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Beilstein J. Org. Chem. 2022, 18, 1463–1465, doi:10.3762/bjoc.18.152
Beilstein J. Org. Chem. 2019, 15, 2092–2104, doi:10.3762/bjoc.15.207
Graphical Abstract
Figure 1: Sketch of the currently known prototypical examples of handcuff-derived architectures.
Figure 2: Chemical drawing of the known bis-calix[6]arene 1 and its handcuff pseudorotaxane architectures 32+...
Scheme 1: Synthesis of triple-calix[6]arene host 6.
Scheme 2: Formation of the 7+6, (7+)26, (7+)36 pseudorotaxane architectures by multiple-threading of 6 with 7+...
Figure 3: (Bottom) Portion of the ESI-FT-ICR mass spectrum of 7+6. (Top a–c) Significant portions of: (a) 1H ...
Figure 4: 1H NMR titration of 6 with 7+·TFPB– (CDCl3 , 298 K, 600 MHz). Significant portions of the 1H NMR sp...
Figure 5: ESI-FT-ICR-MS and HR-ESI-FT-ICR-CID mass spectrum of (7+)26.
Figure 6: Different views of the minimized structures of (7+)36 obtained by molecular mechanics calculations.
Scheme 3: Formation of the 4+6, (4+)26, (4+)36 pseudorotaxane architectures by multiple-threading of 6 with 4+...
Figure 7: (a–d) 1H NMR titration of 6 with 4+·TFPB− (CDCl3, 298 K, 600 MHz). Significant portions of the 1H N...
Figure 8: Different views of the minimized structures of (4+)36 obtained by molecular mechanics calculations.
Figure 9: (Top) Possible endo-benzyl and endo-alkyl stereoisomers obtainable by directional threading of cali...
Figure 10: (Left) HR-ESI-FT-ICR mass spectrum of 8+6. (Right) HR-ESI-FT-ICR-CID mass spectrum of (8+)26.
Figure 11: (a–d) 1H NMR titration of 6 with 8+·TFPB− (CDCl3 , 298 K, 600 MHz). Significant portions of the 1H ...
Beilstein J. Org. Chem. 2018, 14, 2112–2124, doi:10.3762/bjoc.14.186
Figure 1: Cartoon representation of the chiral rotaxane of the Goldup group [15,16] (I and I*) and of the chiral pse...
Figure 2: Cartoon representation of the rotaxane sequence isomers reported by Leigh [17] (III and IV) and of the ...
Figure 3: The possible 8 discrete conformations of a calix[6]arene macrocycle [26].
Figure 4: Diastereoisomeric pseudorotaxanes obtained by threading a directional calixarene wheel with directi...
Scheme 1: Synthesis of threads 2+ and 3+. Reagents and conditions: a) hexamethyldisilazane, LiClO4, 30 min, 6...
Figure 5: Possible mechanism for the formation of the two atropoisomeric pseudo[2]rotaxanes 2+1cone and 2+11,...
Figure 6: 1H NMR spectra (600 MHz, CDCl3, 298 K) of, from bottom to top: hexahexyloxycalix[6]arene 1; a 1:1 m...
Figure 7: DFT-optimized structures of the: (left) 2+1cone and (right) 2+11,2,3-alt pseudorotaxane atropoisome...
Figure 8: The two pseudorotaxane atropoisomers obtained by threading hexahexyloxycalix[6]arene 1 with monosto...
Figure 9: The two pseudorotaxane atropoisomers obtained by threading penta-O-methyl-p-tert-butylcalix[5]arene ...
Figure 10: 1H NMR spectra (600 MHz, CDCl3, 298 K) of, from bottom to top: hexahexyloxycalix[6]arene 1; a 1:1 m...