Park, Gyoosoon published the artcileH-bonding controls the regioselectivities on the acid-catalyzed reaction of fluorenone with phenol derivatives, Product Details of C25H16O, the publication is Bulletin of the Korean Chemical Society (2010), 31(7), 1837-1838, database is CAplus.
The usefulness of the acid-catalyzed reaction of fluorenone with phenol derivatives and the regio-control elements in the process were studied. All ab initio calculations were also carried out. The hydrogen-bonding decisively reveals in the ortho-product. Thus a relative stability of PD-a-OH attributes to intramol. hydrogen-bonding.
Bulletin of the Korean Chemical Society 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, Product Details of C25H16O.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem