In:
Helvetica Chimica Acta, Wiley, Vol. 81, No. 3-4 ( 1998-01), p. 632-645
Abstract:
The synthesis of new ‘bridged’ β‐cyclodextrin (β‐CD) ‘dimers’ 7–12 was successfully achieved by two one‐pot reactions from β‐CD (3) and 6 A ‐azido‐6 A ‐deoxy‐β‐CD (4) . The ‘phosphine imine’ reaction was shown to be a superior approach compared to the Mitsunobu reaction as coupling strategy for the preparation of these ‘dimers’. NMR Data, along with molecular‐modelling calculations, suggest a ‘helical‐like’ arrangement for the phenanthroline‐diyl‐linked ‘dimer’ derivative 9 . Complexation properties of 9 were established by UV‐VIS‐spectrophotometric titration toward four metals. Among them Cu II or Eu III ions were complexed selectively by 9 , but no complexation occurred with La III and Zn II . In addition a specific and interesting esterase activity toward the phosphodiester bond of bis(4‐nitrophenyl) phosphate anion was found in the case of the Cu II complex of 9 .
Type of Medium:
Online Resource
ISSN:
0018-019X
,
1522-2675
DOI:
10.1002/hlca.v81:3/4
DOI:
10.1002/hlca.19980810314
Language:
English
Publisher:
Wiley
Publication Date:
1998
detail.hit.zdb_id:
74-7
detail.hit.zdb_id:
1475013-2
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