Results 121 to 130 of about 153,572 (317)

Ruthenium‐Catalyzed Azide‐Selenoalkyne Cycloadditions: A Combined Synthetic–Computational Study into Reaction Scope, Mechanism, and Origins of Regioselectivity

Advanced Synthesis &Catalysis, EarlyView.
A ruthenium‐catalyzed azide–alkyne cycloaddition (RuAAC) reaction is reported for the synthesis of selenium‐substituted triazole products. Reaction regioselectivity is dependent on the identity of the non‐selenium substituent of the alkyne, which challenges the perceived understanding of RuAAC regioselectivity.
Frances E. Bugden, Andrew D. Bage, Ashima Bajaj, Bin Wang, Fiona J. Gibson, Henry Stone, Yingjian Xu, Frank De Proft, Mercedes Alonso, Mark D. Greenhalgh   +9 more
wiley   +1 more source

One‐Pot Cascade Synthesis of Isoquinolinone‐Fused Quinoxalines Through Sequential Rh(III)/Pd(II) Catalysis

Advanced Synthesis &Catalysis, EarlyView.
A new one‐pot, dual catalytic strategy for the synthesis of polycyclic isoquinolinone‐fused quinoxalines from commercially available N‐(2‐acetamidophenyl)benzamides and 1,3‐diynes is reported. This transformation proceeds via Rh(III)/Pd(II)‐mediated sequential NH/CH activation/annulation. Detailed mechanistic studies elucidate the reaction pathway. A
Wei‐Jung Chiu, Indrajeet J. Barve, Hung‐Sheng Hsieh, Chung‐Ming Sun   +3 more
wiley   +1 more source

Studies on Heteroaromaticity. XIX. Direct 1,3-Dipolar Cycloaddition of Hydroxamoyl Chlorides with Enamines [PDF]

, 1968
Tadashi Sasaki, Toshiyuki Yoshioka
openalex   +1 more source

Recent Advances in Ene Reactions with Carbon Enophiles

Advanced Synthesis &Catalysis, EarlyView.
Recent advances in the classical intra‐ and intermolecular ene nexus with carbon enophiles (alkenes, alkynes, arynes, and allenes) show a considerable increase in structural complexity and an enormous potential for functional applications in polymer science.
Thomas J. J. Müller
wiley   +1 more source

Cycloadditions of difluoromethylenecyclopropanes

Journal of Fluorine Chemistry, 1982
Abstract The isomeric difluoromethylenecyclopropanes, 1 + 2 were allowed to react with various alkene and diene reagents in order to test the reactivity of these two species toward (2+2) and (2+4) cycloadditions. Reactions with 1,1-dichloro-2,2-difluoroethylene, butadiene, cyclopentadiene, furan and diphenylisobenzofuran were attempted.
Dept. of Chemistry, University of Florida, Gainesville, FL 32611, U.S.A. ( host institution ), Dolbier, William R. ( author ), Daly, Daniel ( author ), Smart, Bruce E. ( author )   +3 more
openaire   +3 more sources

Electrocatalytic Dehydrogenative Lactonization of Benzylic Alcohols: A Sustainable Access to Phthalides via N‐hydroxyphthalimide Mediation

Advanced Synthesis &Catalysis, EarlyView.
A mild, scalable electrocatalytic method for direct lactonization of benzylic alcohols to phthalides using N‐hydroxyphthalimide as a redox mediator is reported. This metal‐free process proceeds via a phthalimide‐N‐oxyl‐mediated hydrogen atom transfer mechanism, shows broad scope with good to excellent yields, and enables late‐stage functionalizations ...
Pietro Ronco, Antonia Simi, Enrico Lunghi, Emanuele Casali, Giovanni Lenardon, Alessio Porta, Giuseppe Zanoni   +6 more
wiley   +1 more source

Cycloaddition of Diphenylnitrilimine to 1,5-Benzodiazepines [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2000
The cycloaddition reaction of diphenylnitrilimine on the 1,5-benzodiazepines has been studied. New molecules of triazolobenzodiazepines type have been isolated and characterized.
Rachid Zinber, Redouane Achour, Ahmed Jalal El Hajji, Asmaa Hakan, Mohammed Zoubair Cherkaui   +4 more
doaj  

Cooperative Rh2(OAc)4/Chiral Phosphoric Acid‐Catalyzed (3 + 3)‐Cycloadditions of Pyrrole‐3‐Methides and Carbonyl Ylides

Advanced Synthesis &Catalysis, EarlyView.
A stereoselective one‐step (3 + 3)‐cycloaddition between in situ generated pyrrole‐3‐methides and carbonyl ylides has been developed using cooperative rhodium and chiral phosphoric acid catalysis. The reaction affords oxa‐bridged cyclohepta[1,2‐b]pyrroles bearing three stereogenic centers, including two quaternary ones, in high yields and ...
Philipp Stehr, Christoph Schneider
wiley   +1 more source

Thermal [2 + 3] cycloaddition of imino compounds to 3-aroylaziridines. Synthesis of imidazolidines [PDF]

, 1969
J. W. LOWN, J. P. Moser, Robert Westwood
openalex   +1 more source

Cu(I)‐Catalyzed Interrupted Cycloaddition Between Azides, Ag(I)‐Acetylides, and Diorganoyl Dichalcogenides

Advanced Synthesis &Catalysis, EarlyView.
Unleashing the power of Ag(I)‐acetylides with LiCl/dimethyl sulfoxide (DMSO). The LiCl/DMSO mixture have an unexplored ability to dramatically increase the solubility of Ag(I)‐acetylides regardless of their molecular structure, which is explored to achieve high chemoselectivity in the Cu(I)‐catalyzed interrupted cycloaddition between organic azides, Ag(
Diego Seckler, Eduardo Q. da Luz, Gabriel L. Silvério, Francielli Sousa Santana, Gul Badshah, Wystan K. Teixeira, Caroline R. Montes D’Oca, Ricardo S. Schwab, Daniel S. Rampon   +8 more
wiley   +1 more source