrium was reached, a stoichiometric amount of water was also adsorbed and hydrolysis was observed. The TPP decomposition yields in different NaX zeolites were compared.

The Synthesis of Aluminum Nitride from Aluminum Hydride

1988 ◽  
Vol 121 ◽  
Author(s):  
Atsushi Ochi ◽  
H. KENT BOWEN ◽  
Wendell E. Rhine
Keyword(s):  
Aluminum Nitride ◽  
Room Temperature ◽  
Condensation Reaction ◽  
Aluminum Hydride ◽  
White Powder ◽  
Synthetic Route ◽  
Stoichiometric Amount

ABSTRACTThe reaction between ammonia and aluminum hydride (AIH3) was investigated as a possible synthetic route to aluminum nitride (AIN), using tetrahydromran (THF) as the solvent. When an excess of ammonia was employed, a white powder was obtained which was converted to AIN by calcination. However, when a stoichiometric amount of ammonia was used, a soluble intermediate was obtained. This intermediate polymerized slowly at room temperature via a condensation reaction involving the elimination of hydrogen to give a gel that could be converted to AIN.

scholarly journals Copper-Promoted Cross-Coupling Reactions for the Synthesis of Aryl(difluoromethyl)phosphonates Using Trimethylsilyl(difluoromethyl)phosphonate

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3292 ◽  
Author(s):  
Kazuki Komoda ◽  
Rei Iwamoto ◽  
Masakazu Kasumi ◽  
Hideki Amii
Keyword(s):  
Cross Coupling ◽  
Catalytic Amount ◽  
Coupling Reactions ◽  
Stoichiometric Amount ◽  
Cross Coupling Reactions ◽  
Aryl Iodides

A convenient and effective route for the synthesis of aryl(difluoromethyl)phosphonates has been developed based on cross-coupling reactions. Upon treatment with a stoichiometric amount (or a catalytic amount in some cases) of CuI and CsF, aryl iodides reacted smoothly with (silyldifluoromethyl)phosphonates to give the corresponding aryl(difluoromethyl)phosphonates in good yields.

scholarly journals Practical Synthesis of Precursors of Cyclohexyne and 1,2-Cyclohexadiene

Synthesis ◽  
2019 ◽  
Vol 51 (07) ◽  
pp. 1561-1564 ◽  
Author(s):  
Kentaro Okano ◽  
Ryo Nakura ◽  
Kazuki Inoue ◽  
Atsunori Mori
Keyword(s):  
Room Temperature ◽  
Practical Method ◽  
Enol Ether ◽  
One Pot ◽  
Subsequent Formation ◽  
Silyl Group ◽  
Stoichiometric Amount ◽  
Lithium Enolate ◽  
Silyl Enol Ether ◽  
Practical Synthesis

This study investigated a practical method for regiocontrolled synthesis of precursors of strained cyclohexynes and 1,2-cyclohexadienes, which is a one-pot procedure consisting of a rearrangement of silyl enol ether and subsequent formation of the enol triflates. Triethylsilyl enol ether, derived from cyclohexanone, was treated with a combination of LDA and t-BuOK in n-hexane/THF to encourage the migration of the silyl group to generate an α-silyl enolate. Subsequently, the α-silyl enolate was reacted with Comins’ reagent to yield the corresponding enol triflate. Finally, the α-silylated trisubstituted lithium enolate for the synthesis of 1,2-cyclohexadiene precursor was isomerized in the presence of a stoichiometric amount of water for one hour at room temperature to exclusively provide tetrasubstituted lithium enolate for the synthesis of cyclohexyne precursor in one pot.

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