The thermal rearrangement of several N-nitrosoamides was studied by (1)H NMR in the context of reversible encapsulation. The N-nitrosoamide guests were isolated from the bulk solvent in a hydrogen-bonded dimeric host capsule which prevented their rearrangement. The guests appear to be preserved in their ground state conformations by the pressure exerted by the host. The conformations of the free and bound N-nitrosoamides are of comparable relative energies as determined by DFT calculations. (C) 2010 Elsevier Ltd. All rights reserved.
The thermal rearrangement of several N-nitrosoamides was studied by (1)H NMR in the context of reversible encapsulation. The N-nitrosoamide guests were isolated from the bulk solvent in a hydrogen-bonded dimeric host capsule which prevented their rearrangement. The guests appear to be preserved in their ground state conformations by the pressure exerted by the host. The conformations of the free and bound N-nitrosoamides are of comparable relative energies as determined by DFT calculations. (C) 2010 Elsevier Ltd. All rights reserved.
作者:Aaron C. Sather、Orion B. Berryman、Dariush Ajami、Julius Rebek
DOI:10.1016/j.tetlet.2010.11.030
日期:2011.4
The thermal rearrangement of several N-nitrosoamides was studied by (1)H NMR in the context of reversible encapsulation. The N-nitrosoamide guests were isolated from the bulk solvent in a hydrogen-bonded dimeric host capsule which prevented their rearrangement. The guests appear to be preserved in their ground state conformations by the pressure exerted by the host. The conformations of the free and bound N-nitrosoamides are of comparable relative energies as determined by DFT calculations. (C) 2010 Elsevier Ltd. All rights reserved.