Dynamics of intramolecular metal-centered rearrangement reactions of tris-chelate complexes

2006 ◽  
pp. 91-137 ◽  
Author(s):  
Louis H. Pignolet
Keyword(s):  
Chelate Complexes ◽  
Rearrangement Reactions

scholarly journals Anomalous Rotatory Dispersion of Enzyme-Chelate Complexes

1961 ◽  
Vol 236 (3) ◽  
pp. 730-734
Author(s):  
David D. Ulmer ◽  
Bert L. Vallee
Keyword(s):  
Rotatory Dispersion ◽  
Chelate Complexes

Interaction of heterocycles and nucleophiles. II. Sigma complexes formed from methoxide ion and Methoxy-3,5-dinitropyridines in dimethyl sulphoxide

1970 ◽  
Vol 23 (5) ◽  
pp. 957 ◽  
Author(s):  
MEC Biffin ◽  
J Miller ◽  
AG Moritz ◽  
DB Paul
Keyword(s):  
Dimethyl Sulphoxide ◽  
No Conversion ◽  
Solvation Effects ◽  
Sigma Complexes ◽  
Sigma Complex ◽  
Methoxide Ion ◽  
Rearrangement Reactions

Contrasting behaviour is observed when 2- and 4-methoxy-3,5-dinitropyridine interact with methoxide ion in dimethyl sulphoxide. The 4-methoxy compound affords both methine and acetal sigma complexes, the latter being thermodynamically more stable. The interconversion is catalysed by methanol. Labelling experiments have established that the sigma complex from the 2-methoxypyridine is formed by addition at C6; no conversion into the acetal could be effected. These observations are rationalized in terms of differential steric and solvation effects. Demethylation and rearrangement reactions of 4-methoxy-3,5-dinitropyridine are reported.

scholarly journals Recent development and applications of semipinacol rearrangement reactions

2021 ◽  
Author(s):  
Xiao-Ming Zhang ◽  
Bao-Sheng Li ◽  
Shao-Hua Wang ◽  
Kun Zhang ◽  
Fu-Min Zhang ◽  
...  
Keyword(s):  
Total Synthesis ◽  
Quaternary Carbon ◽  
Carbon Formation ◽  
Semipinacol Rearrangement ◽  
Rearrangement Reactions

The recent development of semipinacol rearrangement is reviewed, highlighting its application in β-functionalized ketone synthesis, quaternary carbon formation and total synthesis.

Synthesis, structure and redox properties of Cu (II) chelate complexes on the basis of 2‐(hydroxyphenyl)‐1H‐benzo[d]imidazol‐1‐yl phenol ligands

2021 ◽  
Author(s):  
Eugeny Ivakhnenko ◽  
Pavel A. Knyazev ◽  
Yulia G. Vitkovskaya ◽  
Leonid D. Popov ◽  
Konstantin A. Lyssenko ◽  
...  
Keyword(s):  
Redox Properties ◽  
Chelate Complexes

Catalyst-Free [2,3]-Sigmatropic Rearrangement Reactions of Photochemically Generated Ammonium Ylides

Synthesis ◽  
2019 ◽  
Vol 51 (23) ◽  
pp. 4348-4358 ◽  
Author(s):  
Fang Li ◽  
Feifei He ◽  
Rene M. Koenigs
Keyword(s):  
Visible Light ◽  
Sigmatropic Rearrangement ◽  
Tertiary Amines ◽  
Amino Esters ◽  
Catalyst Free ◽  
Rearrangement Reaction ◽  
Rearrangement Reactions ◽  
Free Ammonium

The rearrangement reaction of ammonium ylides furnishes valuable α,α-disubstituted amino esters. In this work, we describe the visible-light photolysis reaction of aryldiazoacetates in the presence of tertiary amines that react via a free ammonium ylide in a sigmatropic rearrangement reaction to provide amino esters in moderate to very good yields (33 examples, up to 97% yield).

Photosubstitution in tris chelate complexes of ruthenium(II) containing the ligands 2,2'-bipyrazine, 2,2'-bipyrimidine, 2,2'-bipyridine, and 4,4'-dimethyl-2,2'-bipyridine: energy gap control

1989 ◽  
Vol 28 (6) ◽  
pp. 1013-1021 ◽  
Author(s):  
Helen B. Ross ◽  
Massoud Boldaji ◽  
D. Paul Rillema ◽  
Charles B. Blanton ◽  
Russell P. White
Keyword(s):  
Energy Gap ◽  
Chelate Complexes ◽  
Gap Control
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