2969-76-8

Usage

Uses

Used in Organic Synthesis:
1,3-difluoro-9H-fluoren-9-one is utilized as a building block for the synthesis of more complex organic molecules, leveraging its unique structural and electronic properties to facilitate the creation of advanced chemical compounds.
Used in Materials Science:
In the realm of materials science, 1,3-difluoro-9H-fluoren-9-one is employed for its potential applications in the development of organic light-emitting diodes (OLEDs), organic semiconductors, and other electronic devices, owing to its valuable electronic properties that contribute to the performance of these technologies.
Used in Research and Development:
1,3-difluoro-9H-fluoren-9-one serves as a reagent in various chemical reactions and processes within research and development settings, enabling scientists to explore new pathways and methods in chemical synthesis and material fabrication.

Upstream product

• 583-55-1 1-Bromo-2-iodobenzene 
• 201230-82-2 carbon monoxide 
• 156545-07-2 3,5-difluorophenylboronic acid 
• 886363-21-9 C₁₃H₈F₂O₂ 
• 88-65-3 2-bromobenzoic-acid 
• 6630-33-7 ortho-bromobenzaldehyde 
• 934691-50-6 3’,5’-difluorobiphenyl-2-carbaldeyhde 
• 610-94-6 2-bromobenzoic acid methyl ester 
• 2265-91-0 1,3-difluoro-5-iodobenzene 

Downstream Products

• 2841-35-2 2-Amino-6.8-difluor-9-oxo-fluoren 
• 2841-37-4 1,3,7-Trifluor-fluorenon 

Relevant academic research and scientific papers

A 9 - fluorenylmethylchloroformate ketone and its T-shaped oligo phenylene skeleton the preparation method of compound

The invention relates to a preparation method for 9-fluorenone and T type oligomeric phenylene skeleton compounds. The method includes: under the condition of 90-100DEG C, in a toluene solution, taking palladium acetate and tricyclohexylphosphine as the catalytic system, and adopting cesium carbonate as alkali, reacting o-dihalogenated aromatic hydrocarbon with arylboronic acid or aryl boric acid ester under CO atmosphere for 12h, thus obtaining a series of 9-fluorenone and T type oligomeric phenylene skeleton compounds. The method provided by the invention adopts simple, economical and easily available raw materials as the substrate, under the CO balloon pressure, palladium catalyzed carbonylation three-component cascade reaction is carried out to realize synthesis of 9-fluorenone compounds. Through bifunctionalization, Pi conjugated system expanded T type oligomeric phenylene skeleton compounds that are difficult to realize by previous methods can be constructed by one step, and the compounds have very great application prospects in pharmaceutical synthetic intermediates and organic photoelectric material science.

Compound, liquid crystal composition and liquid crystal display

The invention relates to the technical field of liquid crystal display, especially to a compound, a liquid crystal composition and a liquid crystal display (LCD). The compound has good thermal and optical stability, high phase inversion temperature, optical anisotropy and dielectric anisotropy and low viscosity, and has a good liquid crystal display effect when used for an LCD. The embodiment of the invention provides a compound, the structural formula of which is as shown in the formula (I).

Synthesis of Fluoren-9-ones and Ladder-Type Oligo-p-phenylene Cores via Pd-Catalyzed Carbonylative Multiple C-C Bond Formation

A new route to various substituted fluoren-9-ones has been developed via an efficient Pd-catalyzed carbonylative multiple C-C bond formation. Under a CO atmosphere, using commercially available aryl halides and arylboronic acids as substrates, this three-component reaction proceeded smoothly in moderate to excellent yields with good functional-group compatibility. The mechanistic investigations suggested a sequential process for the reaction that forms o-bromobiaryls in the first stage followed by a cyclocarbonylation reaction. This chemistry has been successfully extended to construct ladder-type oligo-p-phenylene cores. (Chemical Equation Presented).

Synthesis of fluorenones via quaternary ammonium salt-promoted intramolecular dehydrogenative arylation of aldehydes

Biologically interesting fluorenone, xanthone and anthrone derivatives have been prepared via an intramolecular oxidative acylation process. This novel direct acylation reaction proceeded without the aid of any transition metals, acids or bases, and uses a catalytic amount of a quaternary ammonium salt in the presence of a persulfate oxidant. Initial mechanistic studies have been carried out to elucidate the reaction pathway. The Royal Society of Chemistry 2013.

An aryl to imidoyl palladium migration process involving intramolecular C-H activation

Biologically interesting fluoren-9-one and xanthen-9-one derivatives have been prepared by a novel aryl to imidoyl palladium migration, followed by intramolecular arylation. The fluoren-9-one synthesis appears to involve both a palladium migration mechanism and a C-H activation process proceeding through an unprecedented organopalladium(IV) hydride intermediate. The results from deuterium labeling experiments are consistent with the proposed dual mechanism.