Add time:09/03/2019         Source:sciencedirect.com

We synthesized a series of N-(6-azulenyl)-N-arylacetamides, and investigated their conformational preferences in solution and in the crystalline state by means of NMR and X-ray analyses. The results indicated that the conformational preferences of these amides are dependent on both the relative π-electron densities of the N-aromatic parts and the three-dimensional relationship of the carbonyl group to the aryl groups. The N-(6-azulenyl) group has a very different effect from the previously reported N-(2-azulenyl) group on the conformational preferences of aromatic amides.

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