Ren, Baoyi published the artcileSynthesis and characterization of bromo and acetyl derivatives of spiro [fluorene-9, 9′-xanthene], Related Products of naphthyridine, the publication is Huaxue Tongbao (2013), 76(6), 512-516, database is CAplus.
Bromination and acetylation of spiro [fluorene-9, 9′-xanthene] (SFX) as substrate have been described. As a result, six SFX-based derivatives I(R1 = Br, CH3CO, R2 = R3 = H; R1 = R2 = Br, CH3CO; R1 = R2 = R3 = Br, CH3CO) have been obtained under the condition of either bromo source from potassium bromate, potassium bromide with sulfuric acid at 0°C or acetylchloride as acylation reagent at room temperature The attacked positions of substituted SFX have been confirmed by the characterization of NMR, in which the bromination reaction in turn occur at the position of 2′, 7′ and 2 while the acetylation reaction in turn at the position of 2′, 2 and 7′. These results offer the basic platform to design the new-concept SFX-based organic semiconductors.
Huaxue Tongbao published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, Related Products of naphthyridine.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem