Chromenone-diazonium-BF₄ salts were isolated as stable powders by diazotization of the 7-amino-derivatives with NaNO₂/HBF₄. The 7-Fluoro-derivatives were synthesized by fluorodediazoniation in [BMIM][PF₆], while the 7-iodo-derivatives were obtained by iododediazoniation with TMSI/[BMIM][PF₆]. Further iodination with NIS furnished the 2,7-di-iodo derivative. Dediazoniation in [BMIM][Tf₂N] gave the corresponding chromenone-OSO(CF₃)NTf compounds as major products, along with chromenoneN(Tf)₂ and the 7-fluoro-derivatives. Chromenone-diazonium salts undergo facile diazo-coupling with isomeric trimethoxybenzenes and dimethylaniline at r.t in aqueous EtOH or in [BMIM][PF₆] to give azo-dyes.

通过用NaNO ₂ / HBF ₄对7-氨基衍生物进行重氮化，可分离出稳定的粉末形式的Chromenone-diazonium-BF ₄盐。通过在[BMIM] [PF ₆ ]中进行氟脱重氮合成7-氟衍生物，而通过TMSI / [BMIM] [PF ₆ ]对碘进行重氮重氮化而获得7-碘衍生物。用NIS进一步碘化得到2，7-二碘衍生物。在[BMIM] [Tf ₂ N]中进行重氮化，得到相应的色酮-OSO （CF ₃）NTf化合物，以及色酮N（Tf）₂和7-氟衍生物。铬酮重氮盐在室温下于EtOH水溶液或[BMIM] [PF ₆ ]中与异构的三甲氧基苯和二甲基苯胺进行重氮偶合，得到偶氮染料。