32729-47-8

Upstream product

• 4828-84-6 diazotetraphenylcyclopentadiene 
• 479-33-4 2,3,4,5-tetraphenylcyclopenta-2,4-dienone 

Downstream Products

• 53174-37-1 N-[1-(4-Nitro-phenyl)-meth-(Z)-ylidene]-N'-(2,3,4,5-tetraphenyl-cyclopenta-2,4-dienylidene)-hydrazine 
• 4828-84-6 diazotetraphenylcyclopentadiene 

Relevant academic research and scientific papers

Compound derived from cyclopentadienone, preparation method thereof and EL element using the same

Disclosed are a compound represented by the following formula (1), which is derived from cyclopentadienone and can be used as a core material for an organic electroluminescence element or other optical devices, and preparation method thereof, and an EL el

Cyclopentadienylidenephosphinazines

Diazocyclopentadienes which are not alkyl- or aryl-substituted at both the 2- and 5-positions react readily with triphenylphosphine to form cyclopentadienylidenephosphinazines. If both of these positions are so substituted phosphinazines are not formed. A phosphinazine was obtained from 2-chloro-3,4,5-triphenyldiazocyclopentadiene while its 2-nitro-analogue apparently formed a readily hydrolysed phosphinazine. Diazotetraphenylcyclopentadiene formed a phosphinazine with tri-n-butylphosphine. The reasons for these differences in reactivity are discussed. When heated to higher temperatures some of the phosphinazines decomposed with loss of nitrogen to give phosphonium cyclopentadienylides. Electron-withdrawing substituents in the five-membered ring make the phosphinazines susceptible to ready hydrolysis to cyclopentadienone hydrazones. Cyclopentadienylidenephosphinazines are protonated by mineral acids on nitrogen rather than on the cyclopentadiene ring.