作者:Ana M.G. Silva、Augusto C. Tomé、Artur M.S. Silva、José A.S. Cavaleiro
DOI:10.1080/10426509808035737
日期:1998.9.1
The chlorosulfonation of flavone and 4'-methoxyflavone with chlorosulfonic acid occurs regioselectively in ring B. The chlorosulfonyl flavones were converted into their corresponding sulfonamides and sulfonates by reaction with alkylamines, anilines, isopropyl alcohol and p-chlorophenol. Two-dimensional (COSY and HETCOR) and one-dimensional selective INEPT experiments were carried out in order to unequivocally assign all the signals in the NMR spectra of compounds.