This search combines search strings from the content search (i.e. "Full Text", "Author", "Title", "Abstract", or "Keywords") with "Article Type" and "Publication Date Range" using the AND operator.
Beilstein J. Org. Chem. 2026, 22, 399–415, doi:10.3762/bjoc.22.28
Graphical Abstract
Figure 1: General concept of building multifunctional calix[4]arenes by joining propargyl/2-azidoethyl and p-...
Scheme 1: Silylation of the calixarene propargyl ethers. Conditions: i) LiHMDS (HMDS + n-BuLi), TBSCl, THF, −...
Scheme 2: Nitration of calixarenes 6, 8–10. Conditions: i) HNO3 (fuming, 10 equiv per calixarene aromatic uni...
Figure 2: Parts of 1H,13C HMBC spectra of calixarenes 12 (a) and 13 (b) recorded in CDCl3 solutions at 600 MH...
Figure 3: Molecular structures of partially nitrated calixarene 16 (a) and exhaustively nitrated calixarene 15...
Scheme 3: Reduction of calixarenes 11, 15 and 17. Conditions: i) SnCl2·2H2O, HCl, EtOH, H2O, 70 °C, then KOH,...
Scheme 4: Protecting group replacement in propargylated p-aminocalix[4]arenes. Conditions: i) Boc2O, Et3N, di...
Scheme 5: Synthesis of 2-azidoethylated p-aminocalix[4]arenes. Conditions: i) HNO3 (fuming, 10 equiv per cali...
Scheme 6: Synthesis of triazolated p-aminocalix[4]arenes 37–39 from the propargylated calixarene precursors 24...
Scheme 7: Synthesis of triazolated p-aminocalix[4]arenes 40 and 41 from the 2-azidoethylated calixarene precu...
Scheme 8: Removal of Boc protection in calixarenes 37–41; (i) CF3CO2H, dichloromethane, rt, then NaHCO3/H2O.
Scheme 9: Synthesis of triazolated tetraureacalix[4]arenes 47–51. Conditions: (i) p-tolyl isocyanate, toluene...
Figure 4: Planar and energy-minimized structures (with CHCl3 molecule included and triazole groups highlighte...
Figure 5: Planar structures of homodimers 482, 512, and heterodimer 48·52 (a); fragment of the 1H NMR spectru...
Figure 6: Planar structures of homodimers 472, 502, and heterodimer 47·52 (a); fragment of the 1H NMR spectru...