Results 231 to 240 of about 43,074 (261)

The Reactivity of Addends in the 1,3-Dipolar Cycloaddition Reaction

Russian Chemical Reviews, 1984
The influence of donor-acceptor interactions and localisation energies on the reactivity of addends in the 1,3-dipolar cycloaddition reaction is examined. It is shown that the interactions between the symmetric frontier orbitals and between the antisymmetric frontier orbitals are qualitatively different in (4π+2π)-cycloaddition reactions.
Samuilov Y., Konovalov A.
openaire   +4 more sources

Concertedness of 1,3-dipolar cycloadditions

Journal of Chemical Education, 1984
The 1,3-dipolar cycloaddition is the union of a 1,3-dipole with a multiple bond system (a dipolarophile) to form a five-membered ring; the process is regarded as one of the most general methods for the synthesis of five-membered heterocycles.
openaire   +2 more sources

Peptidotriazoles on solid phase: [1,2,3]-triazoles by regiospecific copper(i)-catalyzed 1,3-dipolar cycloadditions of terminal alkynes to azides.

Journal of Organic Chemistry, 2002
C. Tornøe, C. Christensen, M. Meldal
semanticscholar   +1 more source

Click chemistry reactions in medicinal chemistry: Applications of the 1,3‐dipolar cycloaddition between azides and alkynes

Medicinal research reviews (Print), 2008
G. Tron, T. Pirali, R. Billington, P. Canonico, G. Sorba, A. Genazzani   +5 more
semanticscholar   +1 more source

Toward the Briarane Core via 1,3-Dipolar Cycloaddition

Organic Letters
The complete C20 framework of brianthein W was established, featuring hydroboration/allylation, to provide the C1-C2 quaternary/tertiary stereoarray with excellent stereocontrol. Intramolecular nitrile oxide cycloaddition (INOC) was adopted as the key transformation to establish the trans-fused 6/10-bicyclic ring system.
Yichen Liu, Jiangang Zhao, Ran Hong
openaire   +2 more sources

1,3-dipolar cycloadditions with porphyrins

2001
The objective of this work is to use 1,3-dipolar cycloadditions to synthesize novel aromatic compounds based on meso-phenyl substituted porphyrins. These compounds are potential photosensitizers for use in photodynamic therapy. Tetraphenylporphyrins with a variety of substituents were reacted with selected 1,3-dipoles.
openaire   +2 more sources

A fluorogenic 1,3-dipolar cycloaddition reaction of 3-azidocoumarins and acetylenes.

Organic Letters, 2004
K. Sivakumar, F. Xie, B. Cash, Su Long, Hannah N. Barnhill, Qian Wang   +5 more
semanticscholar   +1 more source

1,3-Dipolar Cycloaddition

2002
G. Hajos, Z. Riedl
openaire   +1 more source

Thiourea-Quaternary Ammonium Salt Catalyzed Asymmetric 1, 3-Dipolar Cycloaddition of Imino Esters To Construct Spiro[pyrrolidin-3,3'-oxindoles].

Organic Letters, 2016
Jiaxing Zhang, Hongyu Wang, Qiao-wen Jin, Changwu Zheng, Gang Zhao, Yongjia Shang   +5 more
semanticscholar   +1 more source

Synthesis of 2-aminoindolizines by 1,3-dipolar cycloaddition of pyridinium ylides with electron-deficient ynamides.

Organic Letters, 2015
Julien Brioche, C. Meyer, J. Cossy
semanticscholar   +1 more source