240133-09-9

Basic information

• Product Name: 2-butyl-3-phenyl-2-cyclopenten-1-one
• Synonyms: 2-butyl-3-phenyl-2-cyclopenten-1-one
• CAS NO: 240133-09-9
• Molecular Weight: 214.307
• Mol File: 240133-09-9.mol

Chemical Properties

• CAS DataBase Reference: 2-butyl-3-phenyl-2-cyclopenten-1-one(CAS DataBase Reference)
• NIST Chemistry Reference: 2-butyl-3-phenyl-2-cyclopenten-1-one(240133-09-9)
• EPA Substance Registry System: 2-butyl-3-phenyl-2-cyclopenten-1-one(240133-09-9)

Safety Data

• Hazardous Substances Data: 240133-09-9(Hazardous Substances Data)

Upstream product

• 201230-82-2 carbon monoxide 
• 1129-65-3 (hex-1-yn-1-yl)benzene 
• 321155-39-9 dimethyl(2-pyridinyl)(vinyl)silane 
• 154460-17-0 2-Butyl-3a,4,7,7a-tetrahydro-4,7-methano-inden-1-one 
• 693-02-7 hex-1-yne 
• 6270-17-3 ethyl 3-benzoylpropanoate 

Downstream Products

• 250139-26-5 C₅H₃(C₆H₅)2(CH₂)3CH₃ 

Relevant articles and documents

Catalytic intermolecular Pauson-Khand-type reaction: Strong directing effect of pyridylsilyl and pyrimidylsilyl groups and isolation of Ru complexes relevant to catalytic reaction

Some circumstantial evidence for the directing effect of the 2-pyhdylsilyl group in the Ru-catalyzed intermolecular Pauson-Khand-type reaction (PKR) of alkenyl(2-pyridyl)silane, alkyne, and carbon monoxide has been provided. Most importantly, we have succeeded in isolating several monometallic Ru complexes relevant to the catalytic reaction: Ru(vinylsilane)(CO)3 complexes and ruthenacyclopentene. While the stoichimetric reaction of the Ru(vinylsilane)(CO)3 complex with an alkyne led to the formation of the corresponding cyclopentenone (PKR product) at 100 °C, the ruthenacyclopentene intermediate was quantitatively produced at 50 °C. This complex was also converted to a cyclopentenone upon heating at 100 °C. Moreover, it was also found that the Ru(vinylsilane)(CO)3 complex and ruthenacyclopentene serve as catalysts in intermolecular PKR.

Preparation and reactions of monocyclic bis(cyclopentadienyl)titanacyclopentenes and -pentadienes

A combination of Cp2TiCl2-2EtMgBr was found to be very effective for the formation of monocyclic titanacyclopentenes in excellent yields. On the other hand, a combination of Cp2TiCl2-2n-BuLi was used for intermolecular coupling of two alkynes to form titanacyclopentadienes in good to excellent yields. A reaction temperature range from -10 to -30°C was critical for the success of the combinations. Reactions of these in situ-prepared titanacycles show interesting similarities to or differences from their zirconacycle analogs.

A novel tandem [2 + 2] cycloaddition-Dieckmann condensation with ynolate anions. Efficient synthesis of substituted cycloalkenones and naphthalenes via formal [n + 1] cycloaddition

A novel tandem [2 + 2] cycloaddition-Dieckmann condensation via ynolate anions is described. Ynolate anions are useful for the formation of reactive β-lactone enolates via a pathway not involving the enolization of the corresponding β-lactones. The [2 + 2] cycloaddition of ynolate anions with δ- or σ-keto esters, followed by Dieckmann condensation, gives bicyclic β-lactones, which are easily decarboxylated to produce synthetically useful 2,3-disubstituted cyclopentenones and cyclohexenones in one pot. This tandem reaction was applied to a novel, one-pot synthesis of highly substituted naphthalenes.

Synthesis of bis(1,2,3-substituted cyclopentadienyl)zirconium dichloride derivatives and their use in ethylene polymerization

Catalytic Pauson-Khand reaction products with norbornadiene could be effectively transformed to trisubstituted cyclopentadienes, which have been used to synthesize a series of unbridged bis(1-R′-2-R-3-R′-trisubstituted cyclopentadienyl)zirconium dichlorid