Results 221 to 230 of about 34,105 (267)

Natural 1,3‐Dipolar Cycloadditions

Angewandte Chemie International Edition, 2015
[3+2] in the wild: Biomimetic natural product syntheses and theoretical considerations have indicated that 1,3-dipolar cycloadditions take place in nature. Now, the structure, biosynthesis, and function of a heavily modified prenylated flavin cofactor have been elucidated.
Martin, Baunach, Christian, Hertweck
openaire   +2 more sources

Extended dipolar cycloadditions

Journal of the Chemical Society, Perkin Transactions 1, 1975
Whilst the simple azomethine imine (5) undergoes the expected 1,3-dipolar cycloaddition to acetylenic esters, the extended azomethine imines (1) undergo 1,5-rather than 1,3-dipolar cycloaddition to give benzo[c][1,2,5]-triazepino[1,2-a]cinnolines (2), possibly by a stepwise mechanism 2-Alkyl-2λ5σ3-naphtho[1,8-de]triazines (12) and 2λ4σ2-naphtho[1,8-cd ...
Stephanie F. Gait, Michael J. Rance, Charles W. Rees, Reginald W. Stephenson, Richard C. Storr   +4 more
openaire   +1 more source

1,11-Dipolar cycloaddition

Journal of the Chemical Society, Chemical Communications, 1972
2-Methylnaphtho[1,8-de]triazine undergoes 1,11-dipolar (12π+ 2π) cycloaddition to acetylenic esters to give 2-methylacenaphtho[5,6-de]triazines, after spontaneous dehydrogenation.
C. W. Rees, R. W. Stephenson, R. C. Storr   +2 more
openaire   +1 more source

Asymmetric 1,3-dipolar cycloadditions

Tetrahedron, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
openaire   +1 more source

1,3-Dipolare Cycloaddition

1994
Von Huisgen 1,2) wurde 1963 die 1,3-dipolare Cycloaddition 3–5) als Reaktionsprinzip zum Aufbau von Heterocyclen systematisiert. Man versteht darunter die Addition eines 1,3-Dipols 1, der aus den verschiedenen Kombinationen von Kohlenstoff-, Stickstoff- und Sauerstoffatomen bestehen kann und vier nicht dienische π-Elektronen umfast, an eine ...
Thomas Laue, Andreas Plagens
openaire   +1 more source

1,3-Dipolar Cycloadditions in Aqueous Media

HETEROCYCLES, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
openaire   +2 more sources

Boryl Azides in 1,3-Dipolar Cycloadditions

The Journal of Organic Chemistry, 2014
The 1,3-dipolar cycloaddition reaction of boron azides with alkynes has been investigated experimentally and computationally. At room temperature pinBN3 (pin = pinacolato) reacts with the strained triple bond of cyclooctyne with formation of an oligomeric boryl triazole.
Matthias, Müller, Cäcilia, Maichle-Mössmer, Holger F, Bettinger   +2 more
openaire   +2 more sources

Rhodium-Mediated Dipolar Cycloaddition of Diazoquinolinediones

The Journal of Organic Chemistry, 1999
As an entry to furoquinoline structures of natural origin, the rhodium-mediated dipolar cycloaddition of diazoquinolinediones with alkenes and alkynes has been examined. Because of the unsymmetrical nature of the diazo compounds, both linear and angular furoquinoline products are possible.
Michael C., Pirrung, Florian, Blume
openaire   +2 more sources

Transition Metal Complexation in 1,3-Dipolar Cycloadditions

HETEROCYCLES, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
BROGGINI, GIANLUIGI, MOLTENI G, TERRANEO A, ZECCHI, GAETANO ALDO   +3 more
openaire   +3 more sources

1,3-Dipolar Cycloadditions

2012
R. P. Singh, L. Deng
  +4 more sources