Ruman T, Jarmuła A, Rode W. The aromaticity of 5,6-dihydroborauracil, borauracil and benzoborauracil systems.
Bioorg Chem 2010;
38:242-5. [PMID:
20638706 DOI:
10.1016/j.bioorg.2010.06.004]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Revised: 06/25/2010] [Accepted: 06/25/2010] [Indexed: 11/16/2022]
Abstract
The nucleus-independent chemical shift (NICS) indices of aromaticity, calculated for four boron compounds, 4-hydroxy-5,6-dihydroborauracil, 4-hydroxyborauracil, borazine and 4-hydroxybenzoborauracil, and parent uracil, were analyzed in parallel with the NMR properties, in order to learn more about the aromaticity of those heterocyclic systems. The existence of a unique solvent-dependent aromaticity of 4-hydroxyborauracil is indicated.
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