作者:Paymaneh Y.F Deghati、Hans Bieräugel、Martin J Wanner、Gerrit-Jan Koomen
DOI:10.1016/s0040-4039(99)02073-0
日期:2000.1
To obtain selectively functionalized 1-deazapurine nucleosides, the nitrating mixture tetrabutylammonium nitrate/trifluoroacetic anhydride (TBAN/TFAA) has been studied. This mixture demonstrated several merits: the use of an easy to handle reagent, mild reaction conditions and high selectivity for nitration in the pyridine ring. Nitration occurred at the alpha or beta-position with respect to the pyridine nitrogen atom, depending on the substituents in the ring. Electron withdrawing substituents in the pyridine ring showed a positive effect on this nitration. (C) 2000 Elsevier Science Ltd. All rights reserved.