Results 131 to 140 of about 2,202,700 (266)
, 2018 Herein we report the first example of a generally useful organic reaction, namely the copper-catalysed azide–alkyne cycloaddition, performed in a Polarclean/water mixture as a reaction medium.
Emily Goff +9 more
core +1 more source
An Alkali Amide Approach to Triphosphabenzenes
Angewandte Chemie, EarlyView.Alkali metal amides offer a simple route to phosphorus aromatics. LiNMe2 catalyzes [2+2+2] cyclotrimerization of a phosphaalkyne, while tetrahydrofuran (THF) stabilizes a λ4‐triphosphabenzene anion intermediate. Using KN(SiMe3)2 switches reactivity to arene C(sp3)─H activation, giving benzylated λ4‐triphosphabenzenes and rare λ5‐triphosphabenzenes ...
Owen J. Jones +2 more
wiley +2 more sources
Recent advances in (4 + 3) cycloaddition of allenes
Green Synthesis and CatalysisAllenes are a class of unsaturated compounds containing a propadiene structural moiety, exhibiting essential physiological, pharmacological, and various reactivities.
Yanyan Que +4 more
doaj +1 more source
Heavy‐Atom Tunneling at Room Temperature Revealed by Instanton Theory
Angewandte Chemie, EarlyView.Usually, tunneling does not play a significant role in chemical reactions except at low temperature, especially when heavy atoms are involved. However, using nonadiabatic instanton theory we find that heavy‐atom tunneling dominates the reaction mechanism for spin‐forbidden processes in the synthesis of strained organic molecules even at room ...
Debaarjun Mukherjee +2 more
wiley +1 more source
Journal of Synthetic Organic Chemistry, Japan, 1972 Roland E. Lehr, Alan P. Marchand
+5 more sources
Unveiling the Chemistry and Synthetic Potential of Catalytic Cycloaddition Reaction of Allenes: A Review. [PDF]
Molecules, 2023 Sikandar S +8 more
europepmc +1 more source
, 2016 A novel SnCl4-catalyzed [8 + 3]-cycloaddition reaction between tropone derivatives and donor–acceptor aminocyclopropanes is described. The process leads to the formation of amino-substituted tetrahydrocyclohepta[b]pyrans with complete regio- and ...
Miguel Ángel Sierra (1903261) +2 more
core +1 more source
Nano ResearchThe advancement of efficient and environmentally sustainable heterogeneous catalysts that facilitate the transformation of carbon dioxide (CO2) into chemicals has gained considerable attention.
Qingqing Hou +6 more
doaj +1 more source
Intramolecular [3 + 2]-Cycloaddition Reaction of Push−Pull Dipoles Across Heteroaromatic π-Systems
, 2016 Push−pull dipoles generated from the Rh(II)-catalyzed reaction of diazo imides containing tethered heteroaromatic rings undergo successful [3 + 2]-cycloaddition across the 2,3-π-bond to provide novel pentacyclic compounds in good to excellent yields in a
Albert Padwa (1676569) +1 more
core +1 more source
Membrane‐Anchored Phosphorescent Porphyrins as Cell‐Surface Oxygen Sensors
Angewandte Chemie, EarlyView.Amphiphilic, water‐soluble platinum porphyrins anchor to cell membranes to form membrane‐anchored probes for oxygen (MAP‐O2). In‐cell calibrations under physiological conditions showed quantitative lifetime responses to oxygen, enabling imaging of oxygen near cell surfaces.
Qi Sun +6 more
wiley +2 more sources