نتایج جستجو برای: dialkyl acetylenedicarboxylates

تعداد نتایج: 1227  

Journal: :Chemical communications 2003
Thomas M Cameron John C Gordon Ryszard Michalczyk Brian L Scott

We report herein the synthesis and characterization of a lutetium dialkyl complex supported by a multidentate, anilido-pyridine-imine ligand and its subsequent transformation into an unprecedented cationic monoalkyl derivative.

Journal: :Organic & biomolecular chemistry 2011
Riccardo Mossetti Diego Caprioglio Giampiero Colombano Gian Cesare Tron Tracey Pirali

α-Isocyanoacetamides, acyl chlorides and dialkylacetylenedicarboxylates undergo a smooth multicomponent reaction to produce dialkyl 2-acyl-5-aminofuran-3,4-dicarboxylates in good yield. The scope and mechanism of this new multicomponent transformation are discussed.

Journal: :Chemical communications 2005
Weijun Niu Brett Rambo Mark D Smith John J Lavigne

Solid-state and solution analysis shows that dialkyl substituents on the central phenyl ring of bis(dioxaborole)s, such as , do not have an appreciable effect on the planarity but do significantly alter the supramolecular assembly of these compounds.

2003
Jean Jacques Vanden Eynde Annie Mayence

Domestic microwave ovens as well as laboratory reactors have been successfully employed to prepare dialkyl 1,4-dihydropyridine-3,5-dicarboxylates and to induce the synthesis of the corresponding aromatic derivatives. In that latter particular case, unexpected results have been reported.

Journal: :European Journal of Organic Chemistry 2021

The Front Cover shows the one-pot procedure for introduction of aminoalkyl chain through dialkyl carbonate chemistry into different phenolic substrates. This green approach is a direct alcohol substitution that avoids use chlorine giving CO2 and ethanol as only reaction by-products. proposed has numerous potential applications N,N-dialkyl ethylamine moieties are incorporated in many pharmacopho...

2012
F. E. Adelowo

Some dialkyl alkylphosphonates and dialkyl phenylphosphonates were synthesized by the reactions between trialkyl phosphite and alkyl/aryl halide in the presence of benzene. The synthesized compounds were characterized by elemental analysis, thin layer chromatography (TLC), fourier –transform infrared, ( 1 H, 13 C) nuclear magnetic resonance (NMR) spectroscopic techniques. In vitro fungicidal ac...

Journal: :Dalton transactions 2014
Kevin R D Johnson Paul G Hayes

Geometrically constrained dioxaphospholane rings were incorporated into a bis(phosphinimine)carbazole ligand (HL) in an effort to generate an ancillary ligand system that is capable of supporting reactive lutetium alkyl functionalities and resistant to cyclometalation reactivity. This new ligand was used to prepare a lutetium dialkyl species, LLu(CH2SiMe3)2; however, the complex exhibited low t...

2014
Robert A. Izydore Joseph T. Jones Benjamin Mogesa Ira N. Swain Ronda G. Davis-Ward Dwayne L. Daniels Felicia Frazier Kpakima Sharnelle T. Spaulding-Phifer

The synthesis of the title compounds was carried out by reacting dicarboxylic acid chlorides with oximes in the presence of excess triethylamine. Disubstituted malonyl chlorides gave 2-alkenyl-4,4-dialkyl-3,5-isoxazolidinediones (8a-f) and 2,2'-ethylidene-bis[4,4-dialkyl-3,5-isoxazolidinedione]s (9a-f). Compounds 9 were formed from 8 and its N-unsubstituted 3,5-isoxazolidinedione decomposition ...

Journal: :The Journal of organic chemistry 2009
Yu Chen Chul-Hee Cho Feng Shi Richard C Larock

3-Sulfenyl- and 3-selenylindoles are readily synthesized by a two-step process involving the palladium/copper-catalyzed crossing coupling of N,N-dialkyl-ortho-iodoanilines and terminal alkynes and subsequent electrophilic cyclization of the resulting N,N-dialkyl-ortho-(1-alkynyl)anilines with arylsulfenyl chlorides or arylselenyl chlorides. The presence of a stoichiometric amount of n-Bu(4)NI i...

Journal: :International journal of toxicology 2016
Monice M Fiume Bart Heldreth Wilma F Bergfeld Donald V Belsito Ronald A Hill Curtis D Klaassen Daniel C Liebler James G Marks Ronald C Shank Thomas J Slaga Paul W Snyder F Alan Andersen

The Cosmetic Ingredient Review (CIR) Expert Panel (Panel) assessed the safety of 8 dialkyl sulfosuccinate salts for use in cosmetics, finding that these ingredients are safe in cosmetics in the present practices of use and concentration when formulated to be nonirritating. The dialkyl sulfosuccinate salts primarily function as surfactants in cosmetics. The Panel reviewed the new and existing av...

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