One-Pot Synthesis of Spiro[fluorine-9,9'-xanthene] Derivatives

As a novel class of spirofluorenes, spirobifluorene (SBF) and spiro[fluorine- 9,9'-xanthene] derivatives (SFXs) have three-dimensional conformation, spiro-conjugation effect, and rigid steric hindrance, which can be widely used in the fields of synthetic chemistry, materials chemistry and supramolecular chemistry. Due to their facile one-pot synthetic route, and to the variety of molecular designs, SFXs are expected to become new spiro functional materials that replace SBF. In this review, we present the history, development and expansion of SFXs synthesis in one-pot methods, and the advantages and limitations of one-pot synthesis are also discussed.