60824-72-8

Upstream product

• 15570-45-3 1,2,3,4-tetraphenylcyclopentadiene 
• 66-77-3 1-naphthaldehyde 
• 23277-00-1 1-naphthylmethyltriphenylphosphonium chloride 
• 479-33-4 2,3,4,5-tetraphenylcyclopenta-2,4-dienone 
• 13026-12-5 3-(1-naphthyl)propenoic acid 
• 501-65-5 diphenyl acetylene 
• 77150-88-0 (E)-1-(β-bromovinyl)naphthalene 

Relevant academic research and scientific papers

Palladium(II)-Catalyzed Oxidative Decarboxylative [2 + 2 + 1] Annulation of Cinnamic Acids with Alkynes: Access to Polysubstituted Pentafulvenes

An unprecedented palladium(II)-catalyzed oxidative decarboxylative [2 + 2 + 1] annulation of cinnamic acids with alkynes has been developed for the synthesis of polysubstituted pentafulvenes. Ag2CO3 and DMSO are essential for the reaction. This protocol features readily available starting materials, a wide substrate scope, and moderate to excellent yields. Moreover, various significant frameworks can be easily obtained from the late-stage transformations of pentafulvenes via oxidation, reduction, and Scholl-type reaction.

Method for synthesizing polysubstituted fulvene compound

The invention discloses a method for synthesizing a polysubstituted fulvene compound. The reaction general formula of the synthesis method is as follows. According to the technical scheme, under the action of a transition metal/oxidant catalytic system, a

Palladium-catalyzed intermolecular three-component coupling of organic halides with alkynes and alkenes: Efficient synthesis of oligoene compounds

The intermolecular three-component coupling of aryl or vinyl halides, diarylacetylenes, and monosubstituted alkenes effectively proceeds in the presence of palladium acetate, lithium chloride, and sodium bicarbonate as catalyst, promoter, and base, respectively, in aqueous DMF or DMSO to produce the corresponding 1,3-butadiene or 1,3,5-hexatriene derivatives. Use of dienyl bromides allows the coupling to afford 1,3,5,7-octatetraenes. Under the present catalytic conditions, fulvene derivatives are also formed efficiently by the 1:2 coupling of vinyl bromides and diarylacetylenes without adding the alkenes.

Low Molecular-Weight Glassy Fulvenes

Fulvenes 3 were synthesized from 1,2,3,4-tetraphenylcyclopenta-1,3-diene (1) and different aldehydes 2. They are glass-forming materials with well-defined glass-transition temperatures between 74°C and 120°C.