«acetylenic ester»
۱۸۹ نتیجهchemoselective reaction between 5,5-diarylhydantoins and acetylenic esters in the presence of trialkyl phosphite
the adducts produced in the reaction between trialkyl phosphites and acetylenic esters were trapped by hydantoins to produce highly functionalized dialkyl 2-(2,5-dioxo-4,4-diphenylimidazolidin-1-yl) succinate in good yields.
Chemoselective Reaction Between 5,5-Diarylhydantoins and Acetylenic Esters in the Presence of Trialkyl Phosphite
The adducts produced in the reaction between trialkyl phosphites and acetylenic esters were trapped by hydantoins to produce highly functionalized dialkyl 2-(2,5-dioxo-4,4-diphenylimidazolidin-1-yl) succinate in good yields.
Addition of Zinc Homoenolates to Acetylenic Esters and Amides : A Formal [ 3 + 21 Cycloaddition
The copper-catalyzed conjugate addition-cycloacylation reaction of zinc homoenolatee with acetylenic esters or acetylenic amides is described. The zinc homoenolate is prepared from [ (ethoxycyclopropy1)oxyltrimethylsilane and zinc chloride in ether. Addition of an acetylenic amid
Pyridine-catalyzed stereoselective addition of acyclic 1,2-diones to acetylenic esters: synthetic and theoretical studies of an unprecedented rearrangement.
A systematic study of the addition of various 1,2-acyclic diones to activated acetylenic esters catalyzed by pyridine under mild conditions is described. This reaction provides a new protocol for the stereoselective synthesis of 1,2-diaroyl maleates. The exclusive formation of th
AMild Method for the Preparation of g-Hydroxy- a,b-Acetylenic Esters**
The alkynylation of a carbonyl compound is a powerful reaction for forming a carbon–carbon s bond. Highly functionalized g-hydroxy-a,b-acetylenic esters RCH(OH)C C CO2Me (A) are promising synthetic intermediates that can be used as precursors to a variety of complex molecules. Si
Diastereoselective Synthesis of Stable Phosphorus Yields by a Three-Component Reaction between Ph3P and Acetylenic Esters in the Presence of Hydrazine Derivatives
In this work, stable crystalline phosphorus yields are obtained in good yields from the 1:1:1 addition reactions between hydrazine derivatives and dialkyl acetylenedicarboxylates in the presence of triphenylphosphine at room temperature in dichloromethane. This synthetic method h
Hydrotelluration of acetylenic esters: structural characterization of stereoisomers of methyl/ethyl β-(aryltelluro)acrylates
Department of Chemistry, University of Lu akschauhan2003@yahoo.co.in School of Life and Environmental Scien Australia Department of Chemistry, Howard Universi † Electronic supplementary information compounds 2Ba, 3Aa, 3Ba, 5Aa and 8 are supramolecular architecture in 5Bb are C–H/
An Efficient Synthesis of Vinylphosphonates from Alkyl Cyanoformates, Activated Acetylenes, and Trialkyl Phosphites
An efficient synthesis of vinylphosphonates is described. This involves the reaction of alkyl cyanoformates and dialkyl acetylendicarboxylates in the presence of trialkyl phosphites. The 1H, 13C NMR, and 31P NMR spectra of vinylphosphonates having different substitution are consi
Frontispiece: An Air‐ and Water‐Stable Hydrogen‐Bond‐Donor Catalyst for the Enantioselective Generation of Quaternary Carbon Stereocenters by Additions of Substituted Cyanoacetate Esters to Acetylenic Esters
Diastereoselective synthesis of phosphonato esters by reaction between triphenylphosphite and acetylenic esters in the presence of NH-acid compounds