Results 11 to 20 of about 4,239 (193)
Molecules, 2014 The coupling of proline- and azetidinone-substituted alkenes to 2-azidobenzoic and 2-azidobenzenesulfonic acid gives precursors that undergo intramolecular azide to alkene 1,3-dipolar cycloadditions to give imine-, triazoline- or aziridine-containing ...
Karl Hemming +3 more
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, 2016 Intramolecular cycloadditions with high regio- and stereocontrol are important methods for the efficient assembly of complex molecular structures. Efficient routes to the synthesis of norbornadiene-tethered nitrile oxides have been developed, and their ...
Robert Jordan (346146) +3 more
core +17 more sources
1,3-Dipolar cycloadditions of azomethine imines
Organic & Biomolecular Chemistry, 2015 Azomethine imines react with alkenes and alkynes to give pyrazolines, pyrazolidines, pyrazolopyridines, indazoloisoquinolines, pyrazolo[1,5-a]isoquinolines and pyrazolopyrazolones through regio-, stereo- and enantioselective 1,3-dipolar cycloadditions.
Nájera, Carmen +2 more
openaire +6 more sources
Dynamic Catalytic Highly Enantioselective 1,3-Dipolar Cycloadditions. [PDF]
Angew Chem Int Ed Engl, 2021 In dynamic covalent chemistry, reactions follow a thermodynamically controlled pathway through equilibria. Reversible covalent-bond formation and breaking in a dynamic process enables the interconversion of products formed under kinetic control to ...
Yildirim O +5 more
europepmc +2 more sources
1,3-Dipolar Cycloadditions of Diazo Compounds in the Presence of Azides. [PDF]
Org Lett, 2016 The diazo group has untapped utility in chemical biology. The tolerance of stabilized diazo groups to cellular metabolism is comparable to that of azido groups. However, chemoselectivity has been elusive, as both groups undergo 1,3-dipolar cycloadditions
Aronoff MR, Gold B, Raines RT.
europepmc +2 more sources
Exploring strain-promoted 1,3-dipolar cycloadditions of end functionalized polymers. [PDF]
Chemistry, 2014 Strain-promoted 1,3-dipolar cycloaddition of cyclooctynes with 1,3-dipoles such as azides, nitrones, and nitrile oxides, are of interest for the functionalization of polymers.
Ledin PA +3 more
europepmc +2 more sources
Phospha-Münchnones: Electronic Structures and 1,3-Dipolar Cycloadditions
, 2016 The reaction of imines, acid chlorides, PR3, and base generates a new class of 1,3-dipoles: phospha-Münchnones. These 1,3-dipoles can undergo cycloadditions with alkynes followed by loss of phosphine oxides to form pyrroles.
Bruce A. Arndtsen (1310721) +5 more
core +4 more sources
Kinetic solvent effects on 1,3-dipolar cycloadditions of benzonitrile oxide [PDF]
, 2005 The kinetics of 1,3-dipolar cycloadditions of benzonitrile oxide with a series of N-substituted maleimides and with cyclopentene are reported for water, a wide range of organic solvents and binary solvent mixtures.
Jan B. F. N. Engberts +5 more
core +1 more source
Cycloadditions with 2-Chloro-1-Nitroethylene
CHIMIA, 1975 2-chloronitroethylene replaces successfully the still elusive unsubstituted nitroacetylene in both the 1,3-dipolar and Diels-Alder cycloadditions. These reactions generally afford interesting nitrated cyclic and heterocyclic compounds.
R. Verbruggen, H.G. Viehe
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Molecules, 2001 The ZnBr2 complex of the title compound has been studied by both structural and theoretical methods. Similar reactivities have been observed for the nitrone alone and the complex in 1,3-dipolar cycloadditions and nucleophilic additions.
Tomas Tejero +5 more
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