331840-68-7

Upstream product

• 667886-89-7 1,5-bis(4-fluorophenyl)-1,3,5-pentanetrione 
• 1430234-44-8 1,5-bis(4-fluorophenyl)penta-1,4-diyn-3-one 
• 1430234-79-9 1,5-bis(4-fluorophenyl)penta-1,4-diyn-3-ol 
• 403-42-9 1-(4-fluorophenyl)ethanone 
• 29681-98-9 p-fluorobenzoylacetone 
• 456-22-4 4-Fluorobenzoic acid 
• 451-46-7 4-fluorobenzoic acid ethyl ester 

Downstream Products

• 1240259-78-2 C₄₃H₃₂NO₃S⁽¹⁺⁾*ClO₄^(1-) 
• 1256636-99-3 C₄₇H₄₁N₂O₂S⁽¹⁺⁾*ClO₄^(1-) 
• 1240259-76-0 C₃₁H₂₄O₄ 

Relevant academic research and scientific papers

Regiodivergent Hydration-Cyclization of Diynones under Gold Catalysis

Skipped diynones, efficiently prepared from biomass-derived ethyl lactate, undergo a tandem hydration-oxacyclization reaction under gold(I) catalysis. Reaction conditions have been developed for a switchable process that allows selective access to 4-pyrones or 3(2H)-furanones from the same starting diynones. Further application of this methodology in the total synthesis of polyporapyranone B was demonstrated.

Atom-economic synthesis of 4-pyrones from diynones and water

Transition-metal-free synthesis of 4-pyrones via TfOH-promoted nucleophilic addition/cyclization of diynones and water has been developed. This transformation is simple, atom economical and environmentally benign, providing rapid and efficient access to s

Bronsted acid catalyzed and NIS-promoted cyclization of diynones: Selective synthesis of 4-pyrone, 4-pyridone, and 3-pyrrolone derivatives

Bronsted acid catalyzed tandem cyclization was found to be highly effective for the preparation of a series of polysubstituted 4-pyrones from diynones (yield up to 99%). 4-Pyridone and 3-pyrrolone derivatives were also selectively synthesized by employing NIS and/or Bronsted acid. NIS as an electrophilic reagent could promote these reactions efficiently and rapidly under very mild reaction conditions.

Functional aromatic polyethers: Polymers with tunable chromogenic and fluorogenic properties

This paper describes the preparation and chemical modification of pyranone-based aromatic polyethers to yield polymers that contain pyrylium rings, which permit the design of high performance materials with "a la carte" chromogenic and fluorescence behavior. These materials can be used for innovative applications such as luminescent converter (LUCO) materials for hybrid light-emitting diodes (LEDs) or the preparation of selective chromogenic and fluorogenic sensing materials for the preparation of sensing devices. The fluorescence emission maxima of polyether films ranged from 514 to 561 nm, allowing the future development of LUCO-LED devices. Moreover, the interaction of polyether films with different amines leads to color changes and variations in the intensity and emission maxima of fluorescence, which permits the development of amine sensing materials.

New strong base synthesis of symmetrical 1,5-diaryl-1,3,5-pentanetriones from acetone and benzoate esters

Lithium hexamethyldisilazide (LiHMDS) was used to condense substituted benzoate esters with acetone to afford symmetrical 1,5-diaryl-1,3,5- pentanetriones that were isolated, characterized (including a representative X-ray crystallographic analysis), and