Complex forming and extraction properties of oligo benzo-fused crown ethers
✍ Scribed by Olaf Heitzsch; Karsten Gloe; Alfréd Sabela; Jiří Koryta; Edwin Weber
- Publisher
- Springer Netherlands
- Year
- 1992
- Tongue
- English
- Weight
- 384 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0923-0750
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## Abstract Chiral diaza‐crown ether 6 and cryptands of type [2.2.2] (9), containing one glucopyranoside unit, have been prepared. Two methods are described for the synthesis of 9. The new cryptand 12 containing two glucopyranoside units has also been prepared. The association constants (__K__~a~)
## Abstract Five new proton‐ionizable macrocyclic ligands containing a pyrimidone‐subcyclic unit, 6–10, were prepared from the previously prepared pyrimidinocrown ethers 1–5 (see Figure 1 and Scheme 1). One of the new proton‐ionizable crown ethers is chiral. The proton‐ionizable pyrimidonocrown eth