Configurational ordering of cationic chiral dyes using a novel C2-symmetric hexacoordinated phosphate anion

Organic Letters

Volumn 2, Issue 26, 2000, Pages 4185-4187

  Lacour, Jérôme ^a   Londez, Anne ^a   Goujon Ginglinger, Catherine ^a   Buss, Volker ^b   Bernardinelli, Gerald ^a  

^a UNIVERSITY OF GENEVA   (Switzerland)

^b UNIVERSITY OF DUISBURG ESSEN   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001378116     PISSN: 15237060     EISSN: None     Source Type: Journal    
DOI: 10.1021/ol006731l     Document Type: Article

References (23)

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14. Tetrachlorocatechol was preferred to pyrocatechol as studies on 3 showed that the electron-withdrawing chlorine atoms enhance both the chemical and the configurational stability of the anion.
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19. The cation exchange proceeds similarly for 5 and 3, however, using basic alumina instead of silica gel. See ref 5d.
20. The asymmetric unit contains three pairs of cations and anions and four molecules of EtOAc. All the anions and cations have identical configuration, respectively. Crystallographic data are available as Supporting Information.
21. A or A corresponds to the configuration of the P-center and δ or λ to the conformational isomerism of the BINOL ligand.
22. 1H NMR, 400 MHz) are 151 and -44°C, respectively. See ref 6b.
23. Eggers, L.; Buss, V.; Henkel, G. Angew. Chem., Int. Ed. Engl. 1996, 35, 870-872.