Synthesis of 2,2'-Bipyridines with Axially Chiral 1,1'-Binaphthalene Units

2000 ◽  
Vol 65 (1) ◽  
pp. 83-98 ◽  
Author(s):  
Jana Hodačová ◽  
Ivan Stibor
Keyword(s):  
Enantiomerically Pure ◽  
Axially Chiral

Synthesis of a series of novel 2,2'-bipyridine-based ligands bearing the axially chiral 2,2'-dialkoxy-1,1'-binaphthalene units is presented. The oxydimethylene, amidomethylene and amido spacers have been utilised to link the 3 or 3,3' positions of the binaphthalene skeleton with the 6 or 6,6' positions of the 2,2'-bipyridine moieties. The ligands have been synthesised in both racemic and enantiomerically pureRforms.

Enantiomerically pure 1-(2-methoxy-1-naphthyl) and 1-(2-methylthio-1-naphthyl)isoquinoline: two new axially chiral NO and NS ligands for asymmetric catalysis

1999 ◽  
Vol 40 (3) ◽  
pp. 553-556 ◽  
Author(s):  
Giorgio Chelucci ◽  
Alessia Bacchi ◽  
Davide Fabbri ◽  
Antonio Saba ◽  
Fausta Ulgheri
Keyword(s):  
Asymmetric Catalysis ◽  
Enantiomerically Pure ◽  
Axially Chiral

scholarly journals Homochiral BINOL-based macrocycles with π-electron-rich, electron-withdrawing or extended spacing units as receptors for C60

2014 ◽  
Vol 10 ◽  
pp. 1308-1316 ◽  
Author(s):  
Marco Caricato ◽  
Silvia Díez González ◽  
Idoia Arandia Ariño ◽  
Dario Pasini
Keyword(s):  
Dicarboxylic Acids ◽  
Spectroscopic Methods ◽  
Statistical Distributions ◽  
One Pot ◽  
Enantiomerically Pure ◽  
One Pot Synthesis ◽  
Axially Chiral ◽  
Aromatic Dicarboxylic Acids ◽  
The One ◽  
Cyclic Adducts

The “one-pot” synthesis of several homochiral macrocycles has been achieved by using π-electron-rich, electron-deficient or extended aromatic dicarboxylic acids in combination with an axially-chiral dibenzylic alcohol, derived from enantiomerically-pure BINOL. Two series of cyclic adducts with average molecular D 2 and D 3 molecular symmetries, respectively, have been isolated in pure forms. Their yields and selectivities deviate substantially from statistical distributions. NMR and CD spectroscopic methods are efficient and functional in order to highlight the variability of shapes of the covalent macrocyclic frameworks. The larger D 3 cyclic adducts exhibit recognition properties towards C60 in toluene solutions (up to log K a = 3.2) with variable stoichiometries and variable intensities of the charge-tranfer band upon complexation.

Axially chiral 1,1′-binaphthyls with non-identical groups in 2,2′-positions. Synthesis of the enantiomerically pure 2-hydroxy-2′-thiol and substituted 2-amino-2′-thiols

1997 ◽  
Vol 8 (4) ◽  
pp. 537-546 ◽  
Author(s):  
Martin Smrčina ◽  
Štěpán Vyskočil ◽  
Jana Polívková ◽  
Jana Poláková ◽  
Jan Sejbal ◽  
...  
Keyword(s):  
Enantiomerically Pure ◽  
Axially Chiral

Enantiomerically Pure Axially Chiral Aminocarbene Complexes of Chromium

2008 ◽  
Vol 27 (8) ◽  
pp. 1850-1858 ◽  
Author(s):  
Luděk Meca ◽  
Ivana Císařová ◽  
Dušan Drahoňovský ◽  
Dalimil Dvořák
Keyword(s):  
Enantiomerically Pure ◽  
Axially Chiral
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