期刊
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1
卷 -, 期 17, 页码 1954-1962出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b205299g
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The syntheses of the bis-aromatic 15-crown-5 and 18-crown-6-ether derivatives 1 and 2, for the selective recognition of intra- and extracellular concentrations of Na+ and K+, from o-anisidine are described. These compounds were made with the aim of incorporating them into luminescent sensors. To facilitate their incorporation into such sensors, the compounds were nitrated. Whereas the use of conventional nitration reagents such as HNO3, HNO3-H2SO4\ or NO2BF4 only gave low yields of the desired products, both mono- and bis-nitration products were formed in good yield by one-pot synthesis using NaNO2 in a mixture of water and acetic acid (10 : 1). The use of X-ray crystallography proved the presence of the nitro-substituted products. An investigation into this mild nitration method revealed that the substitution pattern on the aromatic ring governed the ability of the compounds to undergo nitration.
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